Shelly PM Mini Gen3

Generation 3 of Shelly Mini. With Powermeter. Flashsize is 8MB.

Serial Pinout

The UART Pinout is the same as other Shelly Plus Mini.

Pin	Colour
Reset	Brown
3v3	Red
RX	Blue
TX	Yellow
BootSEL	Purple
GND	Black

To enter bootloader mode, BootSEL needs to be pulled down (connected to ground).

GPIO Pinout

Pin	Function
GPIO3	NTC
GPIO6	BL0942 TX
GPIO7	BL0942 RX
GPIO0	LED
GPIO1	Button

Basic Configuration

esphome:
  name: "pm-mini-gen3"
  friendly_name: "Shelly PM Mini Gen3"
  platformio_options:
    board_build.flash_mode: dio

esp32:
  board: esp32-c3-devkitm-1
  flash_size: 8MB
  framework:
    type: esp-idf
    version: recommended
    sdkconfig_options:
      COMPILER_OPTIMIZATION_SIZE: y

wifi:
  ap:

logger:

api:

ota:

time:
  - platform: homeassistant

captive_portal:

sensor:
  - platform: ntc
    sensor: temp_resistance_reading
    name: "Temperature"
    unit_of_measurement: "°C"
    accuracy_decimals: 1
    icon: "mdi:thermometer"
    calibration:
      b_constant: 3350
      reference_resistance: 10kOhm
      reference_temperature: 298.15K
  - platform: resistance
    id: temp_resistance_reading
    sensor: temp_analog_reading
    configuration: DOWNSTREAM
    resistor: 10kOhm
  - platform: adc
    id: temp_analog_reading
    pin: GPIO3
    attenuation: 12db

  - platform: bl0942
    uart_id: uart_0
    voltage:
      name: "Voltage"
      id: bvoltage
      icon: mdi:alpha-v-circle-outline
      device_class: voltage
    current:
      name: "Current"
      id: bcurrent
      icon: mdi:alpha-a-circle-outline
      device_class: current
    power:
      name: "Power"
      id: bpower
      icon: mdi:transmission-tower
      device_class: power
    energy:
      name: "Energy"
      id: benergy
      icon: mdi:lightning-bolt
      device_class: energy
    frequency:
      name: "Frequency"
      id: bfreq
      accuracy_decimals: 2
      icon: mdi:cosine-wave
      device_class: frequency
    update_interval: 5s

uart:
  id: uart_0
  tx_pin: GPIO6
  rx_pin: GPIO7
  baud_rate: 9600
  stop_bits: 1

status_led:
  pin:
    number: 0
    inverted: true

binary_sensor:
  - platform: gpio
    name: "Button"
    pin:
      number: 1
      inverted: yes
      mode:
        input: true
        pullup: true

Total Daily Energy Sensor

sensor:
  - platform: total_daily_energy
    name: "Total Daily Energy"
    power_id: bpower
    icon: mdi:meter-electric
    unit_of_measurement: "kWh"
    state_class: total_increasing
    device_class: energy
    accuracy_decimals: 3
    filters:
      - multiply: 0.001