Charger disconnects at midnight

[grinder1337]

What is wrong

Hi there,
I was very happy to find your integration, and after a little work I've managed that it works with solar surplus. But unfortunately it had lost connection at midnight - log says local key or protocol wrong.
Local key hasn't changed, protocol also not.
I have to delete and create it again for working, pasting the actual local key doesn't work.

Charger is an 3 phase 11kw wallbox

Charger model

dé EV Charger

Integration version

Version 2.22.0

Diagnostics

{
  "home_assistant": {
    "arch": "x86_64",
    "dev": false,
    "docker": true,
    "hassio": false,
    "installation_type": "Home Assistant Container",
    "os_name": "Linux",
    "os_version": "6.5.0-44-generic",
    "python_version": "3.14.5",
    "timezone": "Europe/Berlin",
    "version": "2026.6.4",
    "virtualenv": false,
    "container_arch": "amd64",
    "run_as_root": true
  },
  "custom_components": {
    "s7plc": {
      "documentation": "https://github.com/xtimmy86x/ha-s7plc",
      "version": "6.1.0",
      "requirements": [
        "pys7==2.8.2"
      ]
    },
    "get_euda_data": {
      "documentation": "https://github.com/WulfgarW/ha_get_euda_data/blob/main/README.md",
      "version": "0.0.20",
      "requirements": [
        "homeassistant>=2025.6.1"
      ]
    },
    "hass_agent": {
      "documentation": "https://github.com/v1k70rk4/HASS.Agent.NET10-Integration",
      "version": "10.6.0",
      "requirements": []
    },
    "tapo_control": {
      "documentation": "https://github.com/JurajNyiri/HomeAssistant-Tapo-Control",
      "version": "7.1.25",
      "requirements": [
        "pytapo==3.4.18",
        "python-kasa[speedups]==0.10.2"
      ]
    },
    "my_pv": {
      "documentation": "https://github.com/my-PV/home-assistant-integration",
      "version": "0.0.1rc6",
      "requirements": [
        "my-pv==0.0.8"
      ]
    },
    "adb_sensor": {
      "documentation": "https://example.com",
      "version": "1.0.0",
      "requirements": []
    },
    "blueprint_studio": {
      "documentation": "https://github.com/ha-china/blueprint-studio",
      "version": "2.5.5",
      "requirements": [
        "paramiko>=3.0.0"
      ]
    },
    "media_player_template": {
      "documentation": "https://github.com/Sennevds/media_player.template",
      "version": "1.0.2",
      "requirements": []
    },
    "fritzbox_callmonitor_raw": {
      "documentation": "https://github.com/Sanji78/fritzbox_callmonitor_raw",
      "version": "1.0.1",
      "requirements": []
    },
    "hacs": {
      "documentation": "https://hacs.xyz/docs/use/",
      "version": "2.0.5",
      "requirements": [
        "aiogithubapi>=22.10.1"
      ]
    },
    "tuya_ev_charger": {
      "documentation": "https://github.com/lachand/EV_charger",
      "version": "2.22.0",
      "requirements": [
        "tinytuya>=1.20.0"
      ]
    },
    "tomtut_pool_dosing_vigipool": {
      "documentation": "https://github.com/TomTuTHub/tomtut-pool-dosing-vigipool",
      "version": "2.4.6",
      "requirements": [
        "paho-mqtt>=1.6.1"
      ]
    },
    "fritzbox_anrufe": {
      "documentation": "https://github.com/Meine-smarte-Welt/fritzbox_anrufe",
      "version": "1.0.5",
      "requirements": [
        "fritzconnection[qr]==1.15.1"
      ]
    },
    "config_editor": {
      "documentation": "https://github.com/junkfix/config-editor-card",
      "version": "5.0.0",
      "requirements": []
    },
    "landroid_cloud": {
      "documentation": "https://github.com/MTrab/landroid_cloud",
      "version": "7.1.3",
      "requirements": [
        "pyworxcloud==6.4.2"
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    },
    "xtend_tuya": {
      "documentation": "https://github.com/azerty9971/xtend_tuya",
      "version": "4.5.1",
      "requirements": []
    },
    "alphaess_modbus": {
      "documentation": "https://github.com/senalse/ha-alphaess-modbus",
      "version": "1.14.0",
      "requirements": [
        "pymodbus>=3.7.4"
      ]
    }
  },
  "integration_manifest": {
    "domain": "tuya_ev_charger",
    "name": "Tuya EV Charger Local",
    "codeowners": [
      "lachand"
    ],
    "config_flow": true,
    "dhcp": [
      {
        "registered_devices": true
      }
    ],
    "documentation": "https://github.com/lachand/EV_charger",
    "integration_type": "device",
    "iot_class": "local_polling",
    "issue_tracker": "https://github.com/lachand/EV_charger/issues",
    "loggers": [
      "tinytuya"
    ],
    "quality_scale": "silver",
    "requirements": [
      "tinytuya>=1.20.0"
    ],
    "version": "2.22.0",
    "is_built_in": false,
    "overwrites_built_in": false
  },
  "setup_times": {
    "null": {
      "setup": 4.943390376865864e-05
    },
    "01KZV04CKNZQ6J2HJZ06JBQ41W": {
      "config_entry_setup": 2.007154816063121
    }
  },
  "data": {
    "entry": {
      "entry_id": "01M005DM8RVH1RY8EAHRGJP0FT",
