Und im Constructor, also hier?
SoftwareSerial SIM7600SS = SoftwareSerial(GSM_TX, GSM_RX);
SoftwareSerial *SIM7600Serial = &SIM7600SS;
Und im Constructor, also hier?
SoftwareSerial SIM7600SS = SoftwareSerial(GSM_TX, GSM_RX);
SoftwareSerial *SIM7600Serial = &SIM7600SS;