Cant Do Serial and LoRaWAN on STM32WLE5JC (Seeed LoRa E5 Mini)

[rajSilikon]

Having Issues with Seeed Lora-e5 mini

STM32WLE5JC

I tried blinking an LED and fade an LED just to check if it communicates with the chip.

Blink LED and Fade LED works fine no issues.

but I cant do other than that, for example Serial Read / Write not working.
LoRaWAN code also not working.

Am I missing something or is there a bug?

[fpistm]

Hi @rajSilikon
by default, generic WLE5JC defined default Serial instance to be on:

Arduino_Core_STM32/variants/STM32WLxx/WL54JCI_WL55JCI_WLE4J(8-B-C)I_WLE5J(8-B-C)I/variant_generic.h

Lines 126 to 138 in 21dce35

	// UART Definitions
	#ifndef SERIAL_UART_INSTANCE
	#define SERIAL_UART_INSTANCE 101
	#endif
	// Default pin used for generic 'Serial' instance
	// Mandatory for Firmata
	#ifndef PIN_SERIAL_RX
	#define PIN_SERIAL_RX PA3
	#endif
	#ifndef PIN_SERIAL_TX
	#define PIN_SERIAL_TX PA2
	#endif

But based on this pinout:
https://files.seeedstudio.com/products/317990687/image/3001615286723_.pic_hd.jpg

It seems it should be PB6/PB7.
Before
Serial.begin(speed);
Add:

Serial.setRx(PB7);
Serial.setTx(PB6);

You should also consider to redefine the SystemClock_Config to configure the LSE.

[rajSilikon]

I was able to get serial to work using
Serial.setRx(PB7);
Serial.setTx(PB6);

Is LoRaWAN in Arduino IDE supported on this chip already?

Cant seem to get that to work

[fpistm]

Fine.
For LoRaWan, yes it could be supported thanks:
https://github.com/stm32duino/STM32LoRaWAN

Anyway, some config need to be updated. We will update the library to be able to redefine easily the rfswitch pins.
Like it was done for the RAK:
stm32duino/STM32LoRaWAN#7

[fpistm]

Fixed by #1997