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IoT Devices

This page mostly serves as a refernece to myself as to what devices are where in the house, which ones to buy again, and which ones fail frequently. My smart devices are all on my IoT VLAN, meaning that their internet connections are all separate to the main LAN traffic and I can hopefully eventually wall them off from the internet, using things such as Local Tuya.

Devices follow a sequential numbering order, with a label on each plug. When a device is retired, the number can be reused, and the DHCP DNS assignment is also updated.

Although DNS should work, all devices are assigned a static lease. Lights start at .21, plugs start at .41.

Hostname MAC Address IP Address Product Type Firmware Assignment Notes
light1 DC:4F:22:12:69:DC 192.168.30.21 Lombex LX-BW09 RGBW Smart Bulb E27 Tuya Bedroom overhead
light2 DC:4F:22:12:67:F4 192.168.30.22 Lombex LX-BW09 RGBW Smart Bulb E27 Tuya Desk light
plug1 C8:47:8C:40:56:C3 192.168.30.41 eLinkSmart BSD29 10A Socket + PM Tuya Main desk feed Used to calculate surplus energy usage.
plug2 68:57:2D:97:12:CF 192.168.30.42 TECKIN SP27 10A Socket + PM Tuya Unassigned
plug3 C8:47:8C:40:35:6E 192.168.30.43 eLinkSmart BSD29 10A Socket Tuya Cloudcutter String lights
plug4 C8:47:8C:30:4D:C8 192.168.30.44 eLinkSmart BSD29 10A Socket Tuya Cloudcutter Kettle Used to see how much energy the kettle actually uses.
plug5 D8:BC:38:8C:A2:10 192.168.30.45 LocalBytes 2023-07-ESP 10A Socket ESPHome Electric blanket Dodgy relay.
plug6 C8:47:8C:30:35:0F 192.168.30.46 eLinkSmart BSD29 10A Socket Tuya Unassigned
plug7 D8:BC:38:8C:A1:4B 192.168.30.47 LocalBytes 2023-07-ESP 10A Socket ESPHome TV corner
plug8 D8:BC:38:8C:A1:44 192.168.30.48 LocalBytes 2023-07-ESP 10A Socket ESPHome Bed corner

Device Specific Notes

eLinkSmart BSD29

Sometimes unreliable connecting to Wi-Fi. Tried to flash with Pi Pico programmer with open source firmware, but don't think the Pi contains the right pins to drive it. Tuya cloudcutter worked fine. Can't quite remember which firmware to set, but go by the version in Tuya app, then Tuya generic.

DP Mappings

  • 1: Switch
  • 18: Current, A, 0.001 scaling factor
  • 19: Power, W, 0.1 scaling factor
  • 20: Voltage, V, 0.1 scaling factor
  • 39: LED Status Enum (Supposedly, not working)
  • 30: Child Lock Status (Supposedly, not working)

TECKIN SP27

One of these has gone to the graveyard. It was broken and wouldn't stop switching on and off. Other one still works okay. Doesn't seem to be in the list of reflashable devices

Useful Info

Make sure AP is not obstructed or you'll get horrible performance and loads of failed pings. Must be lack of MIMO as phone can do 2.4G fine.

Cloud Cutting

Can take apart devices but Pico won't flash them using the attached method for the eLinkSmart plugs they were susceptible to the Tuya attack, so slowly migrating.

  • https://github.com/tuya-cloudcutter/tuya-cloudcutter
  • Edit /etc/NetworkManager/NetworkManager.conf and set [ifupdown] managed= to true
  • cd ~/tuya-cloudcutter
  • sudo ./tuya-cloudcutter.sh -s <ssid> <pass>
  • It will kick you off an SSH session, so plug into monitor and attach keyboard, might be a way round this but I've not found
  • Note the new device ID and key in the spreadsheet
  • https://openbekeniot.github.io/webapp/devicesList.html

Need to work out the Alexa integration.

Emulated Hue

  • Setup with all plugs, only add lights to the room groups, all other devices manually switch on and off
  • All Alexas need to be on the same VLAN atm, looking at a possible way to allow inter-VLAN communications so can put Alexa back on IoT VLAN
  • Other approach might include the idea of multiple IPs on the running-lion server

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