Problem using E220 library

[Fernando]

Hello, I am trying to use the E220 library for my LoRa E220-400T30D module, but when I use the “get_config” code, I get the error: “no response from device! (check wiring) 12 save mode returned not recognized! 11”. I have checked the wiring numerous times and powered the LoRa module with an external power source, sharing the ground connections. When I change the LoRa_E220 configuration from e220ttl(&Serial2, 18, 21, 19) to LoRa_E220 e220ttl(&Serial, 18, 21, 19), the code works. But why is this happening? I want to use Serial2 for this project, but I don’t understand why it works with Serial and not with Serial2. I have also tried using pull-up resistors and still get the same result. Please help.

• This topic was modified 1 year, 1 month ago by Fernando.

[Renzo Mischianti]

Hi Fernando,
sorry for the late response.

I think the problem can be that From core 2 to core 3, TX2 and RX2 pins are changed

Try to force the pin number
LoRa_E32 e32ttl100(16, 17, &Serial2, 15, 21, 19, UART_BPS_RATE_9600); // RX AUX M0 M1

Bye Renzo

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