* according to the signal sending by your own pH probe if you don't use the DFRobot pH sensor kit probe * same circuit with different probe return different voltage value for buffer4.0 or buffer 7.0 ...

This Arduino project reads pH values from a pH sensor and sends the data to the ThingSpeak IoT platform via Wi-Fi. The project utilizes an analog pH sensor connected to analog pin A0 and communicates ...

We connected $\\mathbf{p H}$ sensor and solar cell into Arduino Board to control data transmission via red laser communication or popular known as visible light communication (VLC). The sensor was ...