MIKROE-2736

        UV 3 click PID: MIKROE-2736 UV 3 click is an advanced ultraviolet (UV) light sensor with I2C protocol interface. The click carries VEML6070 UVA light sensor designed by the CMOS process. UV 3 click runs on either 3.3V or 5V power supply. VEML6070 sensor features VEML6070 is an advanced ultraviolet (UV) light sensor with I2C protocol interface and designed by the CMOS process. The active acknowledge (ACK) feature with threshold windows setting allows the UV sensor to send out a UVI alert message. VEML6070 incorporates a photodiode, amplifiers, and analog/digital circuits into a single chip. VEML6070’s adoption of Filtron™ UV technology provides the best spectral sensitivity to cover UV spectrum sensing. It has an excellent temperature compensation and a robust refresh rate setting that does not use an external RC low pass filter. VEML6070 has linear sensitivity to solar UV light and is easily adjusted by an external resistor. Specifications Type  Optical  On‐board  modules  VEML6070 UVA light sensor  Key Features  Converts solar UV light intensity to digital data, excellent performance of UV radiation  measurement under long time solar UV exposure  Key Benefits  Excellent UV sensitivity and linearity via Filtron™ technology  Interface  I2C  Input Voltage  3.3V or 5V  Click board  size  S (28.6 x 25.4 mm)  Pinout diagram This table shows how the pinout on UV 3 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes  Pin  Pin  Notes    NC  1  AN  PWM  16  NC  NC  2  RST  INT  15  ACK  NC  3  CS  TX  14  NC  NC  4  SCK  RX  13  NC  NC  5  MISO  SCL  12  SCL  I2C digital serial clock input  NC  6  MOSI  SDA  11  SDA  I2C digital serial data output   Power supply  +3.3V  7  3.3V  5V  10  +5V  Power supply  Ground  GND  GND  9  GND  Ground    Acknowledge pin            GND  8  Jumpers and settings   Designator  Name  JP1  Logic  level  Default  Position  Left  Default  Option  3.3V  Description  Data in level Voltage Selection 3V3/5V, left position  3V3, right position 5V  Programming Code examples for UV 3 click, written for MikroElektronika hardware and compilers are available on Libstock. Code snippet This code reads the value of UV light from VEML6070 and sends it to the user via UART. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 char uartTxt [20]; void systemInit() { Uart5_Init (9600); Uart5_Write_Text ("rnInitializing..."); I2C2_Init( 100000 ); Delay_ms (100); UV_3_initDriver (0x70,I2C2_Start, I2C2_Stop, I2C2_Write, I2C2_Read); VEML6070_Init(); Uart5_Write_Text ("rnInitialized"); } void main() { systemInit(); while( 1 ) { Uart5_Write_Text ("rnUV value: "); IntToStr (UV_3_read(), uartTxt); Uart5_Write_Text (uartTxt); Delay_ms (750); } }                                                                          https://shop.mikroe.com/uv‐3‐click 9‐6‐17