Voltage reading over wifi or bluetooth

At first you have to step down the voltage. Because arduino uno can stand up to 5 V. Then measure the voltage with any analog pin (A0-A5). You'll have to do all necessary calculation to get the voltage reading inside your code.

Rest of the hardware and coding will be depending on whether you choose wifi or bluetooth. If you want to transfer data from one arduino to another via bluetooth, you'll have to use two HC-05 modules in Master-slave mode.

If you want to transfer data through wifi, you'll have to use an wifi shield. You can see the data from any other device connected to the same wifi network.

If you choose ESP32/ESP8266 instead of arduino, you can see the voltage reading from anywhere in the world by using BLYNK app.

thanks so much for your replies.

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