After update to 20260107.2 Shelly devices not working any more

Hi,

After I upgraded the system to Home Assistant OS Core 2026.1.3, Supervisor 2026.01.1, Operating System 17.0 and Frontend 20260107.2 all the Shelly devices are not working any more.

After deleting from HA and a factory reset, the ShellyPlusPlugS running firmware 1.7.4 (fw_id: 20260120-145254/1.7.4-gf9878b6) the connection is still not possible. A communication error is repoerted. Also a manual integration with IP and port 80 is not successful. ws://192.168.x.x:8123/api/shelly/ws fails also.

What did I miss in the configuration??? See the log attached.

Many thanks for your help, my system is not smart any more…
Christof

{
  "web_id": "251217100547-340dae1f",
  "deviceInfo": {
    "name": "PlusPlugS-Schreibtisch",
    "id": "shellyplusplugs-xxx",
    "mac": "xxx",
    "slot": 1,
    "key": "xxx",
    "fw_sbits": "04",
    "model": "SNPL-00112EU",
    "gen": 2,
    "fw_id": "20260120-145254/1.7.4-gf9878b6",
    "ver": "1.7.4",
    "app": "PlusPlugS",
    "auth_en": false,
    "auth_domain": null
  },
  "status": {
    "sys": {
      "mac": "xxx",
      "restart_required": false,
      "time": "12:18",
      "unixtime": 1769858330,
      "last_sync_ts": 1769858330,
      "uptime": 5,
      "ram_size": 265596,
      "ram_free": 121552,
      "ram_min_free": 115872,
      "fs_size": 393216,
      "fs_free": 126976,
      "cfg_rev": 9,
      "kvs_rev": 0,
      "schedule_rev": 0,
      "webhook_rev": 0,
      "btrelay_rev": 0,
      "available_updates": {},
      "reset_reason": 3,
      "utc_offset": 3600
    },
    "jobs": [],
    "timezones": [],
    "geolocation": {},
    "hooks": [],
    "ble": {},
    "cloud": {
      "connected": false
    },
    "ffs": {
      "ts": 0
    },
    "mqtt": {
      "connected": false
    },
    "plugs_ui": {},
    "switch:0": {
      "id": 0,
      "source": "init",
      "output": true,
      "apower": 0,
      "voltage": 228.2,
      "current": 0,
      "aenergy": {
        "total": 8169.201,
        "by_minute": [
          0,
          0,
          0
        ],
        "minute_ts": 1769858880
      },
      "temperature": {
        "tC": 46.2,
        "tF": 115.1
      }
    },
    "wifi": {
      "sta_ip": "192.168.x.x",
      "status": "got ip",
      "ssid": "xxx",
      "bssid": "xxx",
      "rssi": -64
    },
    "ws": {
      "connected": false
    },
    "rev": 0
  },
  "config": {
    "sys": {
      "device": {
        "name": "PlusPlugS-Schreibtisch",
        "mac": "xxx",
        "fw_id": "20260120-145254/1.7.4-gf9878b6",
        "discoverable": true,
        "eco_mode": false
      },
      "location": {
        "tz": "Europe/Vienna",
        "lat": xxx,
        "lon": xxx
      },
      "debug": {
        "level": 2,
        "file_level": null,
        "mqtt": {
          "enable": true
        },
        "websocket": {
          "enable": true
        },
        "udp": {
          "addr": "192.168.x.x:11234"
        }
      },
      "ui_data": {},
      "rpc_udp": {
        "dst_addr": null,
        "listen_port": null
      },
      "sntp": {
        "server": "time.cloudflare.com"
      },
      "cfg_rev": 9
    },
    "cloud": {
      "enable": false,
      "server": "iot.shelly.cloud:6012/jrpc"
    },
    "mqtt": {
      "enable": false,
      "server": null,
      "client_id": "shellyplusplugs-xxx",
      "user": null,
      "ssl_ca": null,
      "topic_prefix": "shellyplusplugs-xxx",
      "rpc_ntf": true,
      "status_ntf": false,
      "use_client_cert": false,
      "enable_rpc": true,
      "enable_control": true
    },
    "ws": {
      "enable": true,
      "server": "ws://192.168.x.x:8123/api/shelly/ws",
      "ssl_ca": "ca.pem"
    },
    "http": {},
    "firmware": {},
    "debug": {},
    "schedule": {},
    "webhook": {},
    "kvs": {},
    "tls": {},
    "scriptmanager": {},
    "ble": {
      "enable": true,
      "rpc": {
        "enable": true
      }
    },
    "ffs": {
      "enable": false
    },
    "plugs_ui": {
      "leds": {
        "mode": "power",
        "colors": {
          "switch:0": {
            "on": {
              "rgb": [
                0,
                100,
                0
              ],
              "brightness": 100
            },
            "off": {
              "rgb": [
                100,
                0,
                0
              ],
              "brightness": 100
            }
          },
          "power": {
            "brightness": 100
          }
        },
        "night_mode": {
          "enable": false,
          "brightness": 100,
          "active_between": []
        }
      },
      "controls": {
        "switch:0": {
          "in_mode": "momentary"
        }
      }
    },
    "switch:0": {
      "id": 0,
      "name": null,
      "initial_state": "off",
      "auto_on": false,
      "auto_on_delay": 60,
      "auto_off": false,
      "auto_off_delay": 60,
      "power_limit": 2500,
      "voltage_limit": 280,
      "current_limit": 12
    },
    "wifi": {
      "ap": {
        "ssid": "ShellyPlusPlugS-xxx",
        "is_open": true,
        "enable": false,
        "range_extender": {
          "enable": false
        }
      },
      "sta": {
        "ssid": "xxx",
        "is_open": false,
        "enable": true,
        "ipv4mode": "dhcp",
        "ip": null,
        "netmask": null,
        "gw": null,
        "nameserver": null
      },
      "sta1": {
        "ssid": null,
        "is_open": true,
        "enable": false,
        "ipv4mode": "dhcp",
        "ip": null,
        "netmask": null,
        "gw": null,
        "nameserver": null
      },
      "roam": {
        "rssi_thr": -80,
        "interval": 60
      }
    }
  },
  "schedule": {
    "jobs": [],
    "rev": 0
  },
  "hook": {
    "hooks": [],
    "rev": 0
  }
}

I thought I read something here about having to power reset or something because of a Shelly problem.
I would search for an answer here. Tips on Searching for Answers & Duplicate Topics in the Forum

Thanks for your hints!

I did not hard reset the devices, first I did a fresh re-install of the system. After a backup, which I downloaded, I installed Home Assisant via USB and the Imager program. When I was asked if I want to use a backup, I uploaded the backup and the waited some time. After approx. 1h, the system was up again, the Shellys work again.

For me this was my first re-install and I have to admit, that I thought it would be much more difficult. No it is not, its very easy - as long as you stay on the defined path.

KR,
Christof