      "title": "Tuya EV Charger",
      "data": {
        "host": "**REDACTED**",
        "device_id": "**REDACTED**",
        "local_key": "**REDACTED**",
        "protocol_version": "3.4",
        "charger_profile": "depow_v2"
      },
      "options": {
        "surplus_battery_soc_high_threshold_pct": 95,
        "surplus_battery_soc_low_threshold_pct": 60,
        "surplus_start_threshold_w": 1600,
        "surplus_stop_threshold_w": 1200,
        "surplus_max_battery_discharge_for_ev_w": 10000,
        "surplus_battery_soc_threshold_pct": 95,
        "surplus_mode_enabled": true,
        "scan_interval": 30,
        "charger_profile": "depow_v2",
        "charger_profile_json": "",
        "continuous_current": true,
        "max_charge_current_a": 0,
        "min_charge_current_a": 0,
        "max_house_power_w": 0,
        "max_inverter_power_w": 0,
        "external_charge_allowed_sensor_inverted": false,
        "total_load_sensor_entity_id": "sensor.alphaess_inverter_current_house_load",
        "vehicles": "",
        "off_peak_windows": "",
        "departure_time": "",
        "departure_energy_kwh": 0,
        "off_peak_price": 0.0,
        "peak_price": 0.0,
        "surplus_sensor_inverted": false,
        "surplus_curtailment_sensor_inverted": false,
        "surplus_sensor_entity_id": "sensor.alphaess_inverter_grid_power",
        "surplus_battery_net_discharge_sensor_inverted": false,
        "surplus_allow_battery_discharge_for_ev": true,
        "surplus_battery_soc_sensor_entity_id": "sensor.alphaess_inverter_battery_state_of_charge",
        "surplus_battery_net_discharge_sensor_entity_id": "sensor.alphaess_inverter_battery_power",
        "surplus_curtailment_sensor_entity_id": "",
        "surplus_forecast_sensor_entity_id": "",
        "external_charge_allowed_sensor_entity_id": ""
      }
    },
    "integration": {
      "version": "2.22.0"
    },
    "client": {
      "dp_profile": "depow_v2"
    },
    "connection": {
      "polls_ok": 340,
      "polls_failed": 0,
      "success_rate_pct": 100.0,
      "consecutive_failures": 0,
      "last_success_at": "2026-08-14T18:41:02+02:00",
      "last_failure_at": null,
      "last_fault": null,
      "host": "**REDACTED**",
      "relocations": 0,
      "key_refreshes": 0,
      "last_discovery": null,
      "poll_interval_s": 10,
      "connection_released": false
    },
    "coordinator_data": {
      "voltage_l1": 212.0,
      "current_l1": 15.4,
      "power_l1": 0.0,
      "phases": {
        "L1": {
          "voltage": 212.0,
          "current": 15.4,
          "power": 0.0,
          "raw_power": 3.2
        },
        "L2": {
          "voltage": 212.0,
          "current": 15.3,
          "power": 0.0,
          "raw_power": 3.2
        },
        "L3": {
          "voltage": 212.0,
          "current": 15.3,
          "power": 0.0,
          "raw_power": 3.2
        }
      },
      "total_power": 0.0,
      "session_energy_kwh": 1.9,
      "session_duration_s": 801,
      "last_session_energy_kwh": null,
      "last_session_duration_s": null,
      "temperature": 28.0,
      "work_state": null,
      "work_state_debug": "UNKNOWN",
      "status": null,
      "plug_in_action": null,
      "do_charge": null,
      "current_target": null,
      "max_current_cfg": null,
      "nfc_enabled": null,
      "downcounter": null,
      "selftest": null,
      "alarm": null,
      "adjust_current_options": null,
      "product_variant": null,
      "charger_info": {},
      "schedule_enabled": false,
      "schedule_start": null,
      "schedule_end": null
    },
    "raw_dps": {
      "101": 300,
      "102": "{\"L1\":[2120,154,32],\"L2\":[2120,153,32],\"L3\":[2120,153,32],\"t\":280,\"p\":97,\"d\":8090,\"e\":19}",
      "106": "{\"r\":\"Type B, AC 30mA + DC 6mA\",\"fv\":\"1.0.0\",\"cp\":\"6.2\",\"t\":\"1470\",\"e\":\"15935\"}",
      "107": "[6, 8, 10, 13, 16]",
      "109": "WORKING",
      "150": 16,
      "151": "{\"m\":0,\"dt\":0,\"ss\":\"09:00\",\"se\":\"20:00\"}",
      "152": 16,
      "155": false,
      "156": false
    },
    "configured_surplus_sensors": {
      "surplus_sensor_entity_id": {
        "entity_id": "sensor.alphaess_inverter_grid_power",
        "state": "3851.0",
        "unit_of_measurement": "W",
        "device_class": "power",
        "state_class": "measurement"
      },
      "surplus_battery_soc_sensor_entity_id": {
        "entity_id": "sensor.alphaess_inverter_battery_state_of_charge",
        "state": "91.2",
        "unit_of_measurement": "%",
        "device_class": "battery",
        "state_class": "measurement"
      },
      "surplus_battery_net_discharge_sensor_entity_id": {
        "entity_id": "sensor.alphaess_inverter_battery_power",
        "state": "7472.0",
        "unit_of_measurement": "W",
        "device_class": "power",
        "state_class": "measurement"
      }
    }
  },
  "issues": []
}

