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1  Using Arduino / Networking, Protocols, and Devices / Re: Using AT-Commands to setup HC-05 BT device on: Today at 02:40:35 am
One line of code won't help anybody much but you might try here:

http://forum.arduino.cc/index.php?topic=209363.0
2  Using Arduino / Displays / Re: 2x16 LCD SCREEN - NEED FOR 2X SIZE LETTERING on: July 20, 2014, 06:59:36 pm
You're right. I've found this link I had



I didn't think it was worth pursuing, and I don't know the procedure. However, since then I have had a 20x4 and that may be a e better proposition and should take a similar procedure. My graphic display has numbers 50 pixels high, and that suffices.
3  Using Arduino / Programming Questions / Re: avrdude: stk500_getsync(): not in sync: resp=0x00 error on: July 20, 2014, 06:09:50 pm
the serial port and board are correct.

Any ideas?


Bad cable?
4  Using Arduino / Displays / Re: 2x16 LCD SCREEN - NEED FOR 2X SIZE LETTERING on: July 20, 2014, 05:49:52 pm
You might find that more easily accomplished on a graphic display. They commonly have multiple font sizes and I imagine they can be made even larger.
5  Using Arduino / Project Guidance / Re: HC-05 changing PASSWORD on: July 20, 2014, 11:46:21 am
http://arduinofy.blogspot.com.au/2013/10/tutorial-programming-hc-05-at-mode-with.html
6  Using Arduino / Project Guidance / Re: Problem with max7219 ! on: July 20, 2014, 03:48:52 am

-The wiring is good.
-The scketch is good too!


Well, that's what you say, but I bet one or the other is wrong. I suppose there might even be a faint possibility that youi are using a common anode 4x7, but we'll will never know until you reveal your code and wiring.

If you find it hard to be forthcoming, you might find some useful stuff here first.

http://playground.arduino.cc/Main/MAX72XXHardware#.UxPXAc76U1I 

http://forum.arduino.cc//index.php?topic=172192.msg1279382#msg1279382
7  Using Arduino / Networking, Protocols, and Devices / Re: Arduino Wireless Bluetooth Transceiver Module phone connecting problem on: July 19, 2014, 09:03:11 pm
I'm not sure what is happening, and the IDE can stumble if you stuff up the procedures.

The USB cable connected to PC shares the serial port with bluetooth. Always ensure Blurtooth is disconnected when uploading code from PC, do not try to connect via Bluetooth on the PC while the cable is connected (why would you want to do that anyway?), but note that you can use the serial monitor on PC while Bluetooth is connected to your phone.

You may find that the COM port you think are using is actually inoperative, so check that. The simplest solution is close the IDE and start over. The IDE is not bulletproof. This particularly applies if you are swappoing Arduinos.
8  Using Arduino / Sensors / Re: Default DS18S20 example returns perplexing results on: July 19, 2014, 07:56:56 pm

Adding a library is adding variables.

No it isn't. Adding a library is adding a fixed and well-established procudure, which is quite the oppoosite and, most importantly, puts you in the same arena as the majority who don't have a problem. This is a rather good arena to be in as your only priority is to find out why you have a problem where nobody else does. It also means that the work that the library does can be eliminated from the analysis of the problem. As it is, I and many who don't have a problem,  won't bother to look at your junk code because there is no point in doing so, and thus leave you out in the cold simply because you opt for self-flagellation.

It so happens that elSupremo does use your code and declares it fine, but you can only put that down to good luck, and so you can now come to the most likely conclusion - if the code is kosher, the wiring isn't. As you rightly point out, the circuit is not complicated.

It is just faintly possible that there is some other mechanical problem. I wouldn't recommend it as standard procedure, but the link below might help sort it out. It uses no libraries at all, not even one-wire.

http://sheepdogguides.com/arduino/ar3ne1tt.htm
9  Using Arduino / Displays / Re: Arduino Uno Nokia 5110 LCD Shield on: July 19, 2014, 11:44:33 am
What you show is not a shield. It is a Nokia 5110 module that needs to be installed on a shield. It has virtually no benefit over the bare 5110 modules commonly found on eBay, but I bet it costs a lot more.
10  Topics / Home Automation and Networked Objects / Re: DS18B20 on: July 19, 2014, 09:55:57 am
Quote
Any ideas what I should check?

I am assuming that the temperature readings are OK until they get to the critical condition. Therefore, all the problems are in that arena, and there is nothing wrong with the temperature code. One thing for certain is that the delay command you already have is all you need.

I don't know anything about relays but, if you are driving them off the Arduino pins, there may be a power problem. This can be verified by running the project with the relays disconnected.

Since the temp is a float, I would be inclined to call swing and setpoint as floats. If your relay sticks at 35 but comes good at <=36, I guess using all floats is very likely the answer.
11  Using Arduino / Networking, Protocols, and Devices / Re: Bluetooth HC-05 YJ-MCU enter AT-MODE on: July 18, 2014, 08:09:03 pm
http://forum.arduino.cc/index.php?topic=209363.0
12  Using Arduino / Project Guidance / Re: Arduino ---> Android Bluetooth on: July 18, 2014, 07:50:19 pm
OK. You will get plenty of support with file transfer here.
13  Using Arduino / Sensors / Re: Default DS18S20 example returns perplexing results on: July 18, 2014, 07:39:30 pm
This may be true, but using it might assist you to identify the garbage you have but nobody else does. It would certainly be more constructive than hoping Linux will solve an Arduino problem.
14  Using Arduino / Project Guidance / Re: Arduino ---> Android Bluetooth on: July 18, 2014, 07:26:20 pm
Essentially, Android is Android, and Bluetooth is Bluetooth, So what works on the Asus shiould be fine on a Nexus. This also certainly applies as far as Arduino is concerned, as all it is doing is having a conversation with Bluetooth.

Quote
utilize the NFC reader to read a card, and send that to the Arduino

I don't know what an NFC is but, initially at least, this sounds much more like an Android problem than Arduino. However, with the only file transfer system I know of, the PC does all the work. I guess Arduino could do a similar job, but I'm not sure about the practicality.
15  Using Arduino / Project Guidance / Re: Arduino ---> Android Bluetooth on: July 18, 2014, 02:14:41 am
No library required

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
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