Control Etekcity Voltson smart plugs via your local mqtt server rather than Etekcity's cloud. Keeps all data local.

• I installed in a python virtualenv using Python 3.6.5
• Uses paho.mqtt
• Uses python-websocket-server
• You need to redirect server2.vesync.com to the computer running voltlet. With dnsmasq you add a config line like this "list address '/server2.vesync.com/192.168.1.10'". Replace 192.168.1.10 with your server IP address
• Restart your plugs so that they connect to the local server.

• Send "true" to turn on the plug to /voltson/{plug-uuid}
• Send "false" to turn off the plug to /voltson/{plug-uuid}
• Plugs send "true" or "false" to /voltson/{plug-uuid}/state once they've actually changed state. Messages are retained.
• Plugs send "online" or "offline" to /voltson/{plug-uuid}/availability depending on whether they are connected. Messages are not retained.
• Plugs send json {"instantpower": 9.098388671875, "avgpower": 9.094970703125, "instantvoltage": 121.09814453125, "avgvoltage": 120.196044921875} to /voltson/{plug-uuid}/energy Messages are not retained.

switch:
  - platform: mqtt
    command_topic: "/voltson/UUID-GOES-HERE"
    state_topic: "/voltson/UUID-GOES-HERE/state"
    availability_topic: "/voltson/UUID-GOES-HERE/available"
    retain: true
    payload_on: 'true'
    payload_off: 'false'

sensor:
  - platform: mqtt
    name: "Spare Vesync switch power"
    state_topic: "voltson/UUID-GOES-HERE/energy"
    unit_of_measurement: "W"
    value_template: '{{ value_json.instantpower|int }}'
  - platform: mqtt
    name: "Spare Vesync switch voltage"
    state_topic: "voltson/UUID-GOES-HERE/energy"
    unit_of_measurement: "V"
    value_template: '{{ value_json.instantvoltage|int }}'

• voltlet the inspiration. Wrote in python because I wanted to learn the language.
• vesync-wsproxy this project just proxies the connect to the cloud server to spy on what happens. I'd rather keep my data local.
• This project attempted to do something similar but wasn't fully implemented. That said it has great notes about the line protocol