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A single-channel relay is an electronic switch that can be controlled by a low-power electrical signal, such as the output from an Arduino microcontroller. By using an Arduino Uno and a single-channel ...
Step 1 (Connect SIM900 With Arduino) Use picture as a reference for connecting SIM900 to Arduino. Step 2 (Connect Relay with Arduino) Connections are given Below : Arduino Relay Module +5V VCC GND GND ...
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