← Back to BlogBeginner Arduino ESP32 course — IoT from Blink to SmartNode · Part 4 / 8
ESP32 programming (4/8): ADC — analog sensors & DHT22
12-bit ADC, voltage dividers, DHT library for temp/humidity.
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Beginner Arduino ESP32 course — IoT from Blink to SmartNode · Part 4/8▼
Part 4/8 ·
analogReadon GPIO 34; DHT22 on GPIO 32. Prefer ADC1 pins when WiFi is on.
Frequently asked questions
ESP32 ADC voltage range?
Typically 0–3.3 V — use a divider for 5 V sensors.
Continue reading
ESP32 programming (1/8): Board intro, Arduino IDE setup & Blink
Free ESP32 Arduino course — part 1: DevKit, esp32 board package, Blink sketch, Serial Monitor. Roadmap: learn-arduino-esp32-from-scratch
Read more →ESP32 programming (2/8): Digital GPIO, buttons & debounce
ESP32 GPIO: digital I/O, internal pull-up, LED toggle, software debounce.
Read more →ESP32 programming (3/8): PWM — LED fade & SG90 servo
ESP32 LEDC PWM, smooth LED fade, ESP32Servo library for 0–180° control.
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Free chat about MVP, timeline, and the right profit-sharing approach.