TheR0 & DIpin of from the Modbus is connected toD2 & D3of Arduino using Software Serial. Similarly, we have to enableDE & REhigh which is done by connecting them to theD7 & D8pin of Arduino. The NPK Sensor has 4 wires. Thebrownone is VCC which needs a5V-30V Power Supply& can ...
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git clone https://github.com/nthnn/PH4502C-Sensor.git Place the downloaded library folder into the Arduino libraries directory on your computer. In Windows, the default location is usually: [Arduino Documents Folder]/libraries/ Launch the Arduino IDE. Then, click on "Sketch" and then navigate...
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