Connect one end of the photocell to 5V, the other end to Analog 0. Then connect one end of a 10K resistor from Analog 0 to ground Connect LED from pin 11 through a ...
Upload Code to Arduino & ESP32 Open arduino_code.ino in the Arduino IDE and upload it to Arduino. Open esp32_code.ino in the Arduino IDE and upload it to ESP32.
Abstract: Access to clean drinking water is critical for public health, yet many water sources contain dissolved solids, salts, and microbial contaminants that are not visually detectable but pose ...
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