A
User Guide
RM1xx Series Development Kit
Version 1.1
DVK-RM1xx-SM rev. 1
RM1xx Series Development Kit
User Guide
REVISION HISTORY
Version
1.0
Date
24 May 2016
Notes
Initial Release
Approver
Jonathan Kaye
1.1
08 July 2016
Added section numbers
Sue White
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RM1xx Series Development Kit
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CONTENTS
1
Laird RM1xx Development Kit Part Numbers .....................................................................................................4
2
Overview.............................................................................................................................................................4
3
Introduction ........................................................................................................................................................4
4
Package Contents ...............................................................................................................................................4
5
RM1xx Development Kit – Main Development Board .......................................................................................5
5.1.
6
Key Features ...................................................................................................................................................5
Understanding the Development Board ............................................................................................................7
6.1.
7
RM1xx Default Configuration and Jumper Settings .......................................................................................9
Functional Blocks ............................................................................................................................................. 10
7.1.
Power Supply ............................................................................................................................................... 12
7.2.
Reset Button ................................................................................................................................................ 13
7.3.
SWD Interface.............................................................................................................................................. 13
7.4.
4-wire UART Serial Interface ....................................................................................................................... 13
7.5.
UART Mapping ............................................................................................................................................. 13
7.6.
nAutoRUN Pin and Operating Modes.......................................................................................................... 15
7.7.
Mounting Hole for LoRa Dipole Antenna .................................................................................................... 16
8
Software .......................................................................................................................................................... 17
9
Breakout Connector Pinouts ........................................................................................................................... 18
9.1.
J28(J13, J14), J29, J1 (J3, J4, J5, J9), J12(J10), J6 SIO (Special Input / Output Sockets) Breakout Connectors
18
9.2.
Additional Peripherals / Sensors ................................................................................................................. 21
9.3.
Arduino Connector for plugging in an Arduino Shields ............................................................................... 21
10
Other Features............................................................................................................................................. 29
10.1.
11
Current Consumption Measurement ...................................................................................................... 29
Additional Documentation .......................................................................................................................... 32
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1
LAIRD RM1XX DEVELOPMENT KIT PART NUMBERS
Part number:
DVK-RM1xx-SM / DVK-RM1xx-SM
Applicable to the following rev. 01 RM1xx module part numbers:
2
RM186-SM-01
RM191-SM-01
RM186 LoRa & BLE Module featuring smartBASIC (CE)
RM191 LoRa & BLE Module featuring smartBASIC (FCC)
OVERVIEW
The Laird DVK-RM1xx development kit provides a platform for rapid wireless connectivity prototyping, providing
multiple options for the development of LoRa and Bluetooth Low Energy (BLE) applications. This manual is for
Rev. 01 and later of the development PCB and relates to RM1xx-SM-01 and later on the PCB itself.
3
INTRODUCTION
The Laird LoRa and BLE development kit is designed to support the rapid development of applications and
software for the RM1xx series of LoRa and BLE modules featuring Laird’s innovative event driven programming
language – smartBASIC. More information regarding this product series including a detailed module User’s
Manual and smartBASIC user guide is available on the Laird’s RM1xx product pages.
4
PACKAGE CONTENTS
All kits contain the following items:
Development Board
Power Options
The development board has the required RM1xx module soldered onto it and exposes all the
various hardware interfaces available.
USB cable – Type A to micro type B.
(The cable also provides serial communications via the FTDI USB – RS232 converter
chip on the development board.)
DC barrel plug with clips for connection to external power supply (7-12V)
3x AAA battery holder fitted on underside of development board
2pin-Jumpers for
Pin Headers x 5
Supplied 2 pin jumpers spares. The jumpers are for 2.54 mm pitch headers used on DVK-RM1xxV1 development board.
Fly lead x 6
Supplied to allow simple connection of any RM1xxmodule pin (available on Plated Though Holes
on J28, J29, J1(J3, J4, J5, J9), J7, J8, J10, J13, J14) to any Arduino pin (available on Plated Though
Holes on J15, J23, J16, J17, J20, J24, J21)
Externa LoRa dipole
antenna
Web link Card
Externa multiband LoRa dipole antenna, 0.9dBi, 863-928MHz, (Laird part # 0600-00060)
Provides links to additional information including the RM1xx user manual, firmware, terminal
utilities, schematics, quick start guides, and firmware release notes and much more.
Note:
Sample smartBASIC applications are available to download from the Laird RM1xx
applications GitHub webpage or via the Laird global FAE network.
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5
RM1XX DEVELOPMENT KIT – MAIN DEVELOPMENT BOARD
This section describes the RM1xx development board hardware. The RM1xx development board is delivered
with the RM1xx series module loaded with integrated smartBASIC runtime engine FW but no onboard
smartBASIC application; because of this, it starts up in AT command mode by default.
Applications in smartBASIC are simple and easy to develop for any LoRa and BLE application. Sample smartBASIC
applications are available to download from the Laird RM1xx applications GitHub webpage
The RM1xx development board is a universal development tool to highlight the capabilities of the RM1xx
module. The development kit is supplied in a default configuration which should be suitable for multiple
experimentation options. It also offers number of header connectors that help isolate on-board sensors and
UART from the RM1xx module to create different configurations. This allows you to test different operating
scenarios. The development board also has support for plugging in 3rd party Arduino Shield boards.
The development board allows the RM1xx series module to physically connect to a PC via the supplied USB cable
for development purposes. The development board provides USB-to-Virtual COM port conversion through a
FTDI chip – part number FT232R. Any Windows PC (XP or later) should auto-install the necessary drivers; if your
PC cannot locate the drivers, you can download them from http://www.ftdichip.com/Drivers/VCP.htm
5.1.
Key Features
The RM1xx development board has the following features:
RM1xx series module soldered on-development board.
Power supply options for powering development board from:
– USB (micro-USB, type B)
– external DC supply (7-12V)
– AAA batteries (3xAAA battery holder fitted on underside of development board)
Regulated 3.3 V for powering the RM1xx module. Optional regulated 1.8 V for powering the RM1xx module
via selection switch.
USB to UART bridge (FTDI chip).
RM1xx UART can be interfaced to:
– USB (PC) using the USB-UART bridge
– External UART source (using IO break-out connectors J1 when development board powered from DC
jack)
Current measuring (for RM1xx module only) options:
– Pin header (Ammeter)
– Current shunt monitor IC (volt meter or oscilloscope)
– Series resistor for differential measurement (oscilloscope)
– Coulomb Counter
IO break-out 2.54mm pitch pin header connectors (Plated through Holes) that bring out all interfaces of the
RM1xx module [UART, SPI, I2C, SIO (DIO or AIN (ADCs)] and allow for plugging-in external modules/sensors.
Pin headers jumpers that allow the on-board sensors, LED’s (and USB UART FTDI bridge) to be disconnected
from RM1xx module (by removing jumpers).
Three on-board sensors:
– Analog output Temperature sensor,
– I2C Coulomb Counter,
– SPI IO Expander (connects to four LED’s and one Button),
Two Buttons and five LEDs (of which 4 LED’s behind SPI IO expander) for user interaction.
