I plan to build up a LoRa GPS tracker with an RAK3172 module and custom firmware which is programmed in STM32CubeIDE. Because I want to use the LPUART for the GPS module to use UART-based wakeups I decided to use UART1 with the bootloader to upload the firmware.
Can I use this setup with your manual about using custom firmware concerning the different UART pins? If so is it possible to use this setup with one of my RAK3272S boards (RAK3172 SiP)?
It should work with the RAK3172-SIP but you are missing a number of features in the CubeIDE IOC config including the RF switches and the HSE clock. These are different between the RAK3172 and the RAK3172-SIP. The -SIP uses different RFSWITCH pins and I recall uses a TCXO. It is minor stuff to fix though.
thanks for the response. Okay so I understand it wrong because I thought the same limitations for the pins (i. e. capabilities for interfaces like PB6 for UART) are also used by the bootloader. But it looks different. I will change this! So be on the right page: I have to use PA9 (SCL and Bootloader TX) and PA10 (SDA and Bootloader TX)