4) ESP32 Potentiometer Reading using ADC | Arduino IDE Tutorial.

Описание: 🔴 ESP32 Potentiometer Reading using ADC | Arduino IDE Tutorial 🔴

In this video, I explain how to read analog values from a potentiometer using the ESP32 ADC (Analog to Digital Converter) and display the readings in the Serial Monitor.

✨ What you will learn in this project:
✔ What ADC pins are on ESP32
✔ How to connect a potentiometer to ESP32
✔ Using analogRead() function in Arduino IDE
✔ Printing values on Serial Monitor
✔ Difference between ADC1 and ADC2 pins

🛠️ Connections Used:

Potentiometer middle pin → GPIO34 (ADC1_CH6)

Potentiometer side pin → 3.3V

Other side pin → GND

✅ ESP32 ADC Pins

The ESP32 has 2 ADC units:

ADC1 → 8 channels (GPIO 32–39)

ADC2 → 10 channels (GPIO 0, 2, 4, 12–15, 25–27)


So in total, 18 ADC channels.


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📌 Details:

ADC1 Channels:

GPIO32 → ADC1_CH4

GPIO33 → ADC1_CH5

GPIO34 → ADC1_CH6

GPIO35 → ADC1_CH7

GPIO36 (VP) → ADC1_CH0

GPIO39 (VN) → ADC1_CH3

GPIO37, GPIO38 → (on some modules, not always broken out)


ADC2 Channels:

GPIO0 → ADC2_CH1

GPIO2 → ADC2_CH2

GPIO4 → ADC2_CH0

GPIO12 → ADC2_CH5

GPIO13 → ADC2_CH4

GPIO14 → ADC2_CH6

GPIO15 → ADC2_CH3

GPIO25 → ADC2_CH8

GPIO26 → ADC2_CH9

GPIO27 → ADC2_CH7



⚠️ Note: ADC2 channels cannot be used when Wi-Fi is active, because Wi-Fi internally uses ADC2. So for reliable analog readings, always prefer ADC1 pins (GPIO 32–39).

👉 Perfect for beginners learning ESP32 ADC and sensor interfacing.

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