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1  Using Arduino / Project Guidance / Re: Small board + LCD + Ethernet looking for advice on: Today at 11:50:54 am
Ethernet shields are about the same size as a Uno. An ENC28J60 board is half the size.
2  Using Arduino / Project Guidance / Re: GSM board questions on: September 26, 2014, 07:02:16 pm
too cryptic
3  Using Arduino / Project Guidance / Re: GSM board questions on: September 25, 2014, 06:46:56 pm
So it a GSM Shield is $88 and does not come with a board. You have to buy them separately right?

You might like to let some sanity revail before you come up with $88 by googling

ebay 281015256067
4  Using Arduino / Networking, Protocols, and Devices / Re: Recieving Bluetooth messages from android on: September 24, 2014, 11:06:07 am

I want the following to happen when my Android phone rings with an incoming call:
1) The android phone sends a BLE message to the Arduino BLE device that is registered on the phone.
2) If possible I want the details of the call, e.g. if the person is in the contact then their name should be sent to.

a) how do I get android to send those details to an bluetooth enabled arduino device


Items 1,2 and a) are the same problem. You need to get or write an Android app. After you have sorted that, the Arduino problem might be relatively easy.
5  Using Arduino / Project Guidance / Re: Which board to buy on: September 24, 2014, 10:53:16 am
You are likely to to want to do more than you think, and will then need a Mega. So you might as well get it now. It doesn't cost much more, is just as easy to use, and when the time does come when you need one, it is guaranteed to make life easier than trying to squeeze your programme into a Uno.
6  Topics / Home Automation and Networked Objects / Re: Weird problem with Uno R3 on: September 22, 2014, 07:00:19 pm
Maybe a dodgey USB cable?
7  Using Arduino / Networking, Protocols, and Devices / Re: Need help - Arduino Uno and HC-05 data transmission on: September 21, 2014, 12:27:32 am
I'm using a brand new 9V battery.

The problem with using a new 9v battery with an Arduino is the depressing speed with which it becomes an old one. Sending a boy on a man's job is never a good idea, and all it does is make solving your problem more complicated.

Quote
Even I use the USB cable to power the Arduino, my code still doesn't work.

This sounds like a better idea, to the point where one might conclude that you do have a problem, and it's not power. Having said that, even USB power can be inadequate when you start adding displays etc.

The problem is not likely to be serious, and I would suggest you go through basic tests. You might find the following background notes useful

http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf
http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino

You have two goals:
1. prove your bluetooth communication
2. prove the temperature readings

You do not need the first to prove the second.

Currently, one of the most important lines in your code

Serial.begin(9600);

is redundant.

You have not demonstrated a reason for using software serial, so I bet you haven't got one and you would be better off using the above line and ditching software serial. It may not be your problem, but sending it where it belongs makes sure that it isn't.


8  Using Arduino / Networking, Protocols, and Devices / Re: Need help - Arduino Uno and HC-05 data transmission on: September 20, 2014, 09:02:58 pm
Come on bro, I bought it from shop smiley-confuse

He is just trying to be charitable, and it's probably still the best advice you have seen on this thread.

Your code looks a bit messy, but I think it's likely to give a result. You don't actually say if you've got a problem but, if you do, it may be down to inadequate power.
9  Using Arduino / Networking, Protocols, and Devices / Re: Tiny Real Time Clock I2C on: September 19, 2014, 09:45:57 pm
I'm using Arduino UNO and Tiny RTC I2C. Please, help.

Read reply #3 again, or at least acknowledge that you have specifically tried that to no avail. The way things are, if iou are having all this failure where nobody else does, your softwre could be fine and the  problem is most likely due to a bad connection.
10  Using Arduino / Networking, Protocols, and Devices / Re: Tiny Real Time Clock I2C on: September 18, 2014, 07:10:28 pm
 found this the best start for the Tiny RTC

http://bildr.org/2011/03/ds1307-arduino/
11  Using Arduino / Networking, Protocols, and Devices / Re: HC-50 Bluetooth Module Not Discoverable For Pairing on: September 18, 2014, 07:02:01 pm

The notes also say that the pairing has nothing to do with the connection to the Arduino. When the Bluetooth module has power it should be discoverable by say my Android device and I should be able to pair to it.

Yes.  Flashing LED means power on and ready to connect. All Arduino is doing at that stage is providing the power.

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I can't discover it with any device, Could it be faulty?

If the LED is flashing and nothing can see it, then maybe it is faulty.

Quote
You mentioned pin-row and kosher. What do you mean check the the pin-row is Kosher?

I was assuming your HC-05 is on a JY-MCU backboard or the like. The only faults I am aware of have been solder bridges between the pins. I imagine this is easily fixed. These devices popular and reliable.
12  Using Arduino / Networking, Protocols, and Devices / Re: HC-50 Bluetooth Module Not Discoverable For Pairing on: September 15, 2014, 06:35:13 pm
The HC-05 does not work with iPhone, but I guess that isn'r your problem.

You might find the following background notes useful

http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf
http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino

Check that the pin-row is kosher. A couple of users have had problems with solder bridges.
13  Using Arduino / Networking, Protocols, and Devices / Re: communication between two or more arduino by bluetooth on: September 15, 2014, 06:31:40 pm
HC-05 is a master HC-06 is slave only.

I think you could do this with a Mega, as it has four serial ports, but I don't think it is such a good idea. Bluetooth is fundamentally unsuited, and a proper solution with something like NRF24 is probably cheaper as they can work as a network i.e. you only need one at the base station.  Doing it with Bluetooth means a paired HC-05 on each serial port, which Arduino can address separately.

http://phillipecantin.blogspot.ca/2014/01/hc-05-bluetooth-link-of-2-arduino.html



14  Using Arduino / Displays / Re: help : mega 2560 & 3.5" Tft display on: September 14, 2014, 06:05:05 pm
The SD card is not covered by the display library and depends entirely on the shield.  I imagine it is typical that you have to bridge across pads or use a jumper before you can use the SD. You also need to know which pis is used to select the card, it might not be the usual pin 4. In my case it was pin 53, i.e. it is called for both select and output.

Code:
#include <SD.h>
// set up variables using the SD utility library functions:
Sd2Card card;
SdVolume volume;
SdFile root;

// change this to match your SD shield or module;
// Arduino Ethernet shield: pin 4
// Adafruit SD shields and modules: pin 10
// Sparkfun SD shield: pin 8
const int chipSelect = 53;   

void setup()
  pinMode(53, OUTPUT);     
15  Using Arduino / Project Guidance / Re: Arduino + HC-05 bluetooth module on: September 13, 2014, 09:51:58 pm
Essentially, yes to both. Ditching software serial is also a good idea.
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