@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.