interrupt_pin not working with CST820 Touch Screen Controller

regystro commented 2 months ago

The problem

When using interrupt_pin with a CST820 sensor , the touches do not trigger on_touch action.

Polling works as expected (removing interrupt_pin, and setting update_interval: 50ms as suggested by the documentation)

Which version of ESPHome has the issue?

2024.4.0

What type of installation are you using?

pip

Which version of Home Assistant has the issue?

No response

What platform are you using?

ESP32

Board

esp32dev

Component causing the issue

cst816 Touch Screen Controller

Example YAML snippet

esp32:
  board: esp32dev

logger:

spi:
 clk_pin: GPIO14
 mosi_pin: GPIO13
 miso_pin: GPIO12

display:
  - platform: ili9xxx
    model: ili9341
    cs_pin: GPIO15
    dc_pin: GPIO2
    id: my_display

i2c:
  sda: GPIO33
  scl: GPIO32

touchscreen:
  platform: cst816
  id: my_touchscreen
  display: my_display
  interrupt_pin: GPIO21
  reset_pin: GPIO25
  update_interval: never
  on_touch:
      - lambda: |-
            ESP_LOGI("touch (single)", "x=%d, y=%d",
                touch.x,
                touch.y
                );

Anything in the logs that might be useful for us?

No response

Additional information

The board is an ESP32-2432S024C (2.4'' display with CST820 capacitive touchscreen). The display is an ILI9341. The board is detected by ESPHome like this:

Chip is ESP32-D0WD-V3 (revision v3.1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz

The interrupt pin is GPIO21. Platformio definitions: https://github.com/rzeldent/platformio-espressif32-sunton/blob/main/esp32-2432S024C.json

I'm forcing update_interval: never because even when the documentation says it should default to never, esphome config shows a value of 50ms when interrupt_pin is set. Also if not set to never, the logs suggest you to: [W][touchscreen:032]: Touch Polling Stopped. You can safely remove the 'update_interval:' variable from the YAML file.

nielsnl68 commented 2 months ago

Hello @regystro , could you do me a favor and hook the interrupt pin to a bineary_sensor and check what the response is in the log or in HA? And report back with the patron you are seeing when you press the display and move it around and lift it up again.

regystro commented 2 months ago

Hi @nielsnl68 . I just tested adding this:

binary_sensor:
  - platform: touchscreen
    name: Top Left Touch Button
    x_min: 0
    x_max: 100
    y_min: 0
    y_max: 100
    on_press:
      - lambda: |-
            ESP_LOGI("binary_sensor", "press");
    on_release:
      - lambda: |-
            ESP_LOGI("binary_sensor", "release");
    on_state:
      - lambda: |-
            ESP_LOGI("binary_sensor", "state");
    on_click:
      - lambda: |-
            ESP_LOGI("binary_sensor", "click");
    on_double_click:
      - lambda: |-
            ESP_LOGI("binary_sensor", "double_click");

Using interrupt_pin: GPIO21, nothing is detected. Disabling interrupt_pin and changing update_interval: 50ms (= polling) detects and logs all possible states.

percy10442 commented 1 month ago

I encountered the same problem.

esphome / issues