esphome/mlock-common.yaml

# todos:
# - move code into packages to make this re-useable
# - testing

substitutions:
  ota_password: ""
  api_enckey: ""
  wifi_ssid: ""
  wifi_password: ""
  vault_role_id: ""
  vault_secret_id: ""

###### nothing to change below this line ######
esphome:
  name: mlock-${name_of_board}
  platform: ESP8266
  board: d1_mini
  on_boot:
    - priority: -100
      then:
        - light.addressable_set: { id: status_led, red: 0%, green: 0%, blue: 100% }
    # - priority: 600
    #   then:
    #     - light.addressable_set: { id: status_led, red: 0%, green: 0%, blue: 50% }

# Enable logging
logger:

api:
  encryption:
    key: $api_enckey

ota:
  password: $ota_password

wifi:
  ssid: $wifi_ssid
  password: $wifi_password
  
  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "$name_of_board Fallback Hotspot"
    password: "PZe2PJENtBiu"

  manual_ip:
    static_ip: $ip_addr
    gateway: 172.23.23.1
    dns1: 172.23.23.1
    subnet: 255.255.255.0

captive_portal:

spi:
  clk_pin: GPIO14
  mosi_pin: GPIO13
  miso_pin: GPIO12

http_request:
  useragent: esphome
  timeout: 2s
  id: http_request_data

globals:
  - id: my_token
    type: std::string
    restore_value: no
  - id: my_tag
    type: std::string
    restore_value: no
  - id: may_switch_output
    type: int
    restore_value: no

rc522_spi:
  cs_pin: GPIO15
  on_tag:
    then:
      - light.addressable_set: { id: status_led, red: 100%, green: 100%, blue: 0% }
      # store the tag id into global variable
      - lambda: |-
          id(my_tag) = x;
      - homeassistant.tag_scanned: !lambda 'return x;'
      # login to vault with role_id to fetch short lived token
      - http_request.post:
          url: https://vault.ctdo.de/v1/auth/approle/login
          headers:
            Content-Type: application/json
          json:
            role_id: $vault_role_id
            secret_id: $vault_secret_id
          verify_ssl: false
          on_response:
            # fetch token from response, store into my_token
            then:
              - lambda: |-
                  json::parse_json(id(http_request_data).get_string(), [](JsonObject root) {
                    id(my_token) = (const char*) root["auth"]["client_token"];
                  });
              # use the token to get json of scanned tag from vault
              - http_request.get:
                  url: !lambda |-
                    return ((std::string) "https://vault.ctdo.de/v1/maschinenlock/" + id(my_tag));
                  headers:
                    X-Vault-Token: !lambda return id(my_token).c_str();
                  verify_ssl: false
                  on_response:
                    then:
                      - if:
                          condition:
                            lambda: 'return status_code == 200;'
                          then: # when found, check if machine is allowed, turn on output or blink LED red
                            - lambda: |-
                                json::parse_json(id(http_request_data).get_string(), [](JsonObject root) {
                                  id(may_switch_output)  = root["data"]["mlock-$name_of_board"];
                                });
                            - if:
                                condition:
                                  lambda: 'return id(may_switch_output);'
                                then:
                                  - if:
                                      condition:
                                        switch.is_on: mlock_${name_of_board}_switch
                                      then: # allowed, but already on, blink once
                                        - light.addressable_set: { id: status_led, red: 0%, green: 0%, blue: 0% }
                                        - delay: 0.5s
                                      else:
                                        - switch.turn_on: mlock_${name_of_board}_switch
                                else: # not allowed, blink quickly
                                  - repeat:
                                      count: 3
                                      then:
                                        - light.addressable_set: { id: status_led, red: 100%, green: 0%, blue: 0% }
                                        - delay: 0.1s
                                        - light.addressable_set: { id: status_led, red: 0%, green: 0%, blue: 0% }
                                        - delay: 0.1s
                          else: # vault returns 404 on missing/unknown Tag so blink LED
                            - repeat:
                                count: 3
                                then:
                                  - light.addressable_set: { id: status_led, red: 100%, green: 0%, blue: 0% }
                                  - delay: 0.5s
                                  - light.addressable_set: { id: status_led, red: 0%, green: 0%, blue: 0% }
                                  - delay: 0.5s
                      - if: # return LED to switch state before
                          condition:
                            switch.is_on: mlock_${name_of_board}_switch
                          then:
                            - light.addressable_set: { id: status_led, red: 0%, green: 100%, blue: 0% }
                          else:
                            - light.addressable_set: { id: status_led, red: 100%, green: 0%, blue: 0% }

# switch component for the output state
switch:
  - platform: gpio
    pin: D1
    name: "Relais Output"
    id: mlock_${name_of_board}_switch
    internal: true # hide from Homeassistant, so no one can turn it on without Tag-Scanning

binary_sensor:
  # sensor input for Turning Device off
  - platform: gpio
    pin:
      number: D3
      inverted: true
      mode: INPUT_PULLUP
    id: ${name_of_board}gpio_input_ausschalter
    on_press:
      - switch.turn_off: mlock_${name_of_board}_switch
      - light.addressable_set: { id: status_led, red: 100%, green: 0%, blue: 0% }

  # a template sensor for showing the current switch state (read only)
  - platform: template
    id: mlock_${name_of_board}_state_output
    name: "${name_of_board} Status Ausgang"
    publish_initial_state: true
    lambda: |-
      return id(mlock_${name_of_board}_switch).state;

# a button element for Homeassistant UI to allow turning off
button:
  - platform: template
    name: "${name_of_board} Ausschalter"
    id: ${name_of_board}_btn_ausschalter
    on_press:
      - switch.turn_off: mlock_${name_of_board}_switch
      - light.addressable_set: { id: status_led, red: 100%, green: 0%, blue: 0% }

light:
  - platform: neopixelbus
    type: GRB
    variant: WS2812
    pin: D4
    name: status_led
    id: status_led
    num_leds: 1
    internal: true