I was also stumbled with this issue lately. I figured out that if we configure the USB to the internal RC48 clock, then we are able to use the HSI clock and if the system clock is also configured as HSI, the board can be powered with an external powe...
@Andrew Neil Thanks for sharing the link. It seems a lot of members are trying to interface STM controllers with modems.Yes, i approached Quectel and looks like it is a dead end. They have asked me to develop a driver ourselves.
Hello Nicolas, Were you able to figure out this? I am also trying to interface the STM32 with Quectel RM500Q and would like to know more about this topic. Thanks in advanceSundar.
