Serial text string problem

Configuration
1

Hello
I’m trying to receive data string from my powermeter in my hassio with serial sensor

the power meter sends this string

490.74,235.27,3.05,0.68, 726.72,233.05,3.67,0.85, 208.93,235.24,1.14,0.78, 17864.96,84042.15
every second


  - platform: serial
    serial_port: /dev/ttyUSB0
    baudrate: 115200

  - platform: template
    sensors:

      my_powermeter_sensor_l1w:
        friendly_name: L1_W
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(',')[1] | float }}"
      my_powermeter_sensor_l1v:
        friendly_name: L1_V
        unit_of_measurement: "V"
        value_template: "{{ states('sensor.serial_sensor').split(',')[2] | float }}"
      my_powermeter_sensor_l1a:
        friendly_name: L1_A
        unit_of_measurement: "A"
        value_template: "{{ states('sensor.serial_sensor').split(',')[3] | float }}"
      my_powermeter_sensor_l1cosphi:
        friendly_name: L1_cosphi
        unit_of_measurement: "Q"
        value_template: "{{ states('sensor.serial_sensor').split(',')[4] | float }}"   
      my_powermeter_sensor_l2w:
        friendly_name: L2_W
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(',')[5] | float }}"
      my_powermeter_sensor_l2v:
        friendly_name: L2_V
        unit_of_measurement: "V"
        value_template: "{{ states('sensor.serial_sensor').split(',')[6] | float }}"
      my_powermeter_sensor_l2a:
        friendly_name: L2_A
        unit_of_measurement: "A"
        value_template: "{{ states('sensor.serial_sensor').split(',')[7] | float }}"
      my_powermeter_sensor_l2cosphi:
        friendly_name: L2_cosphi
        unit_of_measurement: "Q"
        value_template: "{{ states('sensor.serial_sensor').split(',')[8] | float }}"        
      my_powermeter_sensor_l3w:
        friendly_name: L3_W
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(',')[9] | float }}"
      my_powermeter_sensor_l3v:
        friendly_name: L3_V
        unit_of_measurement: "V"
        value_template: "{{ states('sensor.serial_sensor').split(',')[10] | float }}"
      my_powermeter_sensor_l3a:
        friendly_name: L3_A
        unit_of_measurement: "A"
        value_template: "{{ states('sensor.serial_sensor').split(',')[11] | float }}"
      my_powermeter_sensor_l3cosphi:
        friendly_name: L3_cosphi
        unit_of_measurement: "Q"
        value_template: "{{ states('sensor.serial_sensor').split(',')[12] | float }}" 
      my_powermeter_sensor_whout:
        friendly_name: WH_out
        unit_of_measurement: "Wh"
        value_template: "{{ states('sensor.serial_sensor').split(',')[13] | float }}"
      my_powermeter_sensor_whin:
        friendly_name: Wh_in
        unit_of_measurement: "Wh"
        value_template: "{{ states('sensor.serial_sensor').split(',')[14] | float }}"

but in the states all I get is an unavailable
log:
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L2_A: UndefinedError: list object has no element 7
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template Wh_in: UndefinedError: list object has no element 14
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L2_cosphi: UndefinedError: list object has no element 8
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L3_W: UndefinedError: list object has no element 9
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L1_A: UndefinedError: list object has no element 3
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L1_W: UndefinedError: list object has no element 1
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L3_V: UndefinedError: list object has no element 10
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L3_A: UndefinedError: list object has no element 11
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L1_cosphi: UndefinedError: list object has no element 4
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L2_W: UndefinedError: list object has no element 5
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L3_cosphi: UndefinedError: list object has no element 12
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template WH_out: UndefinedError: list object has no element 13
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L2_V: UndefinedError: list object has no element 6
2020-03-26 15:58:10 ERROR (MainThread) [homeassistant.components.template.sensor] Could not render template L1_V: UndefinedError: list object has no element 2

thank you

2

Try this in the template tool at developer tools > template and share the output:

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

Looks like it’s being read as a list instead of a string (you’d know if you see output like ['490.74', '235.27', ... ]. If that’s true, this should work:

{{ states('sensor.serial_sensor')[0] }}

That should return the first value in the list. Also, converting to float in your templates won’t do anything since it’ll just get converted back to a string anyway.