Output of python -m tinytuya scan

TinyTuya (Tuya device scanner) [1.20.0]

Scanning on UDP ports 6666 and 6667 and 7000 for devices for 18 seconds...

New Broadcast from App at 192.168.10.60 - {'from': 'app', 'ip': '192.168.10.60'}
Unknown v3.5 Device   Product ID = yz9wjr7rtdhj7x5z  [Valid Broadcast]:
    Address = 192.168.10.80   Device ID = bfa840493c679a9917xhqi (len:22)  Local Key =   Version = 3.5  Type = default, MAC =
    No Stats for 192.168.10.80: DEVICE KEY required to poll for status
Unknown v3.4 Device   Product ID = witok7vhhjohtr02  [Valid Broadcast]:
    Address = 192.168.10.33   Device ID = bff6f8387a657fa5c5te0o (len:22)  Local Key =   Version = 3.4  Type = default, MAC =
    No Stats for 192.168.10.33: DEVICE KEY required to poll for status
Unknown v3.5 Device   Product ID = yz9wjr7rtdhj7x5z  [Valid Broadcast]:
    Address = 192.168.10.81   Device ID = bfa190e1b22058e0606w5r (len:22)  Local Key =   Version = 3.5  Type = default, MAC =
    No Stats for 192.168.10.81: DEVICE KEY required to poll for status
Scan completed in 18.0752 seconds

Scan Complete!  Found 3 devices.
Broadcasted: 3
Versions: 3.4: 1, 3.5: 2
Unknown Devices: 3

