hi i finally got a fuel sending unit to work had some help and then needed to figure out some attenuation
but i wanna a make a fuel gauge card 0% to 100%
either i wanna use the voltage or ohms
voltage
2.25v to 0%
0.74v to 100%
sensor.esphome_web_a02894_fuel_tank_sensor
or
35 to 100%
260 to 0%
sensor.esphome_web_a02894_fuel_tank_voltage
and i wanna increment by 1 i tried googling and reading others battery templates but i didnt understand it convert,
Note- Anyone who knows me knows that I couldn’t come up with it myself. I cheated and found a similar solution.
Try this in your configuration.yaml:
template:
- sensor:
- name: "Fuel Percentage"
unit_of_measurement: "%"
state: >
{% set voltage = states('sensor.esphome_web_a02894_fuel_tank_sensor')|float(0) %}
{% set min_voltage = 0.74 %}
{% set max_voltage = 2.25 %}
{% set percentage = ((max_voltage - voltage) / (max_voltage - min_voltage)) * 100 %}
{{ [0, percentage, 100]|sort|join(' ') }}
@stevemann ah any help is good… i tried the other link by tom but that didnt help me made me more confused…
so i tried this… but got error… i change the fuel_tank_sensor to fuel_tank_voltage as the other is for ohms
but i got this error complaining about class or string or something do you happen to know what is neeed?
Error while dispatching event for sensor.esphome_web_a02894_fuel_tank_voltage to <Job track state_changed event {'sensor.esphome_web_a02894_fuel_tank_voltage'} HassJobType.Callback <bound method TrackTemplateResultInfo._refresh of <TrackTemplateResultInfo {Template<template=({% set voltage = states('sensor.esphome_web_a02894_fuel_tank_voltage')|float(0) %} {% set min_voltage = 0.74 %} {% set max_voltage = 2.25 %} {% set percentage = ((max_voltage - voltage) / (max_voltage - min_voltage)) * 100 %} {{ [0, percentage, 100]|sort|join(' ') }}) renders=6>: <RenderInfo Template<template=({% set voltage = states('sensor.esphome_web_a02894_fuel_tank_voltage')|float(0) %} {% set min_voltage = 0.74 %} {% set max_voltage = 2.25 %} {% set percentage = ((max_voltage - voltage) / (max_voltage - min_voltage)) * 100 %} {{ [0, percentage, 100]|sort|join(' ') }}) renders=6> all_states=False all_states_lifecycle=False domains=frozenset() domains_lifecycle=frozenset() entities=frozenset({'sensor.esphome_web_a02894_fuel_tank_voltage'}) rate_limit=None has_time=False exception=None is_static=False>}>>>
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 662, in state
numerical_value = float(value) # type:ignore[arg-type]
^^^^^^^^^^^^
ValueError: could not convert string to float: '0 100.0 100'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/event.py", line 352, in _async_dispatch_entity_id_event
hass.async_run_hass_job(job, event)
File "/usr/src/homeassistant/homeassistant/core.py", line 938, in async_run_hass_job
hassjob.target(*args)
File "/usr/src/homeassistant/homeassistant/helpers/event.py", line 1294, in _refresh
self.hass.async_run_hass_job(self._job, event, updates)
File "/usr/src/homeassistant/homeassistant/core.py", line 938, in async_run_hass_job
hassjob.target(*args)
File "/usr/src/homeassistant/homeassistant/components/template/template_entity.py", line 435, in _handle_results
self.async_write_ha_state()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1005, in async_write_ha_state
self._async_write_ha_state()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1130, in _async_write_ha_state
self.__async_calculate_state()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1067, in __async_calculate_state
state = self._stringify_state(available)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1011, in _stringify_state
if (state := self.state) is None:
^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 664, in state
raise ValueError(
ValueError: Sensor sensor.fuel_percentage has device class 'None', state class 'None' unit '%' and suggested precision 'None' thus indicating it has a numeric value; however, it has the non-numeric value: '0 100.0 100' (<class 'str'>)
The problem is in your error message. “0 100.0 100” is a string of three numbers.
Look at dev tools ->states and see what
sensor.esphome_web_a02894_fuel_tank_sensor
is returning.
I believe the issue is the last template line.
What is it supposed to do?
Why is it not just outputting the percentage?
0 100.0 100 is not a percentage and that makes the template fail I believe
In your esp device sensor config:
sensor:
- platform: adc
pin: GPIOXX
name: "Fuel Tank Sensor"
unit_of_measurement: "%"
filters:
- calibrate_linear:
method: least_squares
datapoints:
- 0.74 -> 100
- 2.25 -> 0
You are correct. Remove the last line. (It was an old example I was looking at).
This is an even better solution. The filter does all the work for you.