Weak binding is the least secure among the three binding modes. Suppose a device is already bound to user A, and now user B wants to add the device to their own account. In weak binding mode, user B can directly network and add the device to their account without the consent of user A, thus no unbinding operation is required. For more details, please refer to:https://developer.tuya.com/en/docs/iot/dev_bind_mode?id=Kb6cozyy0fxnv