One Analog Buffer (provides a 3.3:1 attenuation) used when Analog source is at 5V into devboard.
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Arduino connectors – allow for plugging of Arduino Shield boards. DVK-RM1xx-V1 development board is
NOT an Arduino Shield, but is an Arduino base board (similar to the Arduino UNO).
Arduino connector Test Points – all Arduino connector signals brought out to Plated-through Holes
(2.54mm pitch). Allow any Arduino connector signal (D0-D13 or A0-A5) to be connected to any RM1xx
module using fly leads for maximum flexibility.
Arduino connectors orientation at 90 degrees to the dev board long dimension, allowing larger Arduino
Shields to hang off side of dev board so not interfering with mounted external antenna or the RM1xx
module (the BLE chip antenna).
External Antenna Mounting Hole – for mounting the RM1xx LoRa external antenna.
smartBASIC runtime engine FW upgrade capability:
– Via UART (using the FTDI USB-UART)
smartBASIC application upgrade capability:
– Via UART (using the FTDI USB-UART)
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6
UNDERSTANDING THE DEVELOPMENT BOARD
Figure 1 illustrates the contents of the DVK-RM1xx development board.
Headers for
accessing UART
J1 header Plated
through Holes (PTH)
for UART
Header J12 for
nAutRUN
TP14
GND
J7
Temperature
Sensor
J8
FTDI-FT232R
I2C device
U4
J11 Current
Measurement
USB
J28 PTH
USB1
DC/USB
Power
Source
Switch
SW4
RM1xx module
J14,
J13
TP6 Current
Measurement
output of
Current Shunt
Monitor U7
J29 PTH
LoRa
Antenna
Mount
LED1, LED2, LED3,
LED4
DC Jack 712V Input
CON1
on SPI IO expander
U2
Arduino
connecters
PTH Test
Points J23
J16
Arduino
connecters
J33 J31
Button2
1
Arduino
connecters
J32 J30
Arduino
connectors
PTH Test
Points J22 J14
Button1
1
SW3
nReset
Button
Figure 1: DVK-RM1xx schematic
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Figure 2: Development board DVK-RM1xx-V1 (fitted with RM186-SM module for example)
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6.1.
RM1xx Default Configuration and Jumper Settings
Important!
To ensure correct ‘out of the box’ configuration, the RM1xx development board must be set
according to Figure 3.
Figure 3: Correct development board jumper settings
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7
FUNCTIONAL BLOCKS
The RM1xx development board is formed by the major functional blocks shown in Figure 4.
Figure 4: DVK-RM1xx-V1 Block Diagram
Table 1: DVK-RM1xx-V1 Header connectors default jumper positions and – signal mapping on devboard
Default
On Block
Diagram?
NO
YES
J#
#pins
J1
J2
6
3
J3
2
Fitted
YES
J4
3
Pin 2-3
YES
J5
2
Fitted
YES
J6
2
NOT
Fitted
YES
J7
3
Pin 2-3
YES
J8
3
Pin 1-2
YES
J9
3
Pin 2-3
YES
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Function
Default
Serial Port header
I/O expander port pins
Routes SIO_23 (RTS) to FTDI CTS or
disconnects
Routes SIO_21 (TX) to FTDI RX or
Arduino TX
Routes SIO_24 (CTS) to FTDI RTS or
disconnects
Pins not populated
Pins not populated
Can be used to ground SIO_28
No Jumper- SIO_28 is floating
Connects BUTTON2 or Temp Sensor
to SIO_5
Connects SIO_6 to LED5 or Analog
Input Buffer
Connects SIO_22 (RX) to FTDI TX or
Arduino RX
10
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Module SIO_23 (RTS) to FTDI CTS
Module SIO_21 (TX) to FTDI RX
Module SIO_24 (CTS) to FTDI RTS
Module SIO_5 to BUTTON2
Module SIO_6 to LED5
Module SIO_22 (RX) to FTDI TX
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J#
#pins
Default
On Block
Diagram?
J10
2
Fitted
YES
J11
3
Pin 1-2
YES
J12
3
NOT
Fitted
YES
J13
3
Pin 2-3
YES
J14
3
Pin 2-3
YES
J15
8
NO
J16
6
NO
J17
2
Fitted
YES
J18
3
Pin 2-3
YES
J19
2
J20
2
Fitted
YES
J21
2
Fitted
YES
J22
10
NO
J23
8
NO
J24
2
Fitted
YES
J27
2
NOT
Fitted
NO
J28
J29
J30
J31
J32
J33
4
6
8
6
10
8
J34
2
NO
J26
NO
NO
NOT
Fitted
YES
J35
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Function
Default
Connects SIO_25 (nAUTORUN) to
FTDI DTR
Inserts/bypass the Coulomb
Counter
Module SIO_25 (nAUTORUN) to FTDI
DTR
Pulls SIO_25 (nAUTORUN) high or
low
Routes SIO_29 (I2C SCL) to Coulomb
Counter or Arduino SCL pin
Routes SIO_30 (I2C DAT) to
Coulomb Counter or Arduino SDA
pin
Arduino plated holes for access to
D0 thru D7
Arduino plated holes for access to
A0 thru A5
Connects Arduino A0 pin to Analog
Input Buffer
Connects SIO_4 (SPI SS) to I/O
Expander or to Arduino D10 (for use
as SPI Slave Select)
Not populated- just plated through
holes
Connects SIO_3 (SPI MOSI) to
Arduino D11
Connects SIO_0 (SPI SCK) to Arduino
D13
Arduino plated holes for access to
signals
Arduino plated holes for access to
signals
Connects SIO_17 (SPI MISO) to
Arduino D12
Plated test points for I/O expander
pins
When installed, it will hold the FTDI
chip in reset
RM1xx pin plated holes for access
RM1xx pin plated holes for access
Arduino female header
Arduino female header
Arduino female header
Arduino female header
Can be used for to make module
plus other devboard circuitry
current measurement after solder
bridge SB3 has been cut
Plated test points for I/O expander
pins
11
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Coulomb Counter bypassed
NOT Fitted- to use, first remove J10,
then pull nAUTORUN high or low via
J12
SIO_29 routed to Coulomb Counter
SIO_30 routed to Coulomb Counter
Pins not populated
Pins not populated
Connects Arduino A0 pin to Analog
Input Buffer
Module SIO_4 (SPI SS) connected to
I/O Expander Slave Select
Module SIO_3 (SPI MOSI) connected
to Arduino D11
Module SIO_3 (SPI MOSI) connected
to Arduino D11
Module SIO_3 (SPI MOSI) connected
to Arduino D11
FTDI not in reset
By default, the solder bridge SB3
shorts across this jumper, and the
short jumper is not installed
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J#
J36
7.1.
#pins
2
Default
On Block
Diagram?
Pin 2-3
YES
Function
Default
When fitted, shorts across USB
power switch to allow for a “dumb”
USB charger as a power source
By default, the devboard will work
properly when connected to a
standard USB port on a computer. To
use a dumb USB power source, install
J36 shorting Pin 1-2
Power Supply
Figure X shows the DVK-RM1xx development board Power Supply block.
