backlight

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twatch-unbox2

The white-on-blue screen that shipped with the #twatch really requires the backlight to be visible. Here’s an updated firmware that has the backlight on at power-up. The new firmware is loaded over the network using tools already available in most operating systems, Windows instructions here.

We apologize for the lack of refinement. We prototyped with a cheap grey-on-green screen that didn’t normally require the backlight. The firmware posted to the Google Code project page went into the Seeed #twatches unmodified to ensure that yours matched the original. Everyone would probably have preferred that the #twatch ship with the backlight enabled by default.

In the next update we’ll tweak the refresh rate and scrolling speed. Do you have any other specific requests for the standard #twatch firmware?

Image by andrewholmes.

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twatch-sideiii

It looks like the #twatch is starting to arrive worldwide. WA5ZNU received a #twatch and wrote a Python script to control the backlight. You can use this thread to discuss your #twatch unboxing experience.

There’s still a few #twatches at Seeed Studio for immediate delivery, $45 including LCD and worldwide shipping.

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#twatch: backlight control

backlight-control

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.

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