LPCXpresso Projects/Experiments

[lpcware]

Content originally posted in LPCWare by andersrosvall on Tue Oct 26 05:00:06 MST 2010
Hi All,
I just want to give a link to a section on our homepage where we publish small projects/experiments based on LPCXpresso: http://www.embeddedartists.com/projects/lpcxpresso.php

Our goal is to publish something new every month. Hopefully it can trigger some great new project ideas.

Kind Regards,
Anders Rosvall
Embedded Artists AB

[lpcware]

Content originally posted in LPCWare by Ex-Zero on Thu Oct 28 12:21:09 MST 2010
Diy :)

[lpcware]

Content originally posted in LPCWare by dbrunell on Thu Oct 28 11:39:45 MST 2010
I recently started a blog where I'll be developing scientific instruments using the LPCXpresso board: http://quantalume.com.  Now, if we could just find a source for the 1768 boards. :(  I'm going to hedge my bets and make everything compatible with the mbed as well.

[lpcware]

Content originally posted in LPCWare by Luis Digital on Wed Oct 27 08:03:26 MST 2010
O.K. But that's not accurate. I have several GPSs with Bluetooth, and the range varies, when they should be very similar. [COLOR=#000000]Same goes with Bluetooth-USB adapters.[/COLOR]

[lpcware]

Content originally posted in LPCWare by Ex-Zero on Wed Oct 27 07:45:33 MST 2010
:confused: Ebay module Datasheet:

http://mdfly.com/Download/Wireless/BT0417C_datasheet.pdf

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Quote:
Output Power Class : Class 2

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Wiki:

http://en.wikipedia.org/wiki/Bluetooth

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Quote:
Class2 = max. 4 dBm / max. 2.5 mW / Range ~10 meters

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[lpcware]

Content originally posted in LPCWare by Luis Digital on Wed Oct 27 07:29:28 MST 2010
Zero,

Its Bluetooth module has 18dB, but that's not the norm. And the module is on eBay does not specify the power output.

Thank you.

[lpcware]

Content originally posted in LPCWare by Ex-Zero on Wed Oct 27 06:59:05 MST 2010
Sorry, wasn't aware that you are looking for someone who can read & compare 2 datasheets :p.

Back to work:

18dBm (=63mW) Output Power is much more than 0 dBm (=1mW).

Don't know what you are trying to do, but after blaming Bluetooth for 'signal is lost much earlier' it could be a good idea to look for a module with high RF Output (and low RX sensitivity):) and use them for LPC & PC (which often use built-in Class2 BTM).

[lpcware]

Content originally posted in LPCWare by Luis Digital on Wed Oct 27 06:39:19 MST 2010

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Quote: Zero
BTM222:
18dBm (Class1) RF Output
3.3V Supply Voltage
Interface: UART

No setup required :eek:: just connect VCC, GND, RxD, TxD and use UART with 19200 bps (higher baud rates can set via AT command) to use Bluetooth Serial Port.

http://www.rayson.com/product/wireless/BTM-22x.htm

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On eBay there is a similar module for $10, but there is also a module MRF24J40 with similar characteristics.

For that reason asked about the advantages and disadvantages of each.

[lpcware]

Content originally posted in LPCWare by Ex-Zero on Tue Oct 26 21:19:06 MST 2010
BTM222:
18dBm (Class1) RF Output
3.3V Supply Voltage
Interface: UART

No setup required :eek:: just connect VCC, GND, RxD, TxD and use UART with 19200 bps (higher baud rates can set via AT command) to use Bluetooth Serial Port.

http://www.rayson.com/product/wireless/BTM-22x.htm

[lpcware]

Content originally posted in LPCWare by Luis Digital on Tue Oct 26 14:05:41 MST 2010
Very good! I will bring my bit also in the not too distant future.

I  have a bad experience with Bluetooth, supposedly has a range of 10  meters, but if there is any obstacle, the signal is lost much earlier.

Something positive with Bluetooth is that a microcontroller can communicate with a PC.

What are the advantages/disadvantages between Bluetooth, and the module MRF24J40?

Anyone with experience in the subject can give his opinion.

Thanks.