3

Your sample data contains 14 comma-delimited numbers. When converted to a list, the items in that list are referenced from 0 to 13. In other words, you reference the 14th item with [13] and not [14].

However, that’s not the reason for all those error messages you’re getting. It seems like sometimes the serial sensor’s value, after conversion to a list, contains nothing.

4

Some of the list items have a leading space (like ' 726.72'). I think the float filter is being used to remove the leading space.

5

Just add an availability template to the sensor and it’ll get rid of the errors. But you’ll start seeing ‘unavailable’ when the sensor doesn’t have a list.

{{ states('sensor.serial_sensor').split(',') | length > 1 }}

or

{{ ',' in states('sensor.serial_sensor') }}
6

I delete this bit of code from configuration.yaml sensor: witch did not work anyway and the data apear.

  - platform: modbus
    registers:
      - name: porttcp
        hub: mc760
        
      unit_of_measurement: °C
        slave: 1
        register: 40207

corrected code looks like this

  - platform: serial
    serial_port: /dev/ttyUSB0
    baudrate: 115200

  - platform: template
    sensors:

      my_powermeter_sensor_l3w:
        friendly_name: L3_W
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(',')[0] | float }}"
      my_powermeter_sensor_l3v:
        friendly_name: L3_V
        unit_of_measurement: "V"
        value_template: "{{ states('sensor.serial_sensor').split(',')[1] | float }}"
      my_powermeter_sensor_l3a:
        friendly_name: L3_A
        unit_of_measurement: "A"
        value_template: "{{ states('sensor.serial_sensor').split(',')[2] | float }}"
      my_powermeter_sensor_l3cosphi:
        friendly_name: L3_cosphi
        unit_of_measurement: "Q"
        value_template: "{{ states('sensor.serial_sensor').split(',')[3] | float }}" 
        
      my_powermeter_sensor_l2w:
        friendly_name: L2_W
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(',')[4] | float }}"
      my_powermeter_sensor_l2v:
        friendly_name: L2_V
        unit_of_measurement: "V"
        value_template: "{{ states('sensor.serial_sensor').split(',')[5] | float }}"
      my_powermeter_sensor_l2a:
        friendly_name: L2_A
        unit_of_measurement: "A"
        value_template: "{{ states('sensor.serial_sensor').split(',')[6] | float }}"
      my_powermeter_sensor_l2cosphi:
        friendly_name: L2_cosphi
        unit_of_measurement: "Q"
        value_template: "{{ states('sensor.serial_sensor').split(',')[7] | float }}" 
        
      my_powermeter_sensor_l1w:
        friendly_name: L1_W
        unit_of_measurement: "W"
        value_template: "{{ states('sensor.serial_sensor').split(',')[8] | float }}"
      my_powermeter_sensor_l1v:
        friendly_name: L1_V
        unit_of_measurement: "V"
        value_template: "{{ states('sensor.serial_sensor').split(',')[9] | float }}"
      my_powermeter_sensor_l1a:
        friendly_name: L1_A
        unit_of_measurement: "A"
        value_template: "{{ states('sensor.serial_sensor').split(',')[10] | float }}"
      my_powermeter_sensor_l1cosphi:
        friendly_name: L1_cosphi
        unit_of_measurement: "Q"
        value_template: "{{ states('sensor.serial_sensor').split(',')[11] | float }}" 

      my_powermeter_sensor_whout:
        friendly_name: WH_out
        unit_of_measurement: "Wh"
        value_template: "{{ states('sensor.serial_sensor').split(',')[12] | float }}"
      my_powermeter_sensor_whin:
        friendly_name: Wh_in
        unit_of_measurement: "Wh"
        value_template: "{{ states('sensor.serial_sensor').split(',')[13] | float }}"         
        
 #       // 490.74,235.27,3.05,0.68,  726.72,233.05,3.67,0.85,  208.93,235.24,1.14,0.78,  17864.96,84042.15

thanks everyone

7

powermeter
powermeter1467×1142 205 KB

8

That didn’t work because your spacing is way off. This must have cascaded into your other setup.

This would be the correct spacing.

  - platform: modbus
    registers:
      - name: porttcp
        hub: mc760
        unit_of_measurement: °C
        slave: 1
        register: 40207