ESPhome config for P1 shield on wemos

p1.ymal

#based on https://github.com/zuidwijk/dsmr/blob/main/slimmelezer.yaml

substitutions:
  device_name: slimmelezer
  device_description: "DIY P1 module to read your smart meter"

esphome:
  name: ${device_name}
  comment: "${device_description}"
  platform: ESP8266
  esp8266_restore_from_flash: true
  board: d1_mini
  name_add_mac_suffix: false
  on_boot:
    then:
      - if:
          condition:
            lambda: return id(has_key);
          then:
            - lambda: |-
                std::string key(id(stored_decryption_key), 32);
                id(dsmr_instance).set_decryption_key(key);
          else:
            - logger.log:
                level: info
                format: "Not using decryption key. If you need to set a key use Home Assistant service 'ESPHome:  ${device_name}_set_dsmr_key'"

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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: ${device_name}

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:
  services:
    service: set_dsmr_key
    variables:
      private_key: string
    then:
      - logger.log:
          format: Setting private key %s. Set to empty string to disable
          args: [private_key.c_str()]
      - globals.set:
          id: has_key
          value: !lambda "return private_key.length() == 32;"
      - lambda: |-
          if (private_key.length() == 32)
            private_key.copy(id(stored_decryption_key), 32);
          id(dsmr_instance).set_decryption_key(private_key);

ota:
  password: "96d09378070fe355a89c33a5e11fe8af"

web_server:
  port: 80

uart:
  baud_rate: 115200
  rx_pin: GPIO3
  tx_pin: GPIO12

globals:
  - id: has_key
    type: bool
    restore_value: yes
    initial_value: "false"
  - id: stored_decryption_key
    type: char[32]
    restore_value: yes
  
dsmr:
  id: dsmr_instance

sensor:
  - platform: dsmr
    energy_delivered_tariff1:
      name: "Energy Consumed Tariff 1"
      state_class: "total_increasing"
    energy_delivered_tariff2:
      name: "Energy Consumed Tariff 2"
      state_class: "total_increasing"
    power_delivered:
      name: "Power Consumed"
      accuracy_decimals: 0
      filters:
        - multiply: 1000
    voltage_l1:
      name: "Voltage Phase 1"
    voltage_l2:
      name: "Voltage Phase 2"
    voltage_l3:
      name: "Voltage Phase 3"
    current_l1:
      name: "Current Phase 1"
    current_l2:
      name: "Current Phase 2"
    current_l3:
      name: "Current Phase 3"
    power_delivered_l1:
      name: "Power Consumed Phase 1"
      accuracy_decimals: 0
      filters:
        - multiply: 1000
    power_delivered_l2:
      name: "Power Consumed Phase 2"
      accuracy_decimals: 0
      filters:
        - multiply: 1000
    power_delivered_l3:
      name: "Power Consumed Phase 3"
      accuracy_decimals: 0
      filters:
        - multiply: 1000
    gas_delivered:
      name: "Gas Consumed"
      state_class: "total_increasing"
  - platform: uptime
    name: "Uptime"
  - platform: wifi_signal
    name: "Wi-Fi Signal"
    update_interval: 60s

text_sensor:
  - platform: dsmr
    identification:
      name: "DSMR Identification"
    p1_version:
      name: "DSMR Version"
  - platform: wifi_info
    ip_address:
      name: "IP Address"
    ssid:
      name: "Wi-Fi SSID"
    bssid:
      name: "Wi-Fi BSSID"