Figure 5: DVK-RM1xx power supply
There are three options for powering the development board:
USB (type micro-B connector) (USB1)
external DC supply (7-12V), into DC jack connector (CON1),
AAA batteries (3xAAA battery holder (J25) fitted on underside of development board)
The power source fed into DC jack (CON1) (which is then regulated by a DCDC to 5V) or 3xAAA batteries (J25) is
combined together through diodes (diode-OR) and fed to the SW4 switch. SW4 selects the power source
between either USB or the DC jack (5Vregulated)/AAA.
The 5V from the USB or the 5V from DCDC output/AAA batteries is regulated down to 3.3 V with an on-board
regulator (U6) on the development board.
The development board also has a 1.8V regulator, allowing for the possibility to power the RM1xx module from
a 1.8V rail.
Switch SW5 selects between the regulated 3.3 V and regulated 1.8 V. Default position of SW5 is to select
regulated 3.3 V.
Development Board Power Source
USB (USB1)
SW4
Position “USB”
SW5
Position “3V3” or “1V8”
DC jack (CON1) or AAA battery (J25).
Position “DC”
Position “3V3” or “1V8”
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The Arduino connector (J33) receives the following:
12V from the DC jack (CON1) directly into the Arduino connector J33 pin8 (Vin_12V_ARD) via protection
diode (D9) and 1A fuse (F1).
5V is generated from the on-board DCDC regulator (U8) on the development board into the Arduino
connector J33 pin5 (VCC_5V_ARD). The U8 12V input is taken from DC jack(CON1).
3.3V generated from a separate regulator (U9) is used to supply the Arduino connector J33 pin4, 3.3V
domain only (VCC_3V3_ARD).
On the development board, the power circuity is as follows:
VCC_3V3 - supplies the FTDI chip power as well as temperature sensor (U1).
VCC_IO_UART - supplies the FTDI chip IO and all other sensors and circuitry.
VCC_Radio - supplies the RM1xx series module only plus the Coulomb Counter IC (U4). Current measuring
block (the current shunt monitor IC (U7)) on development board only measures the current into power
domain VCC_Radio.
VCC_Radio also supplies the VCC_BLE and VCC_LORA domains which power the RM1xx series module only.
VCC_12V_ARD - supplies Arduino connector only.
VCC_5V_ARD - supplies Arduino connector only and the Analog buffer IC (U3) attenuator circuit.
VCC_3V3_ARD - supplies Arduino connector only.
Note:
7.2.
Although the development board allows the RM1xx module to be powered from 3.3V or 1.8V (by
selection switch SW5); the Coulomb Counter IC (U4) cannot operate below 2.7V (2.7V-3.6V). When
operating RM1xx module on the development board from 1.8V (power selection switch SW5 in
position “1V8”), the coulomb counter IC circuit should be bypassed (by fitting jumper back on J11 pins
1 and 2, which is the default).
Reset Button
The development board has a reset button (SW3). The Reset is active low (SW3 pushed down). To view its
location, refer to Figure 2.
7.3.
SWD Interface
The development board provides access to the RM1xx module 2-wire interface (called SWD in this document) on
JP1. This is NOT required for customer use, since the RM1xx module supports both smartBASIC runtime engine
firmware and smartBASIC application loading over the UART.
7.4.
4-wire UART Serial Interface
The development board provides access to the RM1xx module 4-wire UART interface (TX, RX, CTS, RTS) either
through USB (via U10 FTDI USB-UART convertor chip) or through a breakout header connector JP5. Refer to
Figure 6.
Note:
7.5.
RM1xx module provides 4-wire UART interface on the HW and the other 4 signals (DTR, DSR, DCD, RI)
which are low bandwidth signals can be implemented in a smartBASIC application, using any spare
digital SIO pins.
UART Mapping
UART connection on the RM1xx series module and FTDI IC are shown in table below. Figure 6 explains how the
RM1xx series module UART is mapped to the breakout header connectors (J3, J4, J5, J9). These connections are
listed in Table 2.
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Table 2: SIO / UART connections
RM1xx SIO
SIO.21
RM1xx Default function
UART_TX (output)
FTDI IC UART
USB_RX
SIO.22
UART_RX (input)
USB_TX
SIO.23
UART_RTS (output)
USB_CTS
SIO.24
UART_CTS (input)
USB_RTS
Additionally SIO.25 which is the nAutoRUN input pin on the module can be driven by the USB_DTR output pin of
the FTDI chip. This allows testing the $autorun$ application on boot without setting the autorun jumper on the
development board. Autorun can be controlled directly from Laird’s UWTerminal using the DTR tick box.
7.5.1. UART Interface Driven by USB
USB Connector. The development kit provides a USB Type micro-B connector (USB1) which allows
connection to any USB host device. The connector optionally supplies power to the development kit and
the USB signals are connected to a USB to serial convertor device (FT232R), when SW4 is set to ‘USB’
position.
USB – UART. The development kit is fitted with a (U10) FTDI FT232R USB to UART converter which provides
USB-to-Virtual COM port on any Windows PC (XP or later). Upon connection, Windows auto-installs the
required drivers. For more details and driver downloads, visit
http://www.ftdichip.com/Products/FT232R.htm.
UART interface driven by USB FTDI chip. In normal operation, the RM1xx UART interface is driven by the
FTDI FT232R USB to UART converter.
7.5.2. UART Interface Driven by External Source
UART interface driven by external UART source. The RM1xx module UART interface (TX, RX, CTS, RTS) is
presented at a 2.54 mm (0.1”) pitch header (J1). To allow the RM1xx UART interface to be driven from the
breakout header connector (J1), the following must be configured:
– Development board must be powered from DC jack (CON1) or AAA batteries (J25) and switch SW4 is
in DC position.
– The FTDI device must be held in reset. This is achieved automatically by removal of USB cable,
placing SW4 in the DC position, or fitting a jumper on J27.
– Also jumpers on header connectors J3, J4, J5, J9 allows the four RM1xx UART pins to be physically
isolated as well from USB-UART FTDI device. By default, the jumpers on J3, J4, J5, J9 are fitted to
route UART pins to U10 FTDI FT232R USB –UART convertor.
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VCC_IO_UART VCC_IO_UART
R2
10K
R3
10K
Default: J3 Jumper fitted.
1
USB_CTS
J3
1
2
2
R6 560R
SIO_23
Module_RTS
PIN HEADER,2.54mm 1X2P
USB-UART
bridge chip
Default: J4 Jumper fitted pin2-3.
3
2
USB_RX
J4
PIN HEADER,2.54mm 1X3P
1
D1_TX
3
1
R10
10K
R11
10K
2
FTDI VCC_IO_UART VCC_IO_UART
FT232RQ
R9 560R
SIO_21
Module_TX
RM1xx
module
UART
Default: J5 Jumper fitted.
1
USB_RTS
J5
1
2
2
R12 560R
SIO_24
Module_CTS
PIN HEADER,2.54mm 1X2P
Default: J9 Jumper fitted pin2-3.
