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46  Products / Arduino GSM Shield / Re: AT+QNITZ=1 on: June 11, 2014, 06:23:06 am
What do you mean 'does not work'?

Do you get an error message when sending the command?

Does your GSM Network support this function?
47  Using Arduino / Programming Questions / Re: errors on working code? on: June 11, 2014, 03:55:14 am
What are the following characters doing in your code?

Code:