Beginner4/7/2026- Author: IoTSpark Maker
ESP32 + Touch Sensor TTP223: Capacitive Touch Sensing (Quick Test Sample Code)
The TTP223 is a capacitive touch sensor module — it detects a touch based on a change in capacitance when a (conductive) finger nears the sensor's surface, unlike a mechanical push button (no moving parts, no wear over time).
ttp223touchcam-ung-cham
4 steps2 components
The TTP223 is a capacitive touch sensor module — it detects a touch based on the change in capacitance when a (conductive) finger comes near the sensor's surface, completely unlike a mechanical push button (no moving parts, no wear over time). It outputs a simple digital HIGH/LOW signal, making it the easiest sensor in this series to use.
A special note: the ESP32 also has a built-in touch-sensing feature right on the chip (no separate module needed) via GPIO pins labeled T0-T9 — this lesson covers both approaches.