`Enhancement` Use pins from relais for other purpose

[Mauricewillemstein]

Enhancement Summary

Use pins from relais for other purpose

Detailed Description

I wonder if it will be possible to use the pins from the 2 relais to use for other purpose? I like to use the two gpio pins number 19 and 22 for i2c. I have spare room next to one of my nspanels and i want to connect a rfid reader, pn532, to it to automate some other things.

Additional Context

No response

[edwardtfn]

I don't want to change the core system to allow this, however I will be happy to help you freeing up those pins with customizations. Please give me some time and I will share some proposed code when I get home.

[Mauricewillemstein]

Thx that will be great and maybe usefull for other people

[edwardtfn]

So, adding this to your panel's yaml should be able to free-up the relay pins:

switch:
  - id: !extend relay_1
    platform: template  # Change the platform to free-up the GPIO
    pin: !remove
    optimistic: True

  - id: !extend relay_2
    platform: template  # Change the platform to free-up the GPIO
    pin: !remove
    optimistic: True

This is not removing the code related to the relays, as that would make it a bit more complex and will require lots of tests. With this change, the relays are still exposed to Home Assistant, however those are only virtual (dummy) and won't have any relation to the physical relays.

[Mauricewillemstein]

Thx i will try it when i get at home.

Hope you enjoy the icecream :)

[Mauricewillemstein]

The code will upload without problems. All i have to do now is wire up everything and test it. Keep you informed

[Mauricewillemstein]

Hi, Got it sort of working now. I cut the traces in the power supply and solderd 4 wires for connecting the rfid reader. Only thing is that sometimes it says not found on the bus. I think that i have to modify the code a bit to add a wait before scanning the i2c bus.

Here is my code:

esphome:
  name: woonkamer
  friendly_name: Woonkamer

substitutions:
  # Settings - Editable values
  device_name: "woonkamer"
  friendly_name: "Woonkamer"
  wifi_ssid: !secret wifi_ssid
  wifi_password: !secret wifi_password
  # nextion_update_url: "http://homeassistant.local:8123/local/nspanel_eu.tft"  # Optional
  # Add-on configuration (if needed)
  # heater_relay: "1"  # Possible values: "1" or "2"

# Customization area
##### My customization - Start #####
##### My customization - End #####

# Core and optional configurations
packages:
  remote_package:
    url: https://github.com/Blackymas/NSPanel_HA_Blueprint
    ref: main #dev
    refresh: 300s
    files:
      - nspanel_esphome.yaml # Basic package
      # Optional advanced and add-on configurations
      - esphome/nspanel_esphome_advanced.yaml
      # - esphome/nspanel_esphome_addon_ble_tracker.yaml
      # - esphome/nspanel_esphome_addon_bluetooth_proxy.yaml
      # - esphome/nspanel_esphome_addon_climate_cool.yaml
      # - esphome/nspanel_esphome_addon_climate_heat.yaml
      # - esphome/nspanel_esphome_addon_climate_dual.yaml
      # - esphome/nspanel_esphome_addon_cover.yaml

switch:
  - id: !extend relay_1
    platform: template  # Change the platform to free-up the GPIO
    pin: !remove
    optimistic: True

  - id: !extend relay_2
    platform: template  # Change the platform to free-up the GPIO
    pin: !remove
    optimistic: True

i2c:
  sda: GPIO19
  scl: GPIO23
  #frequency: 50kHz
  scan: True

pn532_i2c:
  address: 0x48
  update_interval: 1s
  on_tag:
    then:
      #- rtttl.play: 'two_short:d=4,o=5,b=100:16e6,16e6'
       #- rtttl.play: 'long:d=1,o=5,b=100:e6'
       - rtttl.play: 'siren:d=8,o=5,b=100:d,e,d,e,d,e,d,e'
       #- rtttl.play: 'scale_up:d=32,o=5,b=100:c,c#,d#,e,f#,g#,a#,b'
       #- rtttl.play: 'star_wars:d=16,o=5,b=100:4e,4e,4e,8c,p,g,4e,8c,p,g,4e,4p,4b,4b,4b,8c6,p,g,4d#,8c,p,g,4e,8p'
       - text_sensor.template.publish:
            id: rfid_tag
            state: !lambda 'return x;'

text_sensor:
  - platform: template
    name: "RFID Tag"
    id: rfid_tag

[edwardtfn]

You probably can set scan to false on boot and then start it after boot. Something like this (not tested):

substitutions:
  # Settings - Editable values
  device_name: woonkamer
  friendly_name: Woonkamer
  wifi_ssid: !secret wifi_ssid
  wifi_password: !secret wifi_password

# Core and optional configurations
packages:
  remote_package:
    url: https://github.com/Blackymas/NSPanel_HA_Blueprint
    ref: main #dev
    refresh: 300s
    files:
      - nspanel_esphome.yaml # Basic package
      - esphome/nspanel_esphome_advanced.yaml

# Customization area
##### My customization - Start #####

switch:
  - id: !extend relay_1
    platform: template  # Change the platform to free-up the GPIO
    pin: !remove
    optimistic: True

  - id: !extend relay_2
    platform: template  # Change the platform to free-up the GPIO
    pin: !remove
    optimistic: True

i2c:
  id: i2c_bus
  sda: GPIO19
  scl: GPIO23
  #frequency: 50kHz
  scan: false

esphome:
  on_boot:
    - priority: -100.0  # Almost everything should have started at this point
      then:
        - delay: 5s
        - lambda: i2c_bus->set_scan(true);

pn532_i2c:
  address: 0x48
  update_interval: 1s
  on_tag:
    then:
      #- rtttl.play: 'two_short:d=4,o=5,b=100:16e6,16e6'
       #- rtttl.play: 'long:d=1,o=5,b=100:e6'
       - rtttl.play: 'siren:d=8,o=5,b=100:d,e,d,e,d,e,d,e'
       #- rtttl.play: 'scale_up:d=32,o=5,b=100:c,c#,d#,e,f#,g#,a#,b'
       #- rtttl.play: 'star_wars:d=16,o=5,b=100:4e,4e,4e,8c,p,g,4e,8c,p,g,4e,4p,4b,4b,4b,8c6,p,g,4d#,8c,p,g,4e,8p'
       - text_sensor.template.publish:
            id: rfid_tag
            state: !lambda 'return x;'

text_sensor:
  - platform: template
    name: "RFID Tag"
    id: rfid_tag

##### My customization - End #####

[Mauricewillemstein]

Sorry for the late responce. Been from home. But want to let you know that it works fine.

Thx alot for your help