Cannot get PIR to work with ESP32-CAM

No change. The Out signal cable is still disconnected from the GPIO on the ESP, and the PIR is powered from 5V, measuring 4.9V on the PIR pins. The out signal is still at 0

You need a pullup resistor, connect it back to the ESP and try measuring the output pin voltages again.

Then it’s 3.3V

you mean a physical pullup resistor?

No, software should do.

Didn´t I just add one?

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO12
      mode: INPUT_PULLUP
      inverted: true

Yes which was why I told you to:

It’s looking like a dead sensor to me.

I swapped the PIR sensor. Now it’s at 3.3V before motion, and got 1.2V when motion
I can also see the sensor switching from OFF to ON in the States view

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Turn off the input pullup and see if it still works. I’ve seen some conflicting evidence for whether it is required or not.

There are also a chance that the level is floating still, not providing either 0V or 3.3V. I put a napkin on top of the PIR, and the Out signal is still at 1,27V

Yeah ok. It is needed then. Thanks.

For the record, and history for others who might have the same issue, I post the final yaml below.

My initial problem was solved after swapping the PIR component, as my first PIR appeared broken.

substitutions:
  devicename: cam_garasje
  friendly_name: CAM Garasje

esphome:
  name: ${devicename}
  platform: ESP32
  board: nodemcu-32s

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_pw

logger:
api:
  reboot_timeout: 0s
ota:

web_server:
  port: 80
  
esp32_camera:
  name: ${friendly_name}
  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
#  resolution: 800x600
  resolution: 1024x768
  pixel_clock_pin: GPIO22
  power_down_pin: GPIO32

time:
  - platform: homeassistant
    id: homeassistant_time
    timezone: Europe/Oslo

# esp32_ble_tracker:

sensor:
  - platform: wifi_signal
    name: ${friendly_name} WiFi signal
    update_interval: 30s
  - platform: uptime
    name: ${friendly_name} Uptime
    
binary_sensor:
  - platform: gpio
    pin:
      number: GPIO12
      mode: INPUT_PULLUP
#      inverted: true
    name: ${friendly_name} PIR Sensor
    device_class: motion
    id: cam_garasje_pir
    on_state:
      - switch.turn_on: cam_garasje_red_led
  - platform: template
    name: temp_motion
    internal: true
    lambda: 'return id(cam_garasje_pir).state;'
    on_release:
      - switch.turn_off: cam_garasje_red_led
switch:
  - platform: restart
    name: ${friendly_name} restart
    id: restart_switch
  - platform: gpio
    pin: GPIO33
    name: ${friendly_name} rød LED
    id: cam_garasje_red_led
    inverted: true
  - platform: gpio
    pin: GPIO4
    name: ${friendly_name} innebygd lys
    id: cam_garasje_lys

The PIR will run OK on 3.3v

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I have that exact same PIR working on the Esp32 cam. Some people were having issues because of the pin number. After doing some research, I used gpio13 and has been working since.



#PIR

  - platform: gpio
    pin: GPIO13
    name: ${devicename} PIR Sensor
    device_class: motion    
    
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GPIO12 has been working in my testlab for several days now, too :slight_smile:

I just wanted to add my findings. Have tried GPIO12 & GPIO13. Didn’t work for me. GPIO14 did. This is how my esp32 cam looks like.

binary_sensor:

  - platform: gpio
    pin: GPIO14
    name: motion $name occupancy
    device_class: motion    

I’ve noticed the last two post have their substitution like this.

 name: ${devicename} PIR Sensor

Any different or beneficial compared to what I use?

Also, do we need a sd card with this cam? When I got mine, I just bought a 4GB and slap it on. I am saving imgs and video to HA folder. Wondering do we really need the card? Got another esp32 cam coming and I didn’t order one this time.

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Got the same issue, tried various GPIOs and 14 worked Im not sure if the others are reserved for some camera operations but 14 worked for me.

For anybody else having issues with this, I recently set one up and working just fine so thought I’d share my experience!

I followed these instructions for the hardware setup, but using ESPHome.

