#twatch: backlight control

Posted on Saturday, September 19th, 2009 in #twatch by Ian


The #twatch backlight is controlled through a TCP server on port 1337. We use Herculese as our TCP client.

Connect to the #twatch TCP server at the IP address shown on the LCD screen. Send the command 0xFE 0x42 0x00 to turn on the backlight. Send the command 0xFE 0x46 to turn it off. Programs like LCD Smartie and LCDProc send these commands automatically when they start and exit.

This entry was posted on Saturday, September 19th, 2009 at 7:31 am and is filed under #twatch. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

3 Responses to “#twatch: backlight control”

  1. Nishant says:


    I just got a twatch unit from Seed studio. The

    ip on the unit is; subnet; gate and DNS are is there any way to change the IP to a 192.168.1.x series as that is what my home network is on. I know most of the documentation on your site says this is what it should be but the unit i just recieved has tehse settings as the default.

    I tried changing the ip of my laptop to connect using Hercules but it only connects on port 80; if i send the command when connected like this it refuses the connection.

    Please help.


  2. Ian says:

    Hi Nishant – Does your home network have a DHCP server? The #twatch requires a DHCP server to acquire an IP address.

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