3
VCC_IO_UART
2
USB_TX
J9
PIN HEADER,2.54mm 1X3P
1
D0_RX
3
1
2
R19
10K
R21 560R
Module_RX
SIO_22
Module_RX
Figure 6: USB to UART Interface and Header to UART interface
J1 pinout is designed to be used with FTDI USB-UART TTL (3.3V) convertor cables (found at
http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm). One example is FTDI part TTL-232R-3V3.
VCC_IO_UART
GND
USB_CTS
VCC
USB_TX
USB_RX
USB_RTS
GND
RTS
VCC GND
RX
TX
CTS
SIO_23
SIO_22
SIO_21
SIO_24
R1
NOPOP (0R)
J1
1
2 1
3 2
4 3
5 4
6 5
6
NOPOP (PIN HEADER,2.54mm 1X6P)
FTDI (USB to TTL 232 Cable)
Figure 7: J1 wiring to match FTDI USB-UART cable (TTL-232R-3V3 cable)
Remove jumpers on J3, J4, J5, J9 when connecting an external FTDI USB-UART TTL (3.3V) convertor cable
using J1.
7.6.
nAutoRUN Pin and Operating Modes
On the development board USB_DTR output (FTDI chip U10) from PC is wired to RM1xx module pin SIO25 (pin6)
which is the nAutoRUN pin.
Note:
smartBASIC runtime engine FW checks for the status of nAutoRUN during power-up or reset. The
nAutoRUN pin detects if the RM1xx module should power up into “Interactive / Development Mode
(3.3 V)” or “Self-contained Run Mode (0v)”. The module enters Self-contained Run Mode if the
nAutoRUN pin is at 0V and an application called “$autorun$” exists in the modules file system, then
the smartBASIC runtime engine FW will execute the smartBASIC application script automatically;
hence the name Self-contained Run mode.
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The nAutoRUN pin inhibits the automatic launch $autorun$ application on power-up. Tying nAutoRUN to 3.3V
inhibits the $autorun$ application from running. The J12 3-pin header allows a jumper to be fitted to select
between the two operating modes.
Note:
Header J10 jumper MUST be REMOVED when using J12 3-pin header to select nAutoRUN function.
Table 3: RM1xx nAutorun header
nAutoRUN
pin
RM1xx Operating Mode
Interactive /
Self-contained
Development Mode Run Mode
(autorun mode)
Circuit
J12 jumper
position
VCC_IO_UART
n_Autorun /
module_DSR
R25
10K
USB_DTR
Module_DSR 1
1
2
2
SIO_25
J10
PIN HEADER,2.54mm 1X2P
VCC_IO_UART
3
3
R29
10K
2
1
2
1
J12
PIN HEADER,2.54mm 1X3P
R31
10K
Develop:
Jumper J12 pin2-3
nAUTORUN: Jumper J12 pin2-1
GND
Line driven by USB_DTR: No jumper in J12 (Default)
Line driven by USB_DTR: J10 jumper fitted (Default)
J10 header connector allows USB_DTR signal from the FTDI chip to be disconnected from reaching the RM1xx.
Since RM1xx nAutoRUN pin6 (SIO.25) is connected to PC FTDI USB_DTR line, via the J10 header connector:
By default a Jumper is fitted into J10 header connector to allow PC (using uWTerminal) to control
nAutoRUN pin (SIO.25); with no jumper fitted to J12 (which is the default) (see Error! Reference source not
found.).
To disconnect RM1xx nAutoRUN pin6 (SIO.25) from the PC FTDI USB_DTR line:
7.7.
Remove Jumper from J10 header connector. Then nAutoRUN can be controlled by J12 jumper on
appropriate pins as per above table.
Mounting Hole for LoRa Dipole Antenna
The mounting hole for the LoRa Dipole Antenna is illustrated in Figure 1 and Figure 2.
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8
SOFTWARE
The development board connects the RM1xx module to a virtual COM port of a PC or other device. From a PC,
you can communicate with the module using Laird’s UW Terminal application. (version 6.51 or newer).
UW TerminalX is a terminal emulation application capable of running on Windows, Mac, and Linux. It was
developed specifically to aid development and testing of Laird modules. It allows connection to serial devices
using any combination of the communications parameters listed in Table 4.
Table 4: UwTerminalX Communication Parameters for RM1xx
COM Port:
1 to 255
Baud rate:
300 to 921,600
Note: Baud rate default is 115200 for
RM1xx.
Parity:
None, Odd, Even
Data Bits:
8
Stop Bits:
1 or 2
Handshaking:
None or CTS/RTS
Note:
Baud rates higher than 115200 depend on the COM port capabilities of the host PC and may require
an external USB – RS232 adapter or PCMCIA card.
The benefits of using UWTerminalX include:
Continually displayed status of DSR, CTS, DCD, and RI
Direct control of DTR on the host PC via a check box
Direct control of RTS, if CTS / RTS Handshaking is disabled when UWTerminalX is launched
Sending of BREAK signals
BASIC tab provides standalone testing and development of smartBASIC applications and allows
UWTerminalX operation to be automated.
Additional built-in features (right click in Terminal tab screen) to accelerate development including
Automation and various XCompile / Load / Run options for downloading smartBASIC applications into the
RM1xx.
Note:
Full details on smartBASIC are available in the smartBASIC User Manual available for download at the
Laird website. This document also includes a basic introduction to UwTerminalX.
Tip:
If the module returns a four hex digit error code: In UwTerminal, select those four digits, right-click,
and select Lookup Selected ErrorCode. A description of the error is printed on screen.
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9
BREAKOUT CONNECTOR PINOUTS
9.1.
J28(J13, J14), J29, J1 (J3, J4, J5, J9), J12(J10), J6 SIO (Special Input / Output
Sockets) Breakout Connectors
Access to all 14 RM1xx series module signal pins (SIO’s = signal Input /Output) is available on header connectors
J28(J13, J14), J29, J1 (J3, J4, J5, J9), J12(J10), J6 (2.54 mm pitch headers).
Note:
The RM1xx module signal pins designation SIO (Signal Input /Output).
DEFAULT type is DIO (Digital Input or Output) or UART (on fixed pins)
ALTERNATE type is either AIN (Analog Input ADC), I2C, SPI, DIO (on fixed pins)
Alternate function is selectable in smartBASIC application
DIO or AIN functionality is selected using the GpioSetFunc() function in smartBASIC
AIN configuration selected using GpioSetFunc() function
I2C, UART, SPI controlled by xxxOPEN() functions in smartBASIC
SIO_21 to SIO_24 are DIO by default when $autorun$ app runs on power up
These breakout connectors can interface to a wide array of sensors with the RM1xx function user configurable
by smartBASIC application script from the default function (DIO, UART) to alternate functions (AIN (ADC), I2C,
SPI, DIO). The RM1xx development kit incorporates additional fly-lead cables inside the box, to enable simple,
hassle-free testing of the multiple interfaces.
Table 5 shows the RM1xx module pins that are brought out to plated through Holes (suitable for 2.54 mm pitch
headers).
