hi guys i want to asking how arduino to read an sms , and send sms back to cellphone. i use df robot gsm shield V3 when i send L to gsm shield, it will receive the sms and send me back to my cellphone sms DATA1=10 but when i send H, gsm shield send me sms DATA1=10, it should send me DATA2=20. i w…

gsm dfrobot send and receive sms

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