GSM Remote Control – 2 IN and 2 OUT DTMF
Part 1 – Introduction
Excellent to remotely control via GSM the activation of engines, lightening or watering systems and alarm systems. It sends commands…
GSM Remote Control – 2 IN and 2 OUT DTMF
Part 2 – Schematic
Let’s now look into the schematic diagram; in it you can note the usual Microchip microcontroller governing the GSM/GPRS module…
GSM Remote Control – 2 IN and 2 OUT DTMF
Part 3 – Assembly
On the construction perspective, the remote control does not present many difficulties, just the obvious ones that appear when working…
GSM Remote Control – 2 IN and 2 OUT DTMF
Part 4 – SMS Command
The set of commands of this remote is divided into two categories: the SMS ones and the DTMF tones. The…