Camera doesn't work with pulse_meter integration

[hugokernel]

The problem

It is not possible to use esp32_camera and pulse_meter integrations both together.

Camera setup always failed.

Which version of ESPHome has the issue?

2022.6.2

What type of installation are you using?

pip

Which version of Home Assistant has the issue?

2022.7.0

What platform are you using?

ESP32

Board

esp32cam

Component causing the issue

pulse_meter, esp32_camera

Example YAML snippet

esphome:
  name: campulse
  platform: ESP32
  board: esp32cam

<<: !include network.yaml

captive_portal:

api:
  password: !secret password

ota:
  password: !secret password

logger:
  level: INFO

sensor:
  - platform: pulse_meter
    name: Pulse
    pin: GPIO16
    internal_filter: 10us
    accuracy_decimals: 2
    timeout: 30s

esp32_camera:
  id: camera
  external_clock:
    pin: GPIO0
    frequency: 20MHz
  i2c_pins:
    sda: GPIO26
    scl: GPIO27
  data_pins: [GPIO5, GPIO18, GPIO19, GPIO21, GPIO36, GPIO39, GPIO34, GPIO35]
  vsync_pin: GPIO25
  href_pin: GPIO23
  pixel_clock_pin: GPIO22
  power_down_pin: GPIO32
  name: Image
  test_pattern: false
  vertical_flip: false
  horizontal_mirror: false
  jpeg_quality: 63

Anything in the logs that might be useful for us?

INFO Waiting for result...
INFO OTA successful
INFO Successfully uploaded program.
INFO Starting log output from watermeter.local using esphome API
INFO Successfully connected to watermeter.local
[06:50:24][I][app:102]: ESPHome version 2022.6.2 compiled on Jul 26 2022, 06:49:32
[06:50:24][E][esp32_camera:129]:   Setup Failed: ERROR

Additional information

I tried to find out where the problem was and it seems to be with the interrupt handling.

If I remove the attachInterrupt call in the pulse_meter setup, there is no problem and camera initialization is ok.

Note:

• I use the ESP32 AI Thinker board (schematic: https://i0.wp.com/randomnerdtutorials.com/wp-content/uploads/2020/03/ESP32-CAM-AI-Thinker-schematic-diagram.png?quality=100&strip=all&ssl=1)
• The GPIO16 is not used by the camera module (and problem is the same with other free GPIO)

Related links:

• https://github.com/espressif/esp32-camera/issues/256#issuecomment-813520803
• https://github.com/esphome/issues/issues/2483

[hugokernel]

I have just tested with an ESP32-WROVER-DEV module (ESP32-WROVER-E module) and the problem is the same: It is not possible to use the pulse integration with the camera module.

Specific configuration for this device:

esp32_camera:
  name: My Camera
  id: camera
  external_clock:
    pin: GPIO21
    frequency: 10MHz
  i2c_pins:
    sda: GPIO26
    scl: GPIO27
  data_pins: [GPIO4, GPIO5, GPIO18, GPIO19, GPIO36, GPIO39, GPIO34, GPIO35]
  vsync_pin: GPIO25
  href_pin: GPIO23
  pixel_clock_pin: GPIO22

The output:

INFO Waiting for result...
INFO OTA successful
INFO Successfully uploaded program.
INFO Starting log output from campulse.local using esphome API
INFO Successfully connected to campulse.local
[08:12:39][I][app:102]: ESPHome version 2022.8.3 compiled on Sep 30 2022, 08:12:01
[08:12:39][E][esp32_camera:095]:   Setup Failed: ESP_ERR_NOT_FOUND

If I remove the pulse integration, camera works well.

[ssieb]

Yes, as described in the first comment, there's a problem with how interrupts work. There's a conflict between what the camera framework does and everything else.

[hugokernel]

Yes, as described in the first comment, there's a problem with how interrupts work. There's a conflict between what the camera framework does and everything else.

I understood well, I was just bringing a test with a different device to rule out a hardware problem.

[kaangoksal]

I have the exact same problem.... Can't use interrupts with esp_camera.h, I'm using esp-idf and native esp functions to define interrupts.

static void configureInterruptGPIO() {
    ESP_LOGI(TAG, "Configuring GPIO interrupt");

    gpio_config_t io_conf = {};

    //interrupt of rising edge
    io_conf.intr_type = GPIO_INTR_POSEDGE;
    //bit mask of the pins, use GPIO4/5 here
    io_conf.pin_bit_mask = GPIO_INPUT_PIN_SEL;
    //set as input mode
    io_conf.mode = GPIO_MODE_INPUT;
    //enable pull-up mode
    io_conf.pull_up_en = 1;
    gpio_config(&io_conf);

    //gpio_install_isr_service(ESP_INTR_FLAG_DEFAULT); // I guess because of camera init this is not needed? 

    gpio_isr_handler_add(GPIO_INPUT_IO_0, gpio_isr_handler, (void*) GPIO_INPUT_IO_0);
}

here is how they are called

void app_main(void)
{
    gpio_evt_queue = xQueueCreate(10, sizeof(uint32_t));
    configureSDCard();
    init_camera(FRAMESIZE_UXGA);

    configureLedGPIO();

    configureInterruptGPIO();
}

when configureInterruptGPIO calls, I get Guru Meditation Error: Core 0 panic'ed (StoreProhibited). Exception was unhandled.

EDIT:

I discovered that my issue was because I was using GPIO 16, according to this document , it is connected to PSRAM so if you are using the camera this is going to create problems, just as in my case

[AapoTahkola]

I am having issues with ai thinker esp32cam and servo control. After changing ledc to use different channel(channel 0 is used by the cam) I get no output. https://community.home-assistant.io/t/ai-thinker-esp32-cam-with-servo-control/466312 Should I file another bug report?

[kaangoksal]

@AapoTahkola this document is pretty useful to find out what pins you can use document

if you disable sd card there are pins that you can use. such as 13

[hugokernel]

I specify that in my 2 tests on the 2 differents hardware, the GPIO used for the pulse_meter integration was free and without conflict with the GPIOs used by the camera.

@kaangoksal Sorry, I didn't see the Edit about the GPIO16, indeed, I didn't see that the pin was connected to the PSRAM. However, I had tried other pins and it always did the same thing, I will redo tests with a free GPIO and modify the example.

Can you make the AI-Thinker camera work with the pulse_meter integration ?

[AapoTahkola]

@AapoTahkola this document is pretty useful to find out what pins you can use document

if you disable sd card there are pins that you can use. such as 13

I though naively as this esp32cam module does not have tf card functionality it would not be enabled. I have been trying with pins 12 and 14 mostly which are tf pins. How am I to accomplish this task of compiling version with that "SD_MMC.begin" hack enabled?

BTW, if you need a heavy handed tool for debugging hw stuff raspberry pi pico based logic analyzer is what I use. I took me quite a bit of banging head to wall to get https://github.com/pico-coder/sigrok-pico compiled and working on linux though. You should consider which rpi pico project you use based on what os(windows, linux) you have. 3.6v zener diodes and one resistor for each channel is the cheapest/easiest way of making it 5v tolerant as I see it.

[AapoTahkola]

I get Component esp32_camera_my cannot be loaded via YAML (no CONFIG_SCHEMA). if I try to compile esp32_camera as external_component.

[hugokernel]

I just retrying with others IO and the result is the same: There is no way to use the camera with the pulse_meter integration.