The CapacitiveTouch Library is designed to simplify the use of capacitive touch sensors on Arduino UNO-R4 boards (Minima and WiFi). This library hides the low-level hardware details (CTSU, DTC, interrupts, etc.) and provides a simple, user-friendly API for beginners and educational projects.
- Easy to Use API:
Initialize your sensor with just one constructor call and use simple methods to read sensor values and detect touches. - Board Support:
Compatible with Arduino UNO-R4 Minima and UNO-R4 WiFi boards. - Low-Level Abstraction:
All complex tasks (hardware setup, measurement control, interrupt management) are abstracted away so you can focus on your project.
- Copy
CapacitiveTouch.h andCapacitiveTouch.cpp into your Arduino libraries folder. - Restart your Arduino IDE so it recognizes the new library.
| Arduino Pin | Touch Sensor Channel (TS#) | Channel Control Index (CHAC idx) | Channel Control Bit Mask (CHAC val) |
|---|
| D0 | 9 | 1 | (1 << 1) |
| D1 | 8 | 1 | (1 << 0) |
| D2 | 34 | 4 | (1 << 2) |
| D3 | 13 | 1 | (1 << 5) |
| D8 | 11 | 1 | (1 << 3) |
| D9 | 2 | 0 | (1 << 2) |
| D11 | 10 | 1 | (1 << 2) |
| D13 | 12 | 1 | (1 << 4) |
| A1 (D15) | 21 | 2 | (1 << 5) |
| A2 (D16) | 22 | 2 | (1 << 6) |
| LOVE_BUTTON | 0 | 0 | (1 << 0) |
| Arduino Pin | Touch Sensor Channel (TS#) | Channel Control Index (CHAC idx) | Channel Control Bit Mask (CHAC val) |
|---|
| D0 | 9 | 1 | (1 << 1) |
| D1 | 8 | 1 | (1 << 0) |
| D2 | 13 | 1 | (1 << 5) |
| D3 | 34 | 4 | (1 << 2) |
| D6 | 12 | 1 | (1 << 4) |
| D8 | 11 | 1 | (1 << 3) |
| D9 | 2 | 0 | (1 << 2) |
| D11 | 7 | 0 | (1 << 7) |
| D12 | 6 | 0 | (1 << 6) |
| A1 (D15) | 21 | 2 | (1 << 5) |
| A2 (D16) | 22 | 2 | (1 << 6) |
| LOVE_BUTTON | 27 | 3 | (1 << 3) |
Note: Only the above pins are supported. Other pins are not configured for capacitive touch sensing.
#include"CapacitiveTouch.h"// Instantiate a capacitive touch sensor using the LOVE_BUTTON macro.CapacitiveTouch ct = CapacitiveTouch(LOVE_BUTTON);voidsetup() { Serial.begin(9600); ct.begin(); ct.setThreshold(500);// Adjust threshold (lower values increase sensitivity) Serial.println("CapacitiveTouch Library: LOVE Button test");}voidloop() {int sensorValue = ct.read(); Serial.print("Raw Value:"); Serial.println(sensorValue);if (ct.isTouched()) { Serial.println("LOVE button touched!"); }delay(100);}