Two Grow Fingerprint sensors

ESPHome
1

Hi guys,

I’m new in YAML. I want to use two Grow Fingerprint sensors on my ESP32.
Please, how can I declare two? If I try to do it like a list, it shows Error by the “on_finger_scan…”.

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Thank you for every help/comment.

2

The id has to be unique for each instance. You can’t reuse id names.

3

You mean the row 21 - id: fingerprint_in and row 25 - id: fingerprint_out?
These are not same.

4

I see, you have the 2 id’s on the same sensing pin. Did you try different sensing pins for each reader?

5

Yes, I tried with GPIO32 now. But the error not about the sensing pin.
I’m new by YAML and I don’t know how to make two instance of the component.
Can I just make it as list with character ’ - ’ before the id?

6

It depends on how the integration was written. It may very well only support a single reader. You could file a feature request/bug report on github.

7

Ok, I made a request to update. fingerprint_grow multiple instances · Issue #1522 · esphome/feature-requests · GitHub
If somebody knows how to make two instances of the “fingerprint_grow” conponent, please let me know :wink:

8

Hi,

I tried to create two instances of the object without the events and it looks is working.
Just if I add the events, it says: fault. Looks like a bug in the component, or my fault by using YAML?

esphome:
  name: test_loader
  platform: ESP32
  board: esp32dev

uart:
  - id: uart_in
    tx_pin: GPIO17
    rx_pin: GPIO16
    baud_rate: 57600
  - id: uart_out
    tx_pin: GPIO23
    rx_pin: GPIO22
    baud_rate: 57600

fingerprint_grow:
  - id: fingerprint_in
    uart_id: uart_in
    sensing_pin: GPIO32
    
    
  - id: fingerprint_out
    uart_id: uart_out
    sensing_pin: GPIO12

Thank for help and some Idea

9

Oh I see what I think is the problem, all your automations were under the same entry. All actions for uart_in are under uart_out. Separate them to their respective entries.

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Inked62ec66431ad523fc69e90614e9c7d5e5d56cd64b_LI941×470 58.5 KB

10

Hi Mike,
I’m not understanding, what you mean with “Separate them to their respective entries.”
Can you write some example?

Thank you very much.

11 

fingerprint_grow:
### this is the entry
  id: finger_in
  sensing_pin: GPIO12 ##use different pins for each sensor
  uart_id: uart_finger_in
###end of entry

###start of automations
  on_finger_scan_matched:
    - text_sensor.template.publish:
        id: fingerprint_state
        state: "Authorized finger"
    - switch.turn_on: gate
    - delay: 500ms
    - switch.turn_off: gate
  on_finger_scan_unmatched:
    - text_sensor.template.publish:
        id: fingerprint_state
        state: "Unauthorized finger"
### end of automations

### start second entry
  id: finger_out
  sensing_pin: ##use different pins for each sensor
  uart_id: uart_finger_out
###end of entry

###start of automations for second entry
  on_finger_scan_matched:
    - text_sensor.template.publish:
        id: fingerprint_state
        state: "Authorized finger"
    - switch.turn_on: gate
    - delay: 500ms
    - switch.turn_off: gate
  on_finger_scan_unmatched:
    - text_sensor.template.publish:
        id: fingerprint_state
        state: "Unauthorized finger"
12

Ok, it’s not working on first, but after small correction looks good. (valid by ESPHome)

fingerprint_grow:
  - id: fingerprint_in
    uart_id: uart_in
    sensing_pin: GPIO32
    on_finger_scan_matched:
      - switch.turn_on: relay_unlock
      - fingerprint_grow.aura_led_control:
          id: fingerprint_in
          state: BREATHING
          speed: 200
          color: BLUE
          count: 1
      - text_sensor.template.publish:
          id: fingerprint_out_state
          state: "Authorized finger"
      - switch.turn_on: relay_unlock
      - delay: 500ms
      - switch.turn_off: relay_unlock
    
    
  - id: fingerprint_out
    uart_id: uart_out
    sensing_pin: GPIO12
    on_finger_scan_matched:
      - switch.turn_on: relay_unlock
      - fingerprint_grow.aura_led_control:
          id: fingerprint_out
          state: BREATHING
          speed: 200
          color: BLUE
          count: 1
      - text_sensor.template.publish:
          id: fingerprint_out_state
          state: "Authorized finger"
      - delay: 500ms
      - switch.turn_off: relay_unlock

I thank you. You are great man.

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