USART-5 on STM32 LoRa

[sgabran]

Hi

We are using the DISCO-L072CZ-LRWAN1.

USART-5 uses pin PB3 for Tx, is this pin not available on the LoRa development kit ?

Is there a way to re-route the USART-5 Tx pin or access it ?

thanks

[RhSilicon · Accepted solution]

UM2115:

The B-L072Z-LRWAN1 Discovery kit embeds the CMWX1ZZABZ-091 LoRa®/Sigfox™

module (Murata)

Apparently this pin (PB3) is not available:

https://www.mouser.com/catalog/specsheets/Murata_CMWX1ZZABZ-091.pdf

[Tesla DeLorean]

Once upon a time I made a post highlighting all the pins, but the forum transition seems to have destroyed that. There are about 3 escapable UART as I recall. You might have to split a UART to get both TX and RX from different ones.

There's a finite number of pins on the WLCSP and escaping from the Murata module.

PB3 is used internally for the Radio's SPI connection