Usage Example for FireBeetle 2 ESP32-E - CAN Data Transmission via UART

Hardware Preparation:

• TEL0150 Gravity: CAN to TTL Communication Module ×2
• DFR0654 FireBeetle_Board_ESP32_E ×1
• FIT0668 Type-C&Micro 2-in-1 USB Cable ×2

Connection Diagram:

Sample Code:

void setup()
{
  Serial1.begin(115200, SERIAL_8N1, /*rx =*/D3, /*tx =*/D2); 
  delay(10); //Give a delay to ensure that the previous setup instruction is completed
  Serial1.println("S3\r"); //Set the CAN baud rate to 100kbits/s
   //delay(10); //Give a delay to ensure that the previous setup instruction is completed
  Serial1.println("O\r"); //Turn on CAN communication 
}

void loop()
{
  Serial1.println("t11123333\r"); 
  delay(1000);
}

Operation Steps:

Connect the module to the FireBeetle Board ESP32-E following the wiring diagram shown above.

Open the Arduino IDE and upload the code to the FireBeetle Board ESP32-E.

Open another serial assistant and select the corresponding serial device for the module. In the serial assistant, send "S3" to set the CAN baud rate to 100 kbits/s. Then, send the command "O" to activate CAN communication. You will then be able to receive the data "t11123333" in the serial assistant.

Note: The baud rate of the module's UART interface needs to match the baud rate selected in the serial assistant.

Result