How to change charging amps in increments

[austin202220]

I have the service call working where I can set a specific number, 8 amps for example. How can I change it incrementally instead of using a specific number?

This works:
service: tesla_custom.api
data:
command: CHARGING_AMPS
parameters:
path_vars:
vehicle_id: "3744492401xxxxxx"
charging_amps: "8"

This is the code I am trying but cant get to work. I get 'unknown error'.

service: tesla_custom.api
data:
command: CHARGING_AMPS
parameters:
path_vars:
vehicle_id: "3744492401xxxxxx"
charging_amps: {{ state_attr("sensor.zoomie_charging_rate", "charge_current_request")+1 }}

original source was here:
https://www.reddit.com/r/homeassistant/comments/vngjao/automation_to_vary_ev_charge_rate_based_on_excess/?utm_name=iossmf

[InTheDaylight14]

In v3 there is an entity dedicated to the charger amps. Search for "number.<car_name>_charging_amps if you have that version of the integration added. Check out it's history and see if it would work.

The new service call to increment should look something like this:

service: number.set_value
data:
  value: {{states('number.<car_name>_charging_amps')}} + 1
target:
  entity_id: number.<car_name>_charging_amps

[tonywheeler60]

Just a thought... In the car you can only set whole numbers. Can you set a decimal value of charging amps that the car will accept? I ask out of ignorance but it's something I may want to do when smart enough in HA - to match something close to current excess solar (being exported). I guess that you are aiming to do that?

[austin202220]

I have not tried decimals, but you can lower the charging amps all the way down to 1,2,3,or 4 amps. In the Tesla app the minimum is 5A.