Table 5: Module pins exposed by plated through holes
J28
Plated Through Holes or Header Connector
RM1xx pin plated holes for access
RM1xx module signals exposed
RM1xx pin plated holes for access
SI0_ 25,
SI0_ 28,
SI0_ 29,
SI0_ 30,
NOPOP (PIN HEADER,2.54mm 1X4P)
1
2
3
4
1
2
3
4
SIO_25
SIO_28
SIO_29
SIO_30
J28
J29
SIO_6
SIO_5
SIO_4
IO_Expander_MOSI_SIO_3
IO_Expander_MISO_SIO_17
IO_Expander_SCK_SIO_0
1
2
3
4
5
6
RM1xx pin plated holes for access
SI0_ 6,
SI0_ 5,
SI0_ 4,
SI0_ 3,
SI0_ 17,
SI0_ 0,
J29
1
2
3
4
5
6
NOPOP (PIN HEADER,2.54mm 1X6P)
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Plated Through Holes or Header Connector
RM1xx module signals exposed
Serial Port plated holes for access
J1
VCC_IO_UART
GND
USB_CTS
VCC
USB_TX
USB_RX
USB_RTS
GND
RTS
VCC GND
RX
TX
CTS
R1
NOPOP (0R)
J1
1
1
2
3 2
4 3
5 4
6 5
6
SIO_23
SIO_22
SIO_21
SIO_24
NOPOP (PIN HEADER,2.54mm 1X6P)
FTDI (USB to TTL 232 Cable)
J6
J6
2
2
1
SI0_ 28
Can be used to ground SIO_28
No Jumper on SIO_28
R14 560R
1
SIO_28
PIN HEADER,2.54mm 1X2P
GND
J3
R2
10K
J4
J3 Routes SIO_23 (RTS) to FTDI CTS
or disconnects.
VCC_IO_UART VCC_IO_UART
R3
10K
Default: J3 Jumper fitted.
1
USB_CTS
J3
1
2
2
J4 Routes SIO_21 (TX) to FTDI RX or
Arduino TX
R6 560R
SIO_23
Module_RTS
PIN HEADER,2.54mm 1X2P
Default: J4 Jumper fitted pin2-3.
2
J4
PIN HEADER,2.54mm 1X3P
1
D1_TX
3
1
2
J5
3
USB_RX
VCC_IO_UART VCC_IO_UART
R9 560R
J5 Routes SIO_24 (CTS) to FTDI RTS
or disconnects
SIO_21
Module_TX
J9
R10
10K
R11
10K
Default: J5 Jumper fitted.
1
USB_RTS
J5
1
2
2
R12 560R
J9 Connects SIO_22 (RX) to FTDI TX
or Arduino RX
SIO_24
Module_CTS
PIN HEADER,2.54mm 1X2P
Default: J9 Jumper fitted pin2-3.
R19
10K
R21 560R
Module_RX
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VCC_IO_UART
2
J9
PIN HEADER,2.54mm 1X3P
1
D0_RX
3
1
2
USB_TX
3
SIO_22
Module_RX
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Plated Through Holes or Header Connector
RM1xx module signals exposed
Connects SIO_25 (nAUTORUN) to
FTDI DTR
J10
VCC_IO_UART
n_Autorun /
module_DSR
R25
10K
Module_DSR 1
USB_DTR
1
2
2
SIO_25
J10
PIN HEADER,2.54mm 1X2P
VCC_IO_UART
3
3
R29
10K
2
1
2
1
J12
PIN HEADER,2.54mm 1X3P
R31
10K
Develop:
Jumper J12 pin2-3
nAUTORUN: Jumper J12 pin2-1
GND
Line driven by USB_DTR: No jumper in J12 (Default)
Line driven by USB_DTR: J10 jumper fitted (Default)
J13
,
J14
2
2
J13 Routes SIO_29 (I2C SCL) to
J13
PIN HEADER,2.54mm 1X3P
Coulomb Counter or Arduino SCL
3
1
pin.
3
1
SCL_ARD
Coulomb_I2C_SCL
Coulomb_I2C_SDA
SIO_29
SIO_30
SDA_ARD
3
J7
2
2
I2C_SCL: J13 jumper fitted pin2-3 (Default)
I2C_SDA: J14 jumper fitted pin2-3 (Default)
1
J14 Routes SIO_30 (I2C_SDA) to
Coulomb Counter or Arduino SDA
J14
PIN HEADER,2.54mm 1X3P
pin.
3
1
Button2: J7 jumper fitted pin2-3 (Default)
3
3
BUTTON2
2
2
J7
PIN HEADER,2.54mm 1X3P
Temp_Sens
1
1
SIO_5
J7 routes SIO_5 out .
Connects BUTTON2 or Temp Sensor
to SIO_5
C5
0.1uF,16V
GND
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Plated Through Holes or Header Connector
RM1xx module signals exposed
J8 Connects SIO_6 to LED5 or Analog
Input Buffer
J8
3
3
A0_div ided
2
2
J8
PIN HEADER,2.54mm 1X3P
LED5
1
1
SIO_6
LED5: J8 jumper fitted pin2-1 (Default)
9.2.
Additional Peripherals / Sensors
The RM1xx development board provides for simple and hassle free connectivity to a wide range of sensors, but
also includes several on-board sensors and options to enable a developer to test functionality straight out of the
box.
In the smartBASIC application code written to use sensors on the development board (including the
Temperature sensor (U1) – analog output, LED5(D5), Button1(SW1), SPI IO expander (U2), I2C Coulomb Counter
(U4), the SIO pins direction and type must be set in the smartBASIC application to override the defaults in the
RM1xx firmware.
For more information on these sample applications, see the Sample Applications for the RM1xx application note,
available on the documentation tab of the RM1xx product page.
9.3.
Arduino Connector for plugging in an Arduino Shields
The DVK-RM1xx-V1 development board is NOT an Arduino Shield, but is an Arduino base board (like the
Arduino UNO).
The four Arduino connectors (J30, J31, J32 and J33) on the development board allow Arduino Shields to be
plugged in.
All Arduino connector signals are brought out to Plated-through Holes (2.54mm pitch) J15, J16, J22, J23.
This allows any Arduino connector signal (D0-D13 or A0-A5) to be connected to any RM1xx module using fly
leads for maximum flexibility.
Arduino connectors orientation are at 90 degrees perpendicular to the long dimension, allowing larger
Arduino Shields to hang off side of the board without interfering with a mounted external antenna or the
RM1xx module (the BLE chip antenna).
There are Arduino pins that are not used on the development board:
Arduino pin IOREF on development board (on J33pin2), is connected to 3.3V domain (VCC_ARD_ARD via 0R
resistor (R44). Arduino IOREF allows Arduino shields to adapt to the voltage provided from the board,
Since we are sending 3.3V up (from the development board) to the IOREF , the Arduino documentation
states that a properly configured Shield should respect our logic levels as a function of this pin. Therefore
we do not need level translators, just series resistors in all Shield IO lines to help protect against an
inappropriate logic level (something greater than 3.3V). This series of resistors (R37, R38, R39, R40, R42,
R41, R14, R6, R9, R12, R21), provide the voltage drop as current flows through, activating the ESD
protection diode in the RM1xx module.
