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dracoventions / TWCManager

Control power delivered by a Tesla Wall Charger using two wires screwed into its RS-485 terminals.
The Unlicense
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Stop car from charging #8

Open Tschingis opened 5 years ago

Tschingis commented 5 years ago

Thanks for your great work. This is not directly an issue but more something i found out. As you have written in the code, protocol 2 does not allow to stop a car from charging. Using the car api does not work for me since there are non tesla cars charging at the twc. By accident i have seen that if the twcmanager script was not running, the twc goes into a resumable error state (Green on - 4 Red flashes) and it does not charge the car. It even stops the charge of the car, if you terminate the script during a charge. I made a dirty hack into the script which does not send a master heartbeat to a slave twc if it is not allowed to charge. I cannot test if this hack works with several slaves, i.e. if a slave keeps charging if he receives a heartbeat that is not adressed to him, but in case of one slave (one twc) it reproducable prevents charging of the car. If the heartbeat starts again, the charging of the car resumes.

simotronic commented 5 years ago

That's an interesting observation especially with respect to non-Tesla vehicles. I have been asked to investigate the communications to the vehicle and adding a means where a non-Tesla vehicle can be identified, and potentially qualified to charge. Very applicable in shared parking locations!

infernix commented 5 years ago

@Tschingis would you mind forking this and committing your hack? Or at least paste a diff here?

laur3ns commented 4 years ago

I believe the trouble with this approach is that if the time window in which it is not receiving heartbeats is too long, the TWC and/or car (the latter if I recall) will go into a permanent error state, requiring a re plug to clear.

db9carbon commented 3 years ago

Thanks for your great work. This is not directly an issue but more something i found out. As you have written in the code, protocol 2 does not allow to stop a car from charging. Using the car api does not work for me since there are non tesla cars charging at the twc. By accident i have seen that if the twcmanager script was not running, the twc goes into a resumable error state (Green on - 4 Red flashes) and it does not charge the car. It even stops the charge of the car, if you terminate the script during a charge. I made a dirty hack into the script which does not send a master heartbeat to a slave twc if it is not allowed to charge. I cannot test if this hack works with several slaves, i.e. if a slave keeps charging if he receives a heartbeat that is not adressed to him, but in case of one slave (one twc) it reproducable prevents charging of the car. If the heartbeat starts again, the charging of the car resumes.

I too am looking for this, as using TWC on non-Tesla's too. Can you pls post your code?