ARDUINO GSM ROOM DOOR SECURITY MESSAGE & CALLING SYSTEM #trending
diagram wiring ;
https://drive.google.com/open?id=1pODgz5QKb7vzuHrny2syuwUFW_XrZzwd
gsm door security code ;
https://drive.google.com/open?id=1MPIQatOK3f3i2ymkKP1NzQ4E4X2xtLyi
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