Bluetooth Module TX HELP

Projects Networking, Protocols, and Devices
1

Hi guys,

I bought bluetooth module, you can find the datasheet here:
http://www.e-gizmo.com/KIT/images/EGBT-04/EGBT-045MS-046S%20Bluetooth%20Module%20Manual%20rev%201r0.pdf

I can successfully set speed and name with AT commands, but I never receive any RESPONSE, like "OK" as supposed.
I've double check the bluetooth TX wire, it seems its everything ok.

code:
void setup() {
pinMode(13, OUTPUT);
Serial.begin(9600);
Serial.println("AT+NAMEBrownie");
digitalWrite(13, HIGH);
}

Thanks in advance

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2

I've already disconnect led pin, and add a 1k resistor between tx bt pin and rx arduino pin, but its the same, no response from bt module.

any ideas?

thanks

3

Now I connect bt 3 GND pins to ground, instead just one..

still not working..

4

Ok, now I discover something..

When I send 2 "AT" commands the BT module don't assume the "enter" between the two commands, see the image attached.
the 2nd image is a capture from my phone, look what I found.. name+ second command I sent

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5

Ok, with a delay(2000); between the commands it does'nt happen.

code:
void setup() {

Serial.begin(9600);
delay(3000);
Serial.println("AT+NAMEteste1");
delay(30000);
Serial.println("AT+NAMEtest2");
delay(30000);
Serial.println("AT+NAMEtest3");
delay(30000);
Serial.println("AT+NAMEtest4");
delay(30000);
Serial.println("AT+NAMEtest5");
}

The name of module change successfully every 30seconds, but without response

any ideas?

6

you might need to hook the BT to the other soft serial if your using a terminal program to read from the arduino. also you dont seem to be reading the tx line into the arduino sketch code.

7

Well, there is a few things that I don't realise.

With USB connected tx and rx doesn't work, so if you want to be able to use it, you cant power arduino with usb cable.

I already establish connection between pc and arduino via bluetooth