Draft: Added ECM support for SIMCom LPWA modems

Alexey Orishko requested to merge alor/ModemManager:simcom into main
  • Added ECM bearer support for SIMCom SIM70x0 LPWA modems in simtech plugin
    • If ECM is not supported it will fallback to ppp
    • ECM autoconnect enabled once and stored in NVM
    • APN is set by modem object via AT+CGDCONT.
    • PDP ctx authentication in ECM connectivity case is rarely set, most likely while using private networks with Radius server.
  • Added modem reset method in simtech plugin
Edited by Aleksander Morgado

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