The relay module will need 5V from Arduino to power up and will get input from four different digital pins of the Arduino. Now let’s connect the relay module to your home appliance. Take the positive ...

This code sets the variable "relay_pin" to 7, which means that the relay is connected to digital pin 7 on the Arduino Uno. void setup() { pinMode(relay_pin,OUTPUT); } In the setup() function, the ...

Here to turn on the Relay with Arduino we just need to make that Arduino Pin High (A0 in our case) where Relay module is connected. Below given is Relay Driver Circuit to build your own Relay module: ...

you should place it to the libraries folder which should be located in the Arduino folder. For me, this libraries folder is located in: We have specified that there are 4 relays on this Relay Module ...

Also it is pretty easy to make your own programmer, or you can program the ESP-01 module with the help of the Arduino IDE ... this ESP-01 Wi-Fi Relay can be used as a smart on/off switch for handling ...

Download "sms_call_gate.ino" Sketch from the repository and Upload it to Arduino. NOTE : Make sure ... It will help you to see the response of module on sms and call. Make a call on SIM (inserted in ...

6. Pins Gnd and Vcc of the Bluetooth module are connected to Gnd and +3.3V of Arduino board respectively. Pins 2, 3 and 4 are connected to the three relays (RL1, RL2 and RL3) of the relay board. Pins ...