Description: This Arduino code will interface Arduino uno board with sim900mini board, connected at Arduino pin 1 (5VR of GSM) and Arduino pin 0 (5VT of GSM). Pin Connection Arduino GSM 0 - 5VT 1 - 5VR 12 - Sensor 13 - Alarm rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad colPins[COLS] = {9, 8, 7, 6}; //connect to the column pinouts of the keypad
LCD Connection rs = A5, en = A4, d4 = A3, d5 = A2, d6 = A1, d7 = A0;
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