New project: LCD module drivable via Bluetooth

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

Hello,

for a new project I'm looking for a LCD module that can be driven via BLuetooth, via a PC. So actually serially.

Normally a LCD module is only drivable via a microcontroller via it's data and control lines. I'm looking for a module that has it all, a soort of screen/LCD that you can control via BT.

If this does not exist, this is going to be my next project; a BT module, probably some PIC µC and an LCD module.

Anyone has got some ideas?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

See this thread on the CrystalFontz LCD forum:
http://www.crystalfontz.com/forum/showthread.php?t=3305

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

So I can assume that module does not exist as an end product. Also can't find any information on the internet..

libor · Joined: 14 Dec 2004 Posts: 288 Location: Hungary

I think this solution exists in two separate products that one could combine:

- BT modules acting transparently as a serial RS232 wire.
- an LCD module with an (add-on) RS-232 interface.

anyway, it will be much cheaper and edifying if you would build your own.

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

Does anyone have good experience with data serial bluetooth modules ?

kevcon · Joined: 21 Feb 2007 Posts: 142 Location: Michigan, USA

We did a project that worked out quite well with National's LMX9820A part.

http://cache.national.com/pf/LM/LMX9820A.html

We are currently working on a redesign with the much cheaper and smaller LMX9830 part along with a PIC18F65J10

http://cache.national.com/pf/LM/LMX9830.html

Kevin

libor · Joined: 14 Dec 2004 Posts: 288 Location: Hungary

I have tried these BT v. 2.0 modules: Link: Bluegiga , the WT12 model. they work with simple alphabetic ASCII commands, and also have a data transparent operating mode.

NB: these modules are quite small in size, fine SMD soldering (and some fine prototype PCB manufacturing) is required, so the hardware part is not for a beginner hobbyist. (i suggest to look for an evaluation board, or a more ready-assembled end-product.)

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

Thanks for your input, I'll sure look at your implementations. I took a quick peak at the first and that seemed to be a BGA chip?

Atm students here are implementing this one: http://www.ezurio.com/products/bism/

I don't know if there are any cheaper solutions as this? This one costs 50€ per piece. It also has audio which is not needed for our application. Anyone has got experience with these modules?