esp8266_p1meter
Software for the ESP2866 that sends P1 smart meter data to an mqtt broker (with OTA firmware updates)
08-05-2021: I've not used this sketch myself for several years now and as such it became a bit outdated: It supports only older meters with version 2.2 and 2.0 and the development has halted. I recommend people with newer meters to have a look at this fork instead.
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
As I don't have solar panels (yet) I do not collect the data for power returns as I don't have any. They are however easy to add if you know the codes used.
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 }}"
- platform: mqtt
name: P1 Consumption High Tarif
unit_of_measurement: 'kWh'
state_topic: "sensors/power/p1meter/consumption_high_tarif"
value_template: "{{ value|float / 1000 }}"
- platform: mqtt
name: P1 Actual Power Consumption
unit_of_measurement: 'kW'
state_topic: "sensors/power/p1meter/actual_consumption"
value_template: "{{ value|float / 1000 }}"
- platform: mqtt
name: P1 Instant Power Usage
unit_of_measurement: 'kW'
state_topic: "sensors/power/p1meter/instant_power_usage"
value_template: "{{ value|float / 1000 }}"
- platform: mqtt
name: P1 Instant Power Current
unit_of_measurement: 'A'
state_topic: "sensors/power/p1meter/instant_power_current"
value_template: "{{ value|float / 1000 }}"
- platform: mqtt
name: P1 Gas Usage
unit_of_measurement: 'm3'
state_topic: "sensors/power/p1meter/gas_meter_m3"
value_template: "{{ value|float / 1000 }}"
- 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"
- platform: mqtt
name: P1 Long Power Outages
state_topic: "sensors/power/p1meter/long_power_outages"
- platform: mqtt
name: P1 Short Power Drops
state_topic: "sensors/power/p1meter/short_power_drops"
- platform: mqtt
name: P1 Short Power Peaks
state_topic: "sensors/power/p1meter/short_power_peaks"
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/