RM1xx module PINS DO NOT SUPPORT 5V IO. Do not connect greater than 3.3V IO from Arduino Shields
others.
Arduino RESET pin on development board (on J33pin3), is connected to RM1xx nRESET pin (U5pin22 via 0R
resistor (R43).
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Arduino pins A1 through to A5 are simply left open but are wired out from Arduino connector J31 to
Plated-through Holes on J16. These Arduino pins (A2-A5) can be fly-leaded to any RM1xx analog input pin.
Arduino D2-D9 are simply left open but are wired out from Arduino connector J30 and J32 to plated
through holes on J15 and J22 respectively next to the Arduino shield connectors. These Arduino pins (D2D9) can accessed by soldering a jumper wire to plated through holes on J15, to any RM1xx digital pin.
Arduino AREF is simply left open but is wired out from Arduino connector J32 to plated through holes on
J22 which is next to the Arduino shield connector (J32). AREF is supplied by a Shield board and is an input to
the Arduino base board to indicate the maximum expected value of the analog signal. The RM1xx module
does not support this function.
Table 6: Arduino connectors and signals
J#
J30
Arduino Connectors and Plated Through Holes (Test points)
RM1xx pin plated holes for access
D0_RX
D1_TX
D2
D3
D4
D5
D6
D7
1
2
3
4
5
6
7
8
D0(RX)
D1(TX)
D2
D3
D4
D5
D6
D7
J30
1
2
3
4
5
6
7
8
D0_RX
D1_TX
D2
D3
D4
D5
D6
D7
HEADER,FEMALE,2.54mm,1X8P
J29
A0_5V_IN 2
J17
2
1
1
1
2
3
4
5
6
7
8
Arduino signals
Arduino female header J30.
J15 is plated through holes for
access signals on J30
J15
1
2
3
4
5
6
7
8
NOPOP (PIN HEADER,2.54mm 1X8P)
HEADER,FEMALE,2.54mm,1X6P
6
6
A5
A5
5 6
5 6
A4
A4
5
4
4 5
A3
A3
3 4
3 4
A2
A2
2 3
2 3
A1
1 2
A1
1 2
A0
1
1
A0
J31
J16
NOPOP (PIN HEADER,2.54mm 1X6P)
A5
A4
A3
A2
A1
A0
PIN HEADER,2.54mm 1X2P
Arduino female header J31.
J16 is plated through holes for
access signals on J30.
J17 Connects Arduino A0 pin to
Analog Input Buffer (U3).
J17 jumper fitted (Default)
560R
2
2
J18
PIN HEADER,2.54mm 1X3P
1
SIO_4
3
3
Enable IO expander:
J18 Jumper in pin2-3 (default)
J20 jumper fitted (Default)
IO_Expander_CS_SIO_4
J21 jumper fitted (Default)
J24 jumper fitted (Default)
R37
R38 560R
IO_Expander_MOSI_SIO_3
1
J32
J22
J20
J24
J21
J20
2
2
1
1
PIN HEADER,2.54mm 1X2P
R39 560R
2
IO_Expander_MISO_SIO_17
J24
2
1
1
PIN HEADER,2.54mm 1X2P
R40 560R
IO_Expander_SCK_SIO_0
J21
2
2
1
1
PIN HEADER,2.54mm 1X2P
R42 560R
D8
D9
D10(SS)
D11(MOSI)
D12(MISO)
D13(SCLK)
GND
AREF
SDA
SCL
HEADER,FEMALE,2.54mm,1X10P
1
D8
2
D9
D10_SS 3
D11_MOSI 4
5
D12_MISO
6
D13_SCLK
7
GND
AREF 8
9
SDA
10
SCL
J32
D8
D9
D10_SS
D11_MOSI
D12_MISO
D13_SCLK
1
2
3
4
5
6
7
8
9
10
AREF
SDA
SCL
1
2
3
4
5
6
7
8
9
10
J22
1
2
3
4
5
6
7
8
9
10
NOPOP (PIN HEADER,2.54mm 1X10P)
GND
SDA_ARD
R41 560R
SCL_ARD
J33
VIN_12V_ARD
HEADER,FEMALE,2.54mm,1X8P
8
VIN_12V_ARD 8
VIN_12V_ARD
VIN
7 8
7 8
VCC_3V3_ARD
VCC_5V_ARD
GND
6 7
6 7
GND
5 6
5 6
VCC_5V_ARD
VCC_5V_ARD
5
5.0V
4
VCC_3V3_ARD
VCC_3V3_ARD 4 5
3 4
3.3V
3 4
nRESET/SWDIO 0R R43
nRESET
nRESET
2 3
2 3
IOREF
IOREF
nRESET
1 2
1 2
IOREF
1
1
R44
SPARE
J33
0R
J23
GND
NOPOP (PIN HEADER,2.54mm 1X8P)
VCC_3V3_ARD
GND
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Arduino female header J32.
J22 is plated through holes for
access signals on J30.
Connects SIO_4 (SPI SS) to I/O
Expander (U2) or to Arduino D10
(for use as SPI Slave Select).
J20 Connects SIO_3 (SPI MOSI)
to Arduino D11. J20 Jumper
fitted.
J24 Connects SIO_17 (SPI MISO)
to Arduino D12. J24 Jumper
fitted.
J21 Connects SIO_0 (SPI SCK) to
Arduino D13. J21 Jumper fitted.
Arduino female header J33.
J23 is plated through holes for
access signals on J33.
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9.3.1. Analog input Buffer and attenuator circuit (U3)
Figure 8 shows the Analog Buffer circuit that accepts a 0V to 5V analog input signal from Arduino shield pin and
scale it down to an acceptable range of 0V to 1.2V set by potential divider R26 (3.3kOhms) and R28 (1KOhms)
with a gain of 0.23(=1/ (1+3.3)).
Max Input (Volts) (A0_5V_IN)
5
R26 (kOhms)
3.3
R28 (kOhms)
1
Output (Volts) (A0_divided)
1.16
VCC_5V_ARD
R18
NOPOP (1K)
GND
R78
1R,1%
C4
0.1uF,16V
R20
1K
GND
U3
1
2
3
4
R22
A0_5V_IN
470R,1%
R24
100K
OUT A
V+
IN A- OUT B
IN A+
IN BVIN B+
8
7
6
5
A0_div ided
R23
1K
Dual OP,5V
GND
GND
R28
R26
3.3K,1%
1K
GND
Analog 5V to 1.2V level translator
Figure 8: Analog Buffer
9.3.2. Temperature Sensor
The temperature sensor (U1) by default is not connected to the RM1xx module, as jumper is fitted to J7 pins 2-3.
The temperature sensor (U1) can be connected by moving jumper from J7 pins 2-3 to J7 pins 1-2, bridging
TEMP_SENS and SIO_5.
