Simple Monitor for waveshare ups hat
This fork is adopted to run as a docker container
A service that will check the status of an waveshare ups hat and provide this at a rest API. It is using the waveshare example code.
Just build a package using buildPkg.sh and install it on the Pi. Call
sudo systemctl enable --now usvwatcher
Afterwards you can access the json api
curl localhost:8082/usv | json_pp
You will get an output like:
{
"current" : -0.3938,
"discharging" : true,
"loadVoltage" : 8.076,
"percent" : 86.5,
"power" : 3.402,
"psuVoltage" : 8.03662,
"shuntVoltage" : -0.03938,
"status" : "OK",
"timestamp" : 1643572955.18301
}
By default the service is set up to shutdown the system if the battery level is below 20%. You can change this in the service file.
Home Assistant Integration
The major intent was to integrate this with home assistant To utilize the values there just define a RESTful setup.
Example:
rest:
- scan_interval: 10
resource: http://localhost:8082/usv
sensor:
- name: "RpiUSV_current"
value_template: '{{ value_json.current | round(4) }}'
unit_of_measurement: 'A'
- name: "RpiUSV_loadVoltage"
value_template: '{{ value_json.loadVoltage | round(4)}}'
unit_of_measurement: 'V'
- name: "RpiUSV_power"
value_template: '{{ value_json.power | round(2)}}'
unit_of_measurement: 'W'
- name: "RpiUSV_percent"
value_template: '{{ value_json.percent | round(1) }}'
unit_of_measurement: "%"
binary_sensor:
- name: "RpiUSV_discharge"
value_template: '{{ value_json.discharging }}'
- name: "RpiUSV_warning"
value_template: '{{ True if value_json.percent < 30 }}'
You can add a card to your UI:
