trimetric-mqtt

Trimetric solar meter data logging

Read serial data from a Trimetic meter and publich to MQTT. Using Rasperry pi.

I switched to using an ESP8266 and ESPhome. I am including the files here.

Getting started

• I installed in a python3 virtualenv using Python 3
• Uses paho.mqtt
• Uses pyserial
• A custom cable to interface the 5v Trimetric serial output to the 3.3V Raspberry pi GPIO
• Read TM2025-TM2030 Technical Information On Serial Data Output_0.pdf

Home Assistant configuration.yaml Example

sensor:
  - platform: mqtt
    name: Trimetric Volts
    state_topic: "trimetric/trimetric/V"
    unit_of_measurement: 'V'
  - platform: mqtt
    name: Trimetric Filtered Volts
    state_topic: "trimetric/trimetric/FV" 
    unit_of_measurement: 'V'
  - platform: mqtt
    name: Trimetric Amps
    state_topic: "trimetric/trimetric/A" 
    unit_of_measurement: 'A'
  - platform: mqtt
    name: Trimetric Filtered Amps
    state_topic: "trimetric/trimetric/FA"
    unit_of_measurement: 'A'
  - platform: mqtt
    name: Trimetric Amp Hours from full
    state_topic: "trimetric/trimetric/AH" 
    unit_of_measurement: 'AH'
  - platform: mqtt
    name: Trimetric Charge State
    state_topic: "trimetric/trimetric/%" 
    unit_of_measurement: '%'
  - platform: mqtt
    name: Trimetric Watts
    state_topic: "trimetric/trimetric/W"
    unit_of_measurement: 'W'
  - platform: mqtt
    name: Trimetric Days Since Charged
    state_topic: "trimetric/trimetric/DSC"
    unit_of_measurement: Days
  - platform: mqtt
    name: Trimetric Days Since Equalized
    state_topic: "trimetric/trimetric/DSE"
    unit_of_measurement: 'Days'
  - platform: mqtt
    name: Trimetric X
    state_topic: "trimetric/trimetric/X"

Home Assistant lovelace.yaml Example

  - title: Solar
    cards:
      - type: entities
        title: Solar
        show_header_toggle: false
        entities:
          - sensor.trimetric_volts
          - sensor.trimetric_filtered_volts
          - sensor.trimetric_amps
          - sensor.trimetric_filtered_amps
          - sensor.trimetric_amp_hours_from_full
          - sensor.trimetric_watts
          - sensor.trimetric_charge_state
          - sensor.trimetric_days_since_charged
          - sensor.trimetric_days_since_equalized
          - sensor.trimetric_x
      - type: history-graph
        hours_to_show: 48
        refresh_interval: 10
        entities:
          - sensor.trimetric_volts
          - sensor.trimetric_filtered_volts
          - sensor.trimetric_amps
          - sensor.trimetric_filtered_amps
          - sensor.trimetric_amp_hours_from_full
          - sensor.trimetric_watts

References

• trimetric Trimetric meter
• Adafruit TTL to USB serial port. May still require a RJ-11 breakout cable.