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1  Using Arduino / Networking, Protocols, and Devices / Bluetooth HC-05 YJ-MCU enter AT-MODE on: July 18, 2014, 06:58:13 pm
Hello.

Does anyone has information of how to enter AT-MODE with this Bluetooth module? Most of the content I find uses the HC-05 chip by itself.

Thanks
2  Using Arduino / Networking, Protocols, and Devices / Re: Bluetooth JY-MCU HC-06 do not stays connected to computer on: June 06, 2014, 02:33:29 pm
I still have this problem. I can't connect the bluetooth to the laptop, android or windows phone. The led is always flashing. Could it be stuck with an old connection? can I reset it?
3  Using Arduino / Networking, Protocols, and Devices / Re: How to get the JY-MCU bt board to work on: June 03, 2014, 02:45:56 pm
According to this http://www.oemblue.com/download/Bluetooth%20modules%20AT%20Command%20Manual.pdf

If I send the "AT" command to the bluetooth I will receive an OK as response. I have this code on a arduino mega:

void setup(){
  Serial.begin(9600);
  Serial1.begin(38400);
  Serial1.println("AT");
}

void loop(){
 
  if(Serial1.available()){
    Serial.write(Serial1.read());
    Serial1.println("AT");
  }
}

But I'm not receiving anything. I have TXD on pin 19 and RXD on pin 18. What I'm doing wrong?
4  Using Arduino / Networking, Protocols, and Devices / Re: Bluetooth JY-MCU HC-06 do not stays connected to computer on: May 28, 2014, 09:31:38 pm
I think the problem is with the sensor because I tried with the same phone I tried the first time and it doesn't stay connected either
5  Using Arduino / Networking, Protocols, and Devices / Bluetooth JY-MCU HC-06 doesn't stay connected to computer on: May 28, 2014, 06:03:39 pm
I have the bluetooth sensor JY-MCU. When I first tried it I connected to the arduino and paired with an Android terminal. The sensor has a blinking led and when I connected it stopped blinking.

One week later I'm trying to connect it again but it is not working. This time from a laptop. When I connect it to the sensor the led do not stop blinking and after a minute the laptop says it is not connected to the sensor.

Does anyone have had this problem? What could be the problem?
Thanks
6  Using Arduino / General Electronics / Re: Ultrasonic distance sensor not working when using batteries as power suply on: May 27, 2014, 01:07:19 pm
I was using the mega adk. I switched to mega 2560 and it works perfectly.
7  Using Arduino / General Electronics / Re: Ultrasonic distance sensor not working when using batteries as power suply on: May 19, 2014, 02:57:40 pm
The ultrasonic sensor needs 5V to work and the arduino mega board from 6V to 12V. Do I have to sum both voltages (5V + 6V) to determine how much I need? If so I need minimum 11V.

I'm not an electronics person
8  Using Arduino / General Electronics / Re: Ultrasonic distance sensor not working when using batteries as power suply on: May 19, 2014, 02:52:27 pm
Quote
but when I connect it to a 6 AA batteries adapter
Did you mean a 6V (4xAA) or 9V (6xAA)?

How is this source connected?

9V (6xAA)

I have this adapter http://cdn.shopify.com/s/files/1/0192/8922/products/ADEX-03-AA_1024x1024.jpeg?v=1370607211
9  Using Arduino / General Electronics / Ultrasonic distance sensor not working when using batteries as power suply on: May 19, 2014, 02:08:36 pm
Hello, I have a project where I get the distance from an ultrasonic sensor and save it in a log in a file using a Wifi shiled. When the arduino is connected to the computer everything works fine but when I connect it to a 6 AA batteries adapter I only get ceros in the log. The batteries are new.

I noticed that connected to the pc the TX led is very bright but connected to the batteries I can barely see it.

Do I need more power? What are the options?

Thanks
10  Using Arduino / Project Guidance / Which bluetooth sensor will allow me to connect to a device? on: May 17, 2014, 02:56:55 pm
I need to connect the arduino to a OBD scanner using bluetooth. I have the JY-MCU but it seems that I can connect from it to the OBD.

What I need is a bluetooth that will allow me to set the bluetooth name to which I have to connect and send commands that will return data.

Thanks for your help
11  Using Arduino / Project Guidance / Example of a project using Arduino Mega + WiFi Shield + GPS Shield on: May 17, 2014, 02:05:55 pm
Hello, I need guidance conecting a wifi shield and a gps shield to an Arduino mega. I need to get gps data, store it in a microsd and then send it to a server using wifi. Is there previous work where I can check which shields are compatible? I already have a sainsmart Arduino and an Arduino wifi Shield. I also have a gps shield Itead but can't get it to work so I'll get the sparkfun gps shield.

Any help is welcome.

Thanks.
12  Using Arduino / Programming Questions / Re: Arduino GPS Shield by iteadstudio.com on: March 16, 2014, 11:44:00 am
I'm new with Arduino. How do you check or set the RX and TX jumpers? I have an Arduino Mega. I can see a row of jumpers RX - TX (0 0,3 3,2 2,1 1) but the shield gets only to the TX0(1) and RX0(1) and I read here that you must set it to 3,4. How does it works?

I'm using the replay  #130 and a I get this message: "No GPS data received: check wiring". At some time I changed the voltage from 5 to 3.3. Now I have it at 5. Did I kill my GPS?  smiley-cry

Thanks for your help
13  Using Arduino / Installation & Troubleshooting / Error connecting an ITead Arduino GPS shield to an Arduino Mega on: March 15, 2014, 11:56:01 am
Hello

I have an Arduino Mega 2560 and the ITead GPS Shield http://imall.iteadstudio.com/im120417017.html (Am I breaking some rules here?) and when I load the blink sketch

avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer


I tried the same Mega board with a Arduino WiFi shield and seems to work perfectly as the Mega itself.
What could be wrong?
Thanks!
14  International / Hardware / Ayuda en la seleccion de modulos para un proyecto de GPS+GSM on: April 03, 2013, 11:30:43 pm
Hola, soy nuevo con Arduino y estoy en un proyecto de rastreo de vehiculos con arduino. He seleccionado los siguientes articulos que creo que son los que necesitare.

-Arduino Uno
-Cellular shield con modulo SM5100B http://www.robodacta.mx/index.php?dispatch=products.view&product_id=29865
-Antena celular quad-band, SMAhttp://www.robodacta.mx/index.php?dispatch=products.view&product_id=30105
-GPS shield con el modulo  SiRF star III http://cosasdeingenieria.com/esp/index/item/459/43/shield-gps-compatible-con-arduino
-Antena GPS con conector SMA 3Vhttp://cosasdeingenieria.com/esp/index/item/238/antena-para-gps-montaje-magnetico-con-conector-sma-de-3v
-8-pin & 6-pin headers (x2)

Me faltara adquirir algo? habra algun problema de compatibilidad?. Sobre la antena celular, me hace falta un cable extra para conectarlo al shield celular?

Gracias por su ayuda
15  Using Arduino / Project Guidance / Re: [Arduino + GPS + GSM] Am I getting the appropiate modules? on: April 03, 2013, 11:12:51 am
thank you, thats a lot I have to learn and this will help
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