3
3
BUTTON2
2
2
J7
PIN HEADER,2.54mm 1X3P
VCC_3V3
4
1
Temp_Sens
R4
U1
1
SIO_5
C2
0.1uF,16V
C5
0.1uF,16V
V+
Vo
GND
5
GND NC
3
Temp_Sens
470R,1%
2
R5
NOPOP (4.7K)
1
C3
0.1uF,16V
2.4V,10uA,-55dC~+130dC
GND
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Figure 9: Temperature Sensor
The on-board temperature sensor (TI LM20BIM7 - www.ti.com/lit/ds/symlink/lm20.pdf) has an Analogue output
that can be connected to RM1xx module pin SIO_5; but since the LM20BIM7 has an analogue output, the RM1xx
module SIO_5 digital pin (DIO) must be configured as AIN analogue input (ADC). To configure the SIO_5 pin from
DIO pin to Alternate function AIN, see the example file “tempsens.rm1xx.sb” in the RM1xx sample applications
library: https://github.com/LairdCP/RM1xx-Applications.
Key specifications of the LM20BIM7 are as follows in Table 7.
Table 7: LM20BIM7 Specifications
Output type
Analogue output
Accuracy at 30ºC
±1.5ºC ±4ºC (max)
Accuracy at 40ºC to +85ºC
approx. ±2.5ºC ±5ºC (max)
Power supply voltage range
+2.4 V to 5.5 V
Current Drain
10 uA (max)
Output impedance
160 Ohms (max)
The LM20BIM7 datasheet states the relationship of Temperature (T) to Voltage output (Vo) can be
approximated as a linear equation (for temperature range of -40ºC to +85ºC):
Vo(mV) = -11.79mV/ºC x T + 1858.3
gives below calculated Vo versus temperature:
Table 8: LM20BIM7 Temperature to Voltage Output relationship
Temperature (T)
+80ºC
Typical Vo
+924.7mV
+70ºC
+1041.4mV
+60ºC
+1158.1mV
+50ºC
+1274.8mV
+40ºC
+1391.5mV
+30ºC
+1508.2mV
+20ºC
+1624.9mV
+10ºC
+1741.6mV
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Temperature (T)
+0ºC
Typical Vo
+1858.2mV
-10ºC
+1975.0mV
-20ºC
+2091.7mV
-30ºC
+2208.4mV
9.3.3. I2C sensor (Coulomb Counter)
The I2C Coulomb Counter (U4) senses the current drawn by RM1xx VCC pins via sense resistor R30. By default, it
is bypassed with jumper fitted in J11 pins 1-2. To connect the coulomb counter to RM1xx VCC pins (namely
VCC_BLE pin 12 and VCC_LORA pin 13) you must fit a jumper to J11 pins 2-3. The output of the coulomb counter
is on the I2C bus and is by default connected to the RM1xx module via jumpers on J13 pins 2-3 and J14 pins 2-3.
Bypass Coulomb Counter:
Jumper J11 pin2-1 (default)
VCC_BLE
2
2
J11
PIN HEADER,2.54mm 1X3P
1
3
SB1
1
3
2
2 1
R30
NOPOP (Solderbridge)
VCC_LORA
SB2
2
1
2 1
7
6
AL/CC
SDA
SCL
GND
GND
5
4
3
2
VCC_IO_UART
TP2
NOPOP (TH_TEST_POINT)
1
GND
Coulomb Counter
V+ 2.7V-3.6V
R32
10K
R33
10K
J13
PIN HEADER,2.54mm 1X3P
3
1
3
1
2
GND
GND
NOPOP (Solderbridge)
2
SENSE+
C7
0.1uF,16V
U4
BAT-Gauge,I2C
SENSE-
1
1R,1%
SCL_ARD
Coulomb_I2C_SCL
Coulomb_I2C_SDA
SIO_29
SIO_30
SDA_ARD
2
I2C_SCL: J13 jumper fitted pin2-3 (Default)
I2C_SDA: J14 jumper fitted pin2-3 (Default)
3
3
2
VCC_Radio
1
1
1
J14
PIN HEADER,2.54mm 1X3P
Figure 10: Coulomb counter schematic
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Figure 11: I2C sensor - Coulomb Counter
The Coulomb Counter measures current taken over time and outputs this as I2C data. For a working example,
see the file ltc2941.sb in the smartBASIC sample application library:
https://github.com/LairdCP/RM1xx-Applications.
9.3.4. SPI IO Expander and connected Push Button and LEDs on IO expander
The SPI IO Expander (U2) is connected to the RM1xx SPI pins directly. The 3-pin header J18 connects SIO_4 (SPI
SS) to I/O Expander or to Arduino D10 (for use as SPI Slave Select). By default, the RM1xx Module SIO_4 (used as
the SPI SS) is connected to I/O Expander (U2) slave select line via J8 with a jumper fitted on J18 pins 2-3. Table 9
lists signal mappings for all four LEDs and the push button of IO Expander.
Table 9: IO Expander signal mappings
Part
LED1 (D1)
SIO
SPI IO expander (U2)pin9 GP0
LED2 (D2)
SPI IO expander (U2)pin10 GP1
LED3 (D31)
SPI IO expander (U2)pin11 GP2
LED4 (D4)
SPI IO expander (U2)pin12 GP3
Button 1 (SW1)
SPI IO expander (U2)pin13 GP4
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J35
3
NOPOP (PIN HEADER,2.54mm 1X3P)
3
BUTTON1
VCC_IO
LED4
C1
2
2
1
VCC_IO
LED2
R8
10K
R7
10K
GND
GND
SPI Expander,8Bit
2
3
2
1
BUTTON1
LED4
LED3
J2
NOPOP (PIN HEADER,2.54mm 1X3P)
BUTTON1
LED4
LED4
LED3
LED3
LED2
LED2
LED1
IO_Expander_CS_SIO_4
LED1
LED1
BUTTON1
GND
2
LED1
LED2
U2
GP6
GP5
GP4
GP3
GP2
15
14
13
12
11
1
A2/MISO
A1
A0
RESET
CS
GND
3
20
19
18
17
16
IO_Expander_MISO_SIO_171
2
3
4
5
VCC_IO VCC_IO
21
R70
0R
R71
0R
NOPOP (PIN HEADER,2.54mm 1X2P)
J26
NC6 SDA/MOSI
SCL/SCK
INT
VDD
NC8
VSS
GP0
GP7
GP1
R72
NOPOP (0R)
6
7
8
9
10
R73
NOPOP (0R)
IO_Expander_SCK_SIO_0
IO_Expander_MOSI_SIO_3
2
1
0.1uF,16V
1
LED3
1
GND
R35
1K
C10 0.1uF,16V
R15
1K
R16
1K
R13
1K
R17
1K
D3
Blue,0603
D4
Blue,0603
SW1
TACT SW,SMD/180d
3
4
1
D2
Blue,0603
1
2
1
D1
Blue,0603
2
2
2
2
1
2
1
1
3
4
GND
GND
GND
GND
GND
GND
Figure 12: IO Expander schematic
Figure 13: SPI IO Expander and connected Push button and LEDs
For a working example of the IO Expander in use, see the file ioexpander.rm1xx.sb in the smartBASIC sample
applications library: https://github.com/LairdCP/RM1xx-Applications
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9.3.5. Push Button and LED connected to RM1xx
BUTTON2
BUTTON2
The selection jumper on J7 connects either BUTTON2 or the analog Temp Sensor to SIO_5. Fit the jumper on J7
to short pins 2-3 to connect BUTTON2 to SIO_5.
