Serial output from energy monitor into HA raspberry pi

Configuration
1

Hi

I’m trying to get serial data from this energy monitor to work in HA, I have tested and can read the output using raspbian, but on my pi4 I am using HA OS

It outputs like this:

"pi@raspberrypi:~ $ cat /dev/ttyAMA0

11 2.94 12.55 0.05 244.34 0.159 1.20 8.29 0.03 244.20 0.121 16.25 30.73 0.13 244.31 0.521"

Which according to the documentation is:

NodeID Realpower1 ApparentPower1 Irms1 Vrms1 PowerFactor1 Realpower2 ApparentPower2 Irms2 Vrms2 PowerFactor2 Realpower3 ApparentPower3 Irms3 Vrms3 PowerFactor3

my yaml config looks like this:

  - platform: serial
    serial_port: /dev/ttyAMA0
    baudrate: 115200

  - platform: template
    sensors:
      my_nodeid_sensor:
        friendly_name: NodeID
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[1] | float }}"
      my_realpower1_sensor:
        friendly_name: Realpower1
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[2] | float }}"
      my_apparentpower1_sensor:
        friendly_name: ApparentPower1
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[3] | float }}"
      my_lrms1_sensor:
        friendly_name: Irms1
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[4] | float }}"
      my_vrms1_sensor:
        friendly_name: Vrms1
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[5] | float }}"
      my_powerfactor1_sensor:
        friendly_name: PowerFactor1
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[6] | float }}"
      my_realpower2_sensor:
        friendly_name: Realpower2
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[7] | float }}"
      my_apparentpower2_sensor:
        friendly_name: ApparentPower2
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[8] | float }}"
      my_lrms2_sensor:
        friendly_name: Irms2
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[9] | float }}"
      my_vrms2_sensor:
        friendly_name: Vrms2
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[10] | float }}"
      my_powerfactor2_sensor:
        friendly_name: PowerFactor2
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[11] | float }}"
      my_realpower3:
        friendly_name: Realpower3
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[12] | float }}"
      my_apparentpower3_sensor:
        friendly_name: ApparentPower3
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[13] | float }}"
      my_lrms3_sensor:
        friendly_name: Irms3
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[14] | float }}"
      my_vrms3_sensor:
        friendly_name: Vrms3
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[15] | float }}"
      my_powerfactor3_sensor:
        friendly_name: PowerFactor3
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(' ')[16] | float }}"

If I enter

 {{ states('sensor.serial_sensor') }}

Into developer tools - template, I get:

Result type: string
 
 unknown

It seems that it is not reading the serial data at all for some reason, I have spent hours trying to figure this out!

2

Please please post your code properly.

3

Is that better?

4

Thank you yes

5

How big does that serial output get? There are 90 characters in the sample output. You are getting close to the 128 char limit for a sensor.

Does the user running HA have access to the serial device?

Is the serial device definitely at /dev/AMA0?

6

The creator of the energy monitor has just written a guide after contacting them which has solved my issue!

http://lechacal.com/wiki/index.php?title=Homeassistant

1 Like