Help adding new device (Voldt EV Charger "hidden" entities)

[fmckeogh]

I purchased the following charger: Voldt® 3 Pin EV granny charger | 8A - 13A | 2,8kW +APP

Here are photographs of the internals (6 screws behind the rear information sticker):

I found the following DPs from the Home Assistant logs:

[
    {
        "id": 1,
        "name": "forward_energy_total",
        "type": "Integer",
        "format": "{\"unit\":\"kW\u00b7h\",\"min\":0,\"max\":99999999,\"scale\":2,\"step\":1}",
        "enumMap": {}
    },
    {
        "id": 3,
        "name": "work_state",
        "type": "Enum",
        "format": "{\"range\":[\"charger_free\",\"charger_insert\",\"charger_free_fault\",\"charger_wait\",\"charger_charging\",\"charger_pause\",\"charger_end\",\"charger_fault\"]}",
        "enumMap": {}
    },
    {
        "id": 4,
        "name": "charge_cur_set",
        "type": "Integer",
        "format": "{\"unit\":\"A\",\"min\":1,\"max\":255,\"scale\":0,\"step\":1}",
        "enumMap": {}
    },
    {
        "id": 5,
        "name": "sigle_phase_power",
        "type": "Integer",
        "format": "{\"unit\":\"kW\",\"min\":0,\"max\":99999999,\"scale\":3,\"step\":1}",
        "enumMap": {}
    },
    {
        "id": 9,
        "name": "power_total",
        "type": "Integer",
        "format": "{\"unit\":\"kW\",\"min\":0,\"max\":99999999,\"scale\":3,\"step\":1}",
        "enumMap": {}
    },
    {
        "id": 14,
        "name": "work_mode",
        "type": "Enum",
        "format": "{\"range\":[\"charge_now\",\"charge_pct\",\"charge_energy\",\"charge_schedule\"]}",
        "enumMap": {}
    },
    {
        "id": 15,
        "name": "balance_energy",
        "type": "Integer",
        "format": "{\"unit\":\"kW\u00b7h\",\"min\":0,\"max\":99999999,\"scale\":2,\"step\":1}",
        "enumMap": {}
    },
    {
        "id": 16,
        "name": "clear_energy",
        "type": "Boolean",
        "format": "{}",
        "enumMap": {}
    },
    {
        "id": 17,
        "name": "energy_charge",
        "type": "Integer",
        "format": "{\"unit\":\"kW\u00b7h\",\"min\":1,\"max\":2000000,\"scale\":2,\"step\":1}",
        "enumMap": {}
    },
    {
        "id": 18,
        "name": "switch",
        "type": "Boolean",
        "format": "{}",
        "enumMap": {}
    },
    {
        "id": 24,
        "name": "temp_current",
        "type": "Integer",
        "format": "{\"unit\":\"\u2103\",\"min\":-40,\"max\":200,\"scale\":0,\"step\":1}",
        "enumMap": {}
    },
    {
        "id": 25,
        "name": "charge_energy_once",
        "type": "Integer",
        "format": "{\"unit\":\"kW\u00b7h\",\"min\":1,\"max\":999999,\"scale\":2,\"step\":1}",
        "enumMap": {}
    }
]

And I have started a PR adding a new device YAML but I have a few questions:

1. I added the Voldt charger using the Junsun charger configuration, and there are entities that work despite not being in the list of Voldt DPs (connectivity for example), is there some way of scraping the full list of supported DPs?
2. Is there an easy way to test my YAML or do I have to add my repo through HACS, delete and re-enroll the device each time I want to change?
3. I want the following behavior: I plug my car in every time I park, but it only turns on during certain hours (cheap tariff). I have set a Home Assistant automation to turn it on and off at the correct times, except it always turns on when I plug my car in. Is there documentation of all the different modes and their behaviors?

Thanks!

[fmckeogh]

I'm also not sure how to find the device ID, when I download diagnostics it gets redacted?

[make-all]

You must know the device ID to have configured it. Yes, in diagnostics it is redacted, because the point of diagnostics is to be able to send it with bug reports and not have to worry about leaking info that could be useful for hackers. But it should be logged at INFO and below levels, so you can probably see it in a debug log. Or it will be listed in the platform.tuya.com.

[make-all]

You need to download the "Query Things Data Model" cloud API result from platform.tuya.com API explorer. That will list all of the dps, including the ones normally hidden from the cloud API because they are non-standard additions by the device manufacturer.

[fmckeogh]

Thanks! I'll have a PR soon:)

[fmckeogh]

Answer for 2, editing the YAML directly on the deployment, deleting then re-adding the device works, no need to reboot or restart Home Assistant. Pretty quick way to make changes and test them.

[make-all]

Probably reloading the integration will work also then.

[fmckeogh]

Answer for 3:

The on/off switch controls the "current" charge, it's not an on/off switch for the whole device. However, if you set it to scheduled mode (and I don't know how a schedule would even be set), it never charges even when plugged in. So I can achieve the "plug car in at any time, but only charge during cheap periods" by switching between "immediate" (always charges as soon as plugged in) and "scheduled" (never charges) work modes.

[lloydian]

I have purchased same charging cable and would love to get this working in HA. I would be grateful for a bit of help. Despite hunting for several step by step guides, I haven't come up with anything so far. I have installed TUYA local integration, I have the VOLDT app working and communicating with the charger but when I attempt to add the charger to the tuya local integration with the QR code, the voldt app says I am using the wrong app. I cannot see the charger in my smart life app. I kind of need the few steps before the start of this thread. grateful if someone could point me in the right direction.

[fmckeogh]

@lloydian I'm afraid I never installed the Voldt app, I only every used the "Tuya- Smart Life, Smart Living" iOS app. I paired the device using the normal "add device" process in the Tuya app, adding it to my local network. Then I followed the tuya-local setup, entering the code from the Tuya app, then scanning the tuya-local QR code from the barcode reader icon in the top left of the Tuya iOS app, and tuya-local correctly imported all my devices.

[lloydian]

Thanks @fmckeogh you comments still helped. I had initially tried to pair with the Tuya Smart Life app but couldn't get the charger to pair. I re-tried and the most difficult part was getting the smart charger back into pairing mode after having paired it once. Once I re-paired with the Tuya native app, it was straightforward.

For reference to get the unit back into pairing mode:-

1. Power off
2. Power on and wait for startup to complete
3. Tap twice quickly on the button withough changing the charging current
4. Wait 2 seconds
5. Repeat from step 3
   (I think 3-4 times and the network icon started flashing indicating pairing.

Next Newbie question - how do I use your DPs above? In the device info that I can now see in HA, I see Current and Voltage as unavailable. Any ideas on how to correct this?

[fmckeogh]

@lloydian No problem, current and voltage become available as soon as a charging session is started.