Shelly 1PM?

ESPHome
18

Got it wired up today and all is working well; current, voltage, relay, input switch, and temperature!

The calibration of the power sensor is way off, showing 700W for what should be a <100W or so load. I’ll be calibrating this with my diy ‘killer watts’ meter, but otherwise consider this a working shelly 1pm config. Regardless, the sensor is responding properly, so calibration is all that is needed here.

I included some small automations to make the existing toggle style wall switch behave like a standard wall switch (up=on, down=off). I also have node red doing some additional automations based on motion, luminance, and switch position, but that’s out of the scope of this post. Hope this helps someone down the line!

# Shelly 1pm Example#############################

substitutions:
  name: "garage_lights"
  friendly_name: "Garage Lights"

esphome:
  name: ${name}
  platform: ESP8266
  board: esp01_1m

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  
  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "${friendly_name} Fallback Hotspot"
    password: "oops"

# Enable logging
logger:

api:
  password: !secret garage_lights_password

ota:
  password: !secret ota_password

switch:
  - platform: gpio
    name: "${friendly_name} Relay"
    icon: "mdi:power-socket-us"
    pin: GPIO15
    id: relay
    
sensor:
  - platform: wifi_signal
    name: "${friendly_name} WiFi Signal"
    update_interval: 60s
    
  - platform: hlw8012
    cf_pin: GPIO05
    cf1_pin: GPIO13 # not used because it is not available on the 1PM but it is needed to compile
    sel_pin: GPIO14 # not used because it is not available on the 1PM but it is needed to compile
    power:
      name: "${friendly_name} Power"
      unit_of_measurement: W
      id: "${name}_power"
      icon: mdi:flash-circle
      accuracy_decimals: 0
      filters:
      #Reading -> actual
      - calibrate_linear:
          - 2.5 -> 0.16
          - 747.0 -> 125.0
          - 1409.0 -> 237.0
          - 2663.0 -> 444.0
          - 8600.0 -> 1390.0
      - lambda: if (x <= 6.0) return 0; else return (x - 6);
    update_interval: 10s
    
  # NTC Temperature
  - platform: ntc
    sensor: ${name}_resistance_sensor
    name: "${friendly_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: ${name}_resistance_sensor
    sensor: ${name}_source_sensor
    configuration: DOWNSTREAM
    resistor: 32kOhm
  - platform: adc
    id: ${name}_source_sensor
    pin: A0
    update_interval: 10s

binary_sensor:
  - platform: status
    name: "${friendly_name} Status"
  # Binary sensor for the button press
  - platform: gpio
    name: "${friendly_name} Input"
    pin:
      number: GPIO4
    on_state:
      - switch.toggle: relay
    #on_press:
    #  - switch.turn_on: relay
    #on_release:
    #  - switch.turn_off: relay

status_led:
  pin: GPIO0

[edit: Got my calibration done… added it to this config. Incidentally, that’s the farthest off from calibration I’ve ever seen a sensor… not that it means anything, but usually output values are within a few 10% before calibrating, not ~800% off as in this case. Either way, a linear calibration does look valid for the sensor (roughly the same 8x factor across the range).]

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