Shelly Plus 1PM

GPIO Pinout

Pin	Function
GPIO0	LED (Inverted)
GPIO4	Switch input
GPIO5	BL0937 CF
GPIO18	BL0937 CF1
GPIO19	Future external sensors?
GPIO23	BL0937 SEL (Inverted)
GPIO25	Button (Inverted, Pull-up)
GPIO26	Relay
GPIO32	NTC
GPIO33	Relay supply voltage sensor

The Shelly Plus 1PM is based on the ESP32-U4WDH (Single core, 160MHz, 4MB embedded flash)

Please calibrate the NTC and the voltage / power measurements, the values below are just a rough estimate!

Credit and thanks to

• https://templates.blakadder.com/shelly_plus_1.html

Configuration as relay with overpower and overtemperature protection

substitutions:
  device_name: "Shelly Plus 1PM"
  # Higher value gives lower watt readout
  current_res: "0.001"
  # Lower value gives lower voltage readout
  voltage_div: "1925"

esphome:
  name: shelly-plus-1pm
  platformio_options:
    board_build.f_cpu: 160000000L

esp32:
  board: esp32doit-devkit-v1
  framework:
    type: esp-idf
    sdkconfig_options:
      CONFIG_FREERTOS_UNICORE: y
      CONFIG_ESP32_DEFAULT_CPU_FREQ_160: y
      CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ: "160"

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

logger:

api:
  encryption:
    key: !secret api_encryption_key

ota:
  password: !secret ota_password

time:
  - platform: homeassistant

output:
  - platform: gpio
    id: "relay_output"
    pin: GPIO26

switch:
  - platform: output
    id: "relay"
    name: "${device_name} Relay"
    output: "relay_output"

binary_sensor:
  - platform: gpio
    name: "${device_name} Switch"
    pin: GPIO4
    on_press:
      then:
        - switch.turn_on: "relay"
    on_release:
      then:
        - switch.turn_off: "relay"
    filters:
      - delayed_on_off: 50ms

sensor:
  - platform: ntc
    sensor: temp_resistance_reading
    name: "${device_name} Temperature"
    unit_of_measurement: "°C"
    accuracy_decimals: 1
    icon: "mdi:thermometer"
    calibration:
      b_constant: 3350
      reference_resistance: 10kOhm
      reference_temperature: 298.15K
    on_value_range:
      - above: "80.0"
        then:
          - switch.turn_off: "relay"
  - platform: resistance
    id: temp_resistance_reading
    sensor: temp_analog_reading
    configuration: DOWNSTREAM
    resistor: 10kOhm
  - platform: adc
    id: temp_analog_reading
    pin: GPIO32
    attenuation: 12db

  - platform: adc
    name: "${device_name} Relay Supply Voltage"
    pin: GPIO33
    attenuation: 12db
    filters:
      - multiply: 8

  - platform: hlw8012
    model: BL0937
    sel_pin:
      number: GPIO23
      inverted: true
    cf_pin: GPIO5
    cf1_pin: GPIO18
    current_resistor: ${current_res}
    voltage_divider: ${voltage_div}
    current:
      name: "${device_name} Current"
      unit_of_measurement: A
      accuracy_decimals: 3
      icon: mdi:flash-outline
    voltage:
      name: "${device_name} Voltage"
      unit_of_measurement: V
      accuracy_decimals: 1
      icon: mdi:flash-outline
    power:
      name: "${device_name} Power"
      unit_of_measurement: W
      id: power
      icon: mdi:flash-outline
      on_value_range:
        - above: "3600"
          then:
            - switch.turn_off: "relay"
    change_mode_every: 2
    update_interval: 10s
  - platform: total_daily_energy
    name: "${device_name} Daily energy consumed"
    power_id: power
    filters:
      - multiply: 0.001
    unit_of_measurement: kWh
    icon: mdi:clock-alert

status_led:
  pin:
    number: GPIO0
    inverted: true