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 0×42 0×00 to turn on the backlight. Send the command 0xFE 0×46 to turn it off. Programs like LCD Smartie and LCDProc send these commands automatically when they start and exit.
3 comments
Comments feed for this article
November 7, 2009 at 3:08 pm
Nishant
Hi!
I just got a twatch unit from Seed studio. The
ip on the unit is 169.254.1.1; subnet 255.255.0.0; gate and DNS are 169.254.1.1- 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.
Thanks
November 7, 2009 at 3:13 pm
Ian
Hi Nishant – Does your home network have a DHCP server? The #twatch requires a DHCP server to acquire an IP address.
November 16, 2009 at 5:38 pm
Ian
There’s a firmware upgrade with the backlight enabled by default:
http://dangerousprototypes.com/2009/11/13/twatch-firmware-with-backlight-enabled/