Datasheet

Module COMMU

Description

Product Features

2x I2C Interface

1x CAN Interface

1x RS485 Interface

1x TTL Interface

CAN controller: MCP2515-1/SO

RS485 Transceiver: SP3485EN-L/TR

Product Size：54.2mm x 54.2mm x 12.8mm

Product weight：13.5g

Include

1x M5Stack COMMU Module

PinMap

CAN ESP32 Chip

CAN_CS GPIO12

CAN_INT GPIO15

CAN_SCK GPIO18

M5Stack Docs

CCOMMU 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.

Be care about TTL Interface. It is a UART Interface actually by default. But you can switch it to connect with

UART2 after changed those jumpers(J6, J7, J9, J10).

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M5Stack Docs Module COMMU 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. Be care about TTL Interface. It is a UART Interface actually by default.
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M5Stack Docs CAN ESP32 Chip CAN_MISO GPIO19 CAN_MOSI GPIO23 I2C Interface ESP32 Chip IIC_SDA GPIO21 IIC_SCL GPIO22 EasyLoader 1.EasyLoader is a simple and fast program burner. Every product page in EasyLoader provides a product-related case program. It can be burned to the master through simple steps, and a series of function verification can be performed.(Currently EasyLoader is only available for Windows OS) 2.
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M5St 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:upload the two project to two M5Cores separatly. The below code is incomplete(just for usage). arduino /* commu_can_transmitter.ino */ #include #include #include "m5_logo.
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M5Stack Docs RS485 communication This is a COMMU example for RS485 communication. Burn example to two M5Cores. Then after pressed Button A, this two cores will send message to each other and receive data.