M011

  COMMU Module Extend RS485/TTL CAN/I2C Port SKU: M011 COMMU is a Muti-Communication-Interface-Converter. Integrated with 2IIC, 1TTL, 1CAN, 1RS485. Apparently COMMU has packed with most of series communications. Default connection: TTL - UART0, RS485 - UART2. Since ESP32 pin map is allowed for re-assign, you can re-assign or re-mapping the TTL or RS485 interface to other pins. Product Features       2x I2C Interface 1x CAN Interface 1x RS485 Interface 1x TTL Interface CAN controller: MCP2515-1/SO RS485 Transceiver: SP3485EN-L/TR Kit includes  1x M5Stack COMMU Module Example Arduino IDE CAN communication These are two COMMU examples for CAN communication, tansmitter and receiver. Press Button A to sent the message, and display the received message on the screen. Step 1: Copy MCP_CAN_lib file to C:\Users\\Documents\Arduino\libraries, Step 2: Open project file commu_can_transmitter.ino, and commu_can_receiver.ino Step 3: Compile and upload the two project to two M5Cores separatly. Below code is incomplete. If you want the complete code, please click here. /*      commu_can_transmitter.ino  */  #include   #include   #include "m5_logo.h"    #define CAN0_INT 15 // Set INT to pin 2  MCP_CAN CAN0(12);   // Set CS to pin 10    // declaration  byte data[8] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};    // initialization  M5.begin();  CAN0.begin(MCP_ANY, CAN_1000KBPS, MCP_8MHZ);  /* Change to normal mode to allow messages tobe transmitted */  CAN0.setMode(MCP_NORMAL);    // send data  CAN0.sendMsgBuf(0x100, 0, 8, data);  /*      commu_can_receiver.ino  */  #include   #include   #include "m5_logo.h"    #define CAN0_INT 15 // Set INT to pin 2  MCP_CAN CAN0(12);   // Set CS to pin 10    // declaration  byte data[8] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};    // initialization  M5.begin();  /* Initialize MCP2515 running at 16MHz with a baudrate of 500kb/s */  /* and the masks and filters disabled. */  CAN0.begin(MCP_ANY, CAN_1000KBPS, MCP_8MHZ);  /* Set operation mode to normal so theMCP2515 sends acks to received data. */  CAN0.setMode(MCP_NORMAL);  pinMode(CAN0_INT, INPUT);// Configuring pin for /INT input    // read data  CAN0.readMsgBuf(&rxId, &len, rxBuf);      PinMap CAN ESP32 Chip CAN_CS GPIO12  CAN_INT  GPIO15  CAN_SCK  GPIO18  CAN ESP32 Chip CAN_MISO  GPIO19  CAN_MOSI  GPIO23  I2C Interface ESP32 Chip IIC_SDA GPIO21  IIC_SCL  GPIO22  Schematic https://m5stack.com/products/commu‐module10‐2‐19