Use touchRead() function on ESP32-H2

[Mqxx]

Board

ESP32-H2 Super Mini

Device Description

ESP32-H2 Super Mini on a breadboard

Hardware Configuration

Nothing

Version

latest stable Release (if not listed below)

IDE Name

Arduino IDE

Operating System

Windows 10

Flash frequency

64MHz

PSRAM enabled

no

Upload speed

921600

Description

Unable to use the touch example sketch. I can not find any reference if I can even use the touchRead() function on the ESP32-H2. If not is there an alternative that I can use?

Sketch

#include "Arduino.h"

void setup() {
  Serial.begin(115200);
  delay(1000);  // give me time to bring up serial monitor
  Serial.println("ESP32 Touch Interrupt Test");
}

void loop() {
  Serial.printf("T2 pin2 = %d \n", touchRead(2));
  delay(100);
}

Debug Message

C:\Users\Mqx\AppData\Local\Temp\.arduinoIDE-unsaved2025517-10792-1r8b5qd.0rat\sketch_jun17a\sketch_jun17a.ino: In function 'void loop()':
C:\Users\Mqx\AppData\Local\Temp\.arduinoIDE-unsaved2025517-10792-1r8b5qd.0rat\sketch_jun17a\sketch_jun17a.ino:18:36: error: 'touchRead' was not declared in this scope; did you mean 'touch_pad_t'?
   18 |   Serial.printf("T2 pin2 = %d \n", touchRead(2));
      |                                    ^~~~~~~~~
      |                                    touch_pad_t
exit status 1

Compilation error: 'touchRead' was not declared in this scope; did you mean 'touch_pad_t'?

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[SuGlider]

@Mqxx - ESP32-H2 has no touch peripheral. This code won't work with the H2.

ESP32, ESP32-S2, ESP32-S3 and ESP32-P4 are the only one that support Touchpads.

It is possible to test touch support in code using:

#if SOC_TOUCH_SENSOR_SUPPORTED
// your code

#else
#error This SoC doesn't support Touch Peripheral and API
#endif

[Mqxx]

Thanks for the quick response. Is there any documentation on this, what boards are supported?

[SuGlider]

Is there any documentation on this, what boards are supported?

You can find a table with supported peripheral list at
https://docs.espressif.com/projects/arduino-esp32/en/latest/libraries.html

General documentations at https://docs.espressif.com/projects/arduino-esp32/en/latest/

It is also possible to check peripehral support of each chip using the datasheet
https://github.com/espressif/arduino-esp32?tab=readme-ov-file#supported-chips
In the first 3 pages there is a diagram with all the supported peripehral for that SoC.

ESP32-H2 has this:

[Mqxx]

Thanks for the information 😃