Cannot get PIR to work with ESP32-CAM

ESPHome
#1

Here are my connections

Skjermbilde 2020-09-17 kl. 12.36.51
Skjermbilde 2020-09-17 kl. 12.36.511302×774 108 KB

I cannot get the PIR to report motions back to Home Assistant/ESPHome.
Is my script/connections looking fine, or am I missing something (obviously I do :slight_smile: )
Her is my ESPHome script for the ESP32-CAM:

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
  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: GPIO12
    name: ${friendly_name} PIR Sensor
    device_class: motion
    id: cam_garasje_pir
    on_state:
      - switch.turn_on: cam_garasje_lys
  - platform: template
    name: temp_motion
    lambda: 'return id(cam_garasje_pir).state;'
    filters:
      - delayed_off: 1min
    on_release:
      - switch.turn_off: cam_garasje_lys
switch:
  - platform: restart
    name: ${friendly_name} restart
    id: restart_switch
  - platform: gpio
    name: ${friendly_name} innebygd lys
    id: cam_garasje_lys
    pin: GPIO4
#2

What PIR sensor are you using?

#3

This is the one: Mini IR Pyroelectric Infrared PIR AM312 Sensor DC 2.7 to 12V

The pins are connected correctly to the PIR, it seems :slight_smile:

Skjermbilde 2020-09-17 kl. 15.57.55
Skjermbilde 2020-09-17 kl. 15.57.55580×554 147 KB

#4

Needs a pullup resistor on the signal line if this schematic showing an open collector output is to be believed

3-Sensor-Interface-Schematic-1

Software pullup will be fine.

Also you will need to invert the signal. Movement = 0V, no movement = 3.3V

#5

Just adding this to the binary_sensor: part in the config?
mode: INPUT_PULLUP

#6

Yep, and inverted: True (see sneaky edit in my post).

#7

:+1:
I´ll give it a shot :slight_smile: Thank you, @tom_l

#8

BTW, @tom_l : What is there a difference of using pin: GPIO12 and pin: 12? or are they the same?

#9

Exactly the same. https://esphome.io/guides/configuration-types.html#pin

#11

@tom_l; unfortunately, it’s still not working…

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO12
      mode: INPUT_PULLUP
      inverted: true
    name: ${friendly_name} PIR Sensor
    device_class: motion
    id: cam_garasje_pir
#12

Do you have any way to measure the voltage on the PIR output pin?

Is it changing with movement?

#13

Yes. Measuring beteeen output and ground?

#14

Yes.

#15

Measuring 3.309 —> 2.270 V
No change when movement…

What change would I expect?

I change the sensor… No success there either…

#16

Below 0.8V with movement.

Try measuring the output when not connected to the ESP.

#17

I disconnected the pin from the GPIO on the ESP, then there is 0.00v
… and I do have 3.3v on the PIR hot and ground connectors

#18

And it does not change to 3.3V with movement?

In that case we were right to add the pullup resistor.

Try powering it from 5v. It has a 3V regulator on board.

#19

I am powering the ESP from 5V

#20

No, Sir. It does not!

#21

Power the PIR from 5V.