SMS_V2 remote control

The changes made to the SMS_V2 version presented here are: Addition of a transistor driven by the CPU to carry out a reset of GSM at the starting of the object or following a failure of control of connection to the GSM network. The basic operation is identical to SMS V1. SMS texts and actions remain unchanged, code inconsistencies have been removed ? For user manual, see https://www.elektormagazine.com/labs/telecommande-par-sms-4-relais-et-temperature