Arduino for STM32

You have quite a few posts regarding serial operations. For STM32L432 board, the default Serial is actually mapped to the 2nd serial port of the chip. This port is wired to the on-board ST-link. You can then plug your PC to the USB-port of the ST-link and get Serial Monitor on Arduino IDE right away...

See this:
viewtopic.php?f=37&t=1316

Simply change your link from "master" to "main".

I have similar experience with my boards. The issue may suddenly come and go. I always suspect if that is related to the my 3rd party ST-Link devices. Moreover the connection failure rate associated with Cubeprogrammer is much higher than ST-Link utility. If I was in a hurry, I would press reset but...

The cell phone downloads the ephemeris/timing information from the server to get the predicated orbits of the satellites. By this approach it no longer needs to acquire/search the satellites. It just need to do tracking according to the prediction. The difference of acquisition/tracking sensitivity ...

Perhaps you can try further following the guidelines posted on Arducam.com:
https://www.arducam.com/docs/stm32-spi- ... ith-stm32/

package_index_stm.json of the board manager is meant for STM official core. 1.9.0 is a version of the official STM core. Latest one is verion 2.0.0. So what you have re-installed is absolutely not Roger's core but the STM core. Roger's core is installed by manually placing the files within Arduino l...

I also found problems using DFU mode to upload code, see my post:
viewtopic.php?f=7&t=1196

I used MCO to capture the HSI of my blackpill's and to my surprise:
HSI = 15.95MHz => DFU bootloader not recognized
HSI = 15.88MHz => DFU bootloader recognized

I am not going to mess with DFU bootloader further. I will always live with SWD uploading.

I normally upload codes via SWD but until recently when I attempted DFU uploading on STM32F4, I noticed the process was not reliable. I have 3 boards but not all of them could be recognized as ST bootloader. Even for the same board which was ok, the success rate was not 100%. A quick search tells me...

Interesting brain exercise. Thanks for sharing.