GSM modules Quectel - PlatformIO, Arduino, ThreadX, OpenCPU ...
https://github.com/Wiz-IO/platform-quectel
Examples
https://github.com/Wiz-IO/platformio-quectel-examples
MQTT to Amazon
https://www.youtube.com/watch?v=T0Nt-NJTIaY&ab_channel=GeorgiAngelov