Lilygo SIM800L esphome

config.yml

esphome:
  name: esp-gsm
  friendly_name: esp-gsm

esp32:
  board: esp32dev
  framework:
    type: arduino

uart:
  baud_rate: 9600
  tx_pin: TX
  rx_pin: RX

logger:
  baud_rate: 0  

# Enable Home Assistant API
api:
  encryption:
    key: "..."
  actions:
    - action: send_sms
      variables:
        recipient: string
        message: string
      then:
        - sim800l.send_sms:
            recipient: !lambda 'return recipient;'
            message: !lambda 'return message;'
    - action: dial
      variables:
        recipient: string
      then:
        - sim800l.dial:
            recipient: !lambda 'return recipient;'
    - action: connect
      then:
        - sim800l.connect
    - action: disconnect
      then:
        - sim800l.disconnect
    - action: send_ussd
      variables:
        ussdCode: string
      then:
        - sim800l.send_ussd:
            ussd: !lambda 'return ussdCode;'
  
ota:
  - platform: esphome
    password: "..."

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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esp-Gsm Fallback Hotspot"
    password: "rPUmGQdlUuwA"

captive_portal:

light:
  - platform: status_led
    name: "LED status"
    pin: GPIO13
    id: led

sensor:
  - platform: sim800l
    rssi:
      name: "Sim800L RSSI"

binary_sensor:
  - platform: sim800l
    registered:
      name: "Sim800L Registered"

text_sensor:
  - platform: template
    id: caller_id_text_sensor
    name: "Caller ID"
  - platform: template
    id: ussd_message
    name: "USSD Code"

sim800l:
  on_incoming_call:
    - logger.log:
        format: "Incoming call from '%s'"
        args: ["caller_id.c_str()"]
    - lambda: |-
        id(caller_id_text_sensor).publish_state(caller_id);
        id(led).turn_on();
    - sim800l.disconnect
    - homeassistant.event:
        event: esphome.incoming_call_event
        data:
          payload: !lambda 'return id(caller_id_text_sensor).state;'
  on_ussd_received:
    - lambda: |-
        id(ussd_message).publish_state(ussd);

switch:
  - platform: gpio
    name: "SIM800_PWKEY"
    pin: 4
    restore_mode: ALWAYS_OFF
  - platform: gpio
    name: "SIM800_POWER"
    pin: 23
    restore_mode: ALWAYS_ON
  - platform: gpio
    name: "SIM800_RST"
    pin: 5
    restore_mode: ALWAYS_ON