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Topic: BT shield problems.. (Read 812 times) previous topic - next topic


I'm having problems with my BTshield.. I can't seem to make it work.. I can't make the two LEDs of my BT shield to blink alternatively to know if it's inquiring or pairing..

When using the serial monitor or HT comm, i can't get any response.. like OK, or +BTSTA:0..

What should I do?..

What code should I use?

How can i set the it to AT command mode so i can change its configuration?

my BTshield-EGBT-04S(slave only): http://www.e-gizmo.com/KIT/BLUETOOTH%20SHIELD.html

Thanks in advance guys..


I can't make the two LEDs of my BT shield to blink alternatively to know if it's inquiring or pairing..

Why do you expect to be able to control the LEDs? I suspect that, from your point of view, they are read-only.

Personally, the level of support from e-gizmo would be enough to keep me from ever buying anything from them. Did you ask them how to use it? Do they even know?
The art of getting good answers lies in asking good questions.

Guy Cothal

it looks like a serial connection on Serial 0/1 pins...which mead you have to either power off the unit, unplug it from the arduino or even run it on Serial1 Serial2 or Serial3 if you have a Mega style board


Nov 25, 2012, 10:35 pm Last Edit: Nov 25, 2012, 11:13 pm by WinstonP Reason: 1
damn, and all this time I thought the Seeed Studio BT shield was bad. this thing looks terrible given the lack of info. but I did find this:
http://pial.net/post/Using-the-HC-05-Bluetooth-RS232-Serial-module-for-cheap-wireless-communication-with-your-uController.aspx Give it a shot.
also, fwiw, from the picture on the scant 5 page manual the BT module itself looks 98% exactly like the Seeed Studio shield.
it looks like this thing can be connected using SPI also. I may have to make some changes to my board.

(btw, if you're wondering where I got the HC-05 number from; check figure 3. the BT module is labeled as "Mod1     HC-05/06")

just found this page also:


The LEDs are just indicators, to tell me the BT shield is inquiring, pairing and connected..

I'm trying to pair and connect my BT shield with my android phone.. so i need to configure the BT shield's baud rate.. The problem is I can't get the serial terminal or any terminal emulator to respond to any AT commands.. thus, i can't change the Baud Rate..

What should I do?

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