DP dump while charging

Profile assistant report:

{
  "entry_id": "01M005DM8RVH1RY8EAHRGJP0FT",
  "entry_title": "Tuya EV Charger",
  "suggested_profile": "generic_v1",
  "applied_profile": null,
  "report": {
    "suggested_profile": "generic_v1",
    "detected_dp_ids": [
      "101",
      "102",
      "106",
      "107",
      "109",
      "150",
      "151",
      "152",
      "155",
      "156"
    ],
    "candidates": {
      "metrics": [
        "102"
      ],
      "charger_info": [],
      "do_charge": [
        "101",
        "150",
        "152",
        "155",
        "156"
      ],
      "current_target": [
        "150",
        "152"
      ],
      "work_state_debug": [
        "109"
      ]
    },
    "sample_values": {
      "101": 300,
      "102": "{\"L1\":[2130,154,32],\"L2\":[2130,153,32],\"L3\":[2130,153,32],\"t\":280,\"p\":98,\"d\":11380,\"e\":28}",
      "106": "{\"r\":\"Type B, AC 30mA + DC 6mA\",\"fv\":\"1.0.0\",\"cp\":\"6.2\",\"t\":\"1470\",\"e\":\"15935\"}",
      "107": "[6, 8, 10, 13, 16]",
      "109": "WORKING",
      "150": 16,
      "151": "{\"m\":0,\"dt\":0,\"ss\":\"09:00\",\"se\":\"20:00\"}",
      "152": 16,
      "155": false,
      "156": false
    }
  }
}

Before submitting

• Home Assistant is on the same subnet as the charger (UDP broadcasts do not cross VLANs)
• I redacted the key line from the tinytuya scan output

[grinder1337]

Dieser Fehler stammt von einer benutzerdefinierten Integration

Logger: custom_components.tuya_ev_charger.tuya_ev_charger
Quelle: custom_components/tuya_ev_charger/tuya_ev_charger.py:539
Integration: Tuya EV Charger Local (Dokumentation, Probleme)
Erstmals aufgetreten: 20:48:23 (2 Vorkommnisse)
Zuletzt protokolliert: 20:48:40

Charger returned an error payload: Check device key or version

unfortunately i restarted ha, this explains why there's the error only 2 times....

[lachand]

Thanks for the report, and sorry for the churn of deleting/recreating the integration to fix it.

"Check device key or version" is actually tinytuya's own message for a failed session-key negotiation (ERR_KEY_OR_VER) — this integration just relays it. For a charger on protocol 3.4 like yours, that error means the per-connection handshake failed, not necessarily that the stored local_key string itself is wrong. Every poll opens a fresh socket and renegotiates from your local_key — nothing is cached client-side across polls that could go stale after 24h — so if your key genuinely hadn't changed, in principle the very next poll should renegotiate fine on its own.

That it didn't, and that only delete+recreate fixed it (not re-entering the same key via Reconfigure), points at something more persistent than a one-off blip — most likely on the charger's own Wi-Fi module side. There's nothing in this codebase tied to a midnight/24h cycle, so if the timing is real, my best guess is some daily housekeeping on the module itself (e.g. its own cloud check-in) that leaves its local session handshake stuck for a while.

One thing I can already fix: the "invalid credentials" wording you'd have seen while retrying Reconfigure with the same key was misleading — the check behind it can't currently tell "session negotiation glitched" apart from "key actually rotated," so it always points at the key. I've reworded that message (shipping in 2.23.1) to say a transient hiccup can look identical, and to suggest waiting a minute before assuming re-pairing is needed. I haven't touched the underlying retry/classification logic itself — that needs confirming where it actually gets stuck, and I can't test connection-recovery changes against real hardware right now.

If it happens again, three things would help before you delete/recreate:

1. The charger's firmware version (fv, in the diagnostics download or a profile_assistant dump).
2. Whether it's every single night at midnight, or intermittent.
3. A run of tools/tuya_autodetect_test.py --local-key <key> while it's stuck (before deleting) — if the control port still answers a real status read, that rules out a full network-level drop.