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COMMU Module Extend RS485/TTL CAN/I2C Port

SKU:M011

Regular price $11.39
Standard Shipping Estimated Delivery Time: 7-20 days
Description

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
Documents

Datasheet

Learn

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\<user_name>\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 <M5Stack.h>
#include <mcp_can.h>
#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 <M5Stack.h>
#include <mcp_can.h>
#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);

More information

PinMap

CAN ESP32 Chip
CAN_CS GPIO12
CAN_INT GPIO15
CAN_SCK GPIO18
CAN_MISO GPIO19
CAN_MOSI GPIO23
I2C Interface ESP32 Chip
IIC_SDA GPIO21
IIC_SCL GPIO22

Schematic

Customer Reviews

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D
D.R.
MicoPython and the M5Stack beats all the other Microprocessors

I have programed Pi's, M0's, M4's and by far, the M5Stack beats them all combined....
Today I gave up my long awaited chance to buy the "fully loaded" Pi-4 to concentrate on bringing the pocket M5Stacks into our operations of industrial control testing and troubleshooting.
Thank you for being the Microprocessor leader that allows us to "Do It Our Way" in measurements, logging, control testing and troubleshooting
David
Industrial Controls Engineer
Controls Division
Service Solutions Incorporated

C
C.W.

COMMU Module Extend RS485/TTL CAN/I2C Port

S
S.C.

COMMU Module Extend RS485/TTL CAN/I2C Port

A
A.K.

COMMU Module Extend RS485/TTL CAN/I2C Port

B
B.W.

COMMU Module Extend RS485/TTL CAN/I2C Port

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