* 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 project utilizes the DFRobot SEN0249 pH Sensor with an ESP32 microcontroller to measure pH levels. The code is written in C++ using the PlatformIO framework within the Arduino environment. The ...

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 ...