Hardware:
ESP 32 CAM
AM312 Motion Sensor
Resistor pack (although you only need a 1k & 10k resistor)
Transistor Pack (although you only need an 2N3904)
Single LED (if required)
Project Box” - Optional :slight_smile:
(connector wires & soldering iron)

From the link above, I used these schematics for the PIR and created a little ‘wiring harness’.

  • GPIO4 = ESP32 Cam built in flash light
  • GPIO33 = ESP32 Cam built in red LED status light
  • GPIO12 = Optional LED (also connected to GND)
  • GPIO13 = Motion Sensor (also connected to GND & 5v)
substitutions:
  hostname: Bird Cam

esphome:
  name: bird-cam
  platform: ESP32
  board: esp32dev

# Enable logging
logger:
#  level: VERY_VERBOSE
  
# Enable Home Assistant API
api:

web_server:
  port: 443


wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: !secret fallback_wifi_ssid
    password: !secret fallback_wifi_pass

captive_portal:


#Configuration
esp32_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

# Image settings
  name: stream
  max_framerate: 24 fps
  idle_framerate: 0.2 fps
  resolution: SVGA
  vertical_flip: false
  horizontal_mirror: false
  jpeg_quality: 30
  contrast: 1
  brightness: 0.
  saturation: 0.

esp32_camera_web_server:
  - port: 8080
    mode: stream
  - port: 8081
    mode: snapshot
    
output:
# Built In flashlight
  - platform: gpio
    pin: GPIO4
    id: gpio_4
# Built in statuslight
  - platform: gpio
    pin:
      number: GPIO33
      inverted: True
    id: gpio_33


## Single LED connected to GPIO12 & Ground
  - platform: gpio
    pin:
      number: GPIO12
      inverted: False
    id: gpio_12

light:
# Built In flashlight
  - platform: binary
    output: gpio_4
    name: $hostname Flash
    id: flash
# Built in statuslight
  - platform: binary   
    output: gpio_33
    name: $hostname Status LED

## Single LED connected to GPIO12 & Ground
  - platform: binary
    output: gpio_12
    id: pin12led
    name: $hostname pin12 LED
    
sensor:
  - platform: uptime
    name: $hostname Uptime Sensor
    id: uptime_sensor
    update_interval: 60s
    on_raw_value:
      then:
        - text_sensor.template.publish:
            id: uptime_human
            state: !lambda |-
              int seconds = round(id(uptime_sensor).raw_state);
              int days = seconds / (24 * 3600);
              seconds = seconds % (24 * 3600);
              int hours = seconds / 3600;
              seconds = seconds % 3600;
              int minutes = seconds /  60;
              seconds = seconds % 60;
              return (
                (days ? to_string(days) + "d " : "") +
                (hours ? to_string(hours) + "h " : "") +
                (minutes ? to_string(minutes) + "m " : "") +
                (to_string(seconds) + "s")
              ).c_str();

text_sensor:
  - platform: wifi_info
    ip_address:
      name: $hostname IP Address
      icon: mdi:ip
    ssid:
      name: $hostname Connected SSID
      icon: mdi:wifi
    bssid:
      name: $hostname Connected BSSID
      icon: mdi:wifi
    mac_address:
      name: $hostname Mac Wifi Address
      icon: mdi:wifi-settings

  - platform: template
    name: $hostname Uptime Human Readable
    id: uptime_human
    icon: mdi:clock-start

  - platform: version
    name: $hostname ESPHome Version

   
binary_sensor:
  - platform: status
    name: $hostname Status

  - platform: gpio
    pin: 
     number: GPIO13
     mode: INPUT_PULLDOWN
     inverted: true
    name: $hostname Motion
    device_class: motion
#    on_press:
#      then:
#        - light.turn_on: pin12led
#        - delay: 1s
#        - light.turn_off: pin12led

    
button:
  - platform: restart
    name: RESTART $hostname
    

Not pretty - but does the job!

3 Likes

Another note to add to the above…
This only works WITH an SD card inserted (although it doesn’t do anything!)

Thank you for sharing your solution, it helped me a lot. My setup worked right away.

And sharing your YAML config has rounded out my confiuration. Thank you

1 Like