Can PowerCable MQTT restart a device remotely?

Yes, with the “Short OFF” command the power to the device can be switched off for e.g. 5 seconds. After that, the PowerCable restores the power even without a WiFi connection.

A typical application involves a remote restart function where the user needs to send, over the Web or via MQTT, a command that momentarily switches the output off and then switches it back on. This is typically used to restart a LTE / WLAN modem; PowerCable controls the power to the modem.