R27
1K
C6 0.1uF,16V
3
BUTTON2
3
2
2
J7
PIN HEADER,2.54mm 1X3P
1
2
1
1
2
SIO_5
Temp_Sens
1
SW2
TACT SW,SMD/180d
Button2: J7 jumper fitted pin2-3 (Default)
3
4
3
4
GND
C5
0.1uF,16V
GND
GND
Figure 14: J7 Jumper
The button (BUTTON2) has no external pull-up resistor, so to use the button, the SIO_5 pin must be configured
as an input with internal pull-up resistor, such as a smartBASIC line that configures the pull-up:
rc = GPIOSETFUNC(5,1,4):
strong pull up
'//sets sio5 (Button2) as a digital in,
9.3.6. LED and Analog Buffer Connected to RM1xx
The selection jumper on J8 connects either LED5 or the output of the Arduino analog input buffer to SIO_6. By
default, LED5 is selected. To select the Arduino analog input buffer to SIO_6, fit the jumper on J7 to short pins
2-3.
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LED5
LED5
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User Guide
R36
1K
3
1
A0_div ided
3
D5
Blue,0603
2
2
J8
PIN HEADER,2.54mm 1X3P
LED5
GND
1
2
1
SIO_6
LED5: J8 jumper fitted pin2-1 (Default)
Figure 15: J8 Jumper
10
OTHER FEATURES
10.1. Current Consumption Measurement
A removable jumper (on J11) is provided to break the power supply line directly to the module, allowing you to
measure current consumption. For normal operation, jumper on J11 between pin1 and pin2 must be fitted (and
is fitted by default).
IMPORTANT:
Note:
To achieve the optimal power consumption of the RM1xx series module on the development
board, see the “LowPower.SB” file in the smartBASIC sample application library on RM1xx
product pages at https://github.com/LairdCP/RM1xx-Applications.
This measures the current consumption of the RM1xx series module ONLY.
The current drawn by the RM1xx series module can be monitored on the development board by bypassing the
coulomb counter circuitry. Figure 16 and Figure 17 show the schematic (and location of measuring points on
PCB) related to current measurements.
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VCC_IO_UART
VCC_IO
R45
0R
R46
0R
VCC_Radio
R47 NOPOP (0R)
TP5
NOPOP (TH_TEST_POINT)
SB3
NOPOP (Solderbridge)
1
1
1
2
J34
2
2
2
1
1
PIN HEADER,2.54mm 1X2P
R52
0R
R53
0R
GND
R54 0.51R,1%
OUT IN-
U7
CurrentShuntMonitor,100V/V
TP6
TP7
NOPOP (TH_TEST_POINT) NOPOP (TH_TEST_POINT)
GND
1
1
B2
GND
GND IN+
0.1uF,16V
B1
C17
A2
A1
R56 0.51R,1%
I(mA)=(Vmeas(mV)/25.5
GND
Bypass Coulomb Counter:
Jumper J11 pin2-1 (default)
VCC_BLE
2
2
J11
PIN HEADER,2.54mm 1X3P
1
3
SB1
1
3
2
2 1
VCC_Radio
R30
1R,1%
1
NOPOP (Solderbridge)
VCC_LORA
SB2
2
1
2 1
NOPOP (Solderbridge)
Figure 16: Current measurement schematic
Figure 17: Current measurement design and component location
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There are two primary ways to measure the current consumption:
Using Ammeter – Connect an ampere meter between the two pins of J11 pins 1-2. This monitors the
current directly.
Using Oscilloscope – Mount a resistor across J11 pins 1-2. The resistor should not be larger than 10 Ohm.
Connect an oscilloscope or similar with two probes on the pins on the J11 connector and measure the
voltage drop. The voltage drop is proportional with current consumption. If a 1 Ohm resistor is chosen, 1
mV equals 1mA.
There is also a third way to measure current:
Using Current Shunt Monitor – The current drawn by the RM1xx module can be monitored using the
Current Shunt Monitor (CSM), INA216 (U7). The gain of INA216 is 100 V/V for lowest possible drop voltage.
Note:
Using the current shunt monitor method allows the dynamic current consumption waveforms on
oscilloscope as the RM1xx radio operates. This can provide insight into power optimization.
Current consumed by the RM1xx series module is measured as a voltage (that is proportional to the current)
using the current shunt monitor (U7). This is performed by connecting a voltmeter or oscilloscope to TP6 and
also the ground to TP7. Current in milliamps can be determined from the following equation:
I(mA) = Vmeas_TP6(mV) /25.5
CAUTION:
Take care not to short TP7 (the Current Shunt Monitor IC (U7)) output to GND, as that will
permanently damage the IC U7.
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11
ADDITIONAL DOCUMENTATION
Laird offers a variety of documentation and ancillary information to support our customers through the initial
evaluation process and ultimately into mass production. Additional documentation can be accessed from the
Documentation tab of the Laird RM1xx Product Page.
User Guide – smartBASIC Core Functionality
User Guide – smartBASIC RM1xx Extensions
RM1xx – smartBASIC sample applications library
Application Note – Firmware Upgrade Application note
Application Note – Sample Applications for the RM1xx
Application Note – Using BLE and LoRa on the RM1xx
Application Note – Interfacing with the RM186
Application Note – Interfacing with the RM191
Application Note – Connecting to a Kerlink Gateway
Application Note – Connecting to a Multitech Conduit Gateway
Application Note – Using an I2C GPS Sensor with the RM1xx
Application Note – Using a LCD Keypad Shield with the RM1xx
Application Note – Using UwTerminal with the RM1xx
Application Note – Connecting to the Semtech Website
For any additional questions or queries, or to receive technical support for this Development Kit or for the
RM1xx module series, please contact the Embedded Wireless Solutions Support Center: http://ewssupport.lairdtech.com.
© Copyright 2016 Laird. All Rights Reserved. Patent pending. Any information furnished by Laird and its agents is believed to be accurate and reliable. All
specifications are subject to change without notice. Responsibility for the use and application of Laird materials or products rests with the end user since
Laird and its agents cannot be aware of all potential uses. Laird makes no warranties as to non-infringement nor as to the fitness, merchantability, or
sustainability of any Laird materials or products for any specific or general uses. Laird, Laird Technologies, Inc., or any of its affiliates or agents shall not be
liable for incidental or consequential damages of any kind. All Laird products are sold pursuant to the Laird Terms and Conditions of Sale in effect from
time to time, a copy of which will be furnished upon request. When used as a tradename herein, Laird means Laird PLC or one or more subsidiaries of Laird
PLC. Laird™, Laird Technologies™, corresponding logos, and other marks are trademarks or registered trademarks of Laird. Other marks may be the
property of third parties. Nothing herein provides a license under any Laird or any third party intellectual property right.
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