esp8266_p1meter

Software for the ESP2866 that sends P1 smart meter data to an mqtt broker (with OTA firmware updates)

Connection of the P1 meter to the ESP8266

ESP8266 Pin	P1 Pin
GND	GND
3V3	RTS
DATA (RXD)	D2

To connect my Landys and Gyr E350 (ZCF110), I used a 10K resistor connected between DATA (RXD) and RTS. Many howto's mention RTS requires 5V (VIN) to activate the P1 port, but for me 3V3 suffices.

Data Sent

All metrics are send to their own MQTT topic. The nodemcu sends out to the following MQTT topics:

sensors/power/p1meter/consumption_low_tarif 2209397
sensors/power/p1meter/consumption_high_tarif 1964962
sensors/power/p1meter/actual_consumption 313
sensors/power/p1meter/instant_power_usage 313
sensors/power/p1meter/instant_power_current 1000
sensors/power/p1meter/gas_meter_m3 968922
sensors/power/p1meter/actual_tarif_group 2
sensors/power/p1meter/short_power_outages 3
sensors/power/p1meter/long_power_outages 1
sensors/power/p1meter/short_power_drops 0
sensors/power/p1meter/short_power_peaks 0

This fork has some extra topics for return delivery and dutch 3Phase system

Home Assistant Configuration

I use this for home assistant sensors.yaml:

 - platform: mqtt
   name: P1 Consumption Low Tarif
   unit_of_measurement: 'kWh'
   state_topic: "sensors/power/p1meter/consumption_low_tarif"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:counter
   #
 - platform: mqtt
   name: P1 Delivery Low Tarif
   unit_of_measurement: 'kWh'
   state_topic: "sensors/power/p1meter/delivery_low_tarif"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:counter
   #
 - platform: mqtt
   name: P1 Consumption High Tarif
   unit_of_measurement: 'kWh'
   state_topic: "sensors/power/p1meter/consumption_high_tarif"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:counter
   #
 - platform: mqtt
   name: P1 Delivery High Tarif
   unit_of_measurement: 'kWh'
   state_topic: "sensors/power/p1meter/delivery_high_tarif"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:counter
   #
 - platform: mqtt
   name: P1 Actual Power Consumption
   unit_of_measurement: 'kW'
   state_topic: "sensors/power/p1meter/actual_consumption"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 Actual Power Delivery
   unit_of_measurement: 'kW'
   state_topic: "sensors/power/p1meter/actual_delivery"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 Instant Power Usage
   unit_of_measurement: 'kW'
   state_topic: "sensors/power/p1meter/instant_power_usage"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 L1 Instant Power Current
   unit_of_measurement: 'A'
   state_topic: "sensors/power/p1meter/l1_instant_power_current"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 L2 Instant Power Current
   unit_of_measurement: 'A'
   state_topic: "sensors/power/p1meter/l2_instant_power_current"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 L3 Instant Power Current
   unit_of_measurement: 'A'
   state_topic: "sensors/power/p1meter/l3_instant_power_current"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:speedometer
   #   
 - platform: mqtt
   name: P1 L1 Voltage
   unit_of_measurement: 'V'   
   state_topic: "sensors/power/p1meter/l1_voltage"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 L2 Voltage
   unit_of_measurement: 'V'   
   state_topic: "sensors/power/p1meter/l2_voltage"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 L3 Voltage
   unit_of_measurement: 'V'   
   state_topic: "sensors/power/p1meter/l3_voltage"
   icon: mdi:speedometer
   #
 - platform: mqtt
   name: P1 Gas Usage
   unit_of_measurement: 'm3'
   state_topic: "sensors/power/p1meter/gas_meter_m3"
   value_template: "{{ value|float / 1000 }}"
   icon: mdi:counter
   #
 - platform: mqtt
   name: P1 Actual Tarif Group
   state_topic: "sensors/power/p1meter/actual_tarif_group"
   #
 - platform: mqtt
   name: P1 Short Power Outages
   state_topic: "sensors/power/p1meter/short_power_outages"
   icon: mdi:exclamation
   #
 - platform: mqtt
   name: P1 Long Power Outages
   state_topic: "sensors/power/p1meter/long_power_outages"
   icon: mdi:exclamation
   #
 - platform: mqtt
   name: P1 Short Power Drops
   state_topic: "sensors/power/p1meter/short_power_drops"
   icon: mdi:exclamation
   #
 - platform: mqtt
   name: P1 Short Power Peaks
   state_topic: "sensors/power/p1meter/short_power_peaks"
   icon: mdi:exclamation
   #

The automations are yours to create. And always remember that sending alerts in case of a power outtage only make sense when you own a UPS battery :)

Thanks to

This sketch is mostly copied and pasted from several other projects. Standing on the heads of giants, big thanks and great respect to the writers and/or creators of:

• https://github.com/jantenhove/P1-Meter-ESP8266
• https://github.com/neographikal/P1-Meter-ESP8266-MQTT
• http://gejanssen.com/howto/Slimme-meter-uitlezen/
• https://github.com/rroethof/p1reader/
• http://romix.macuser.nl/software.html
• http://blog.regout.info/category/slimmeter/
• http://domoticx.com/p1-poort-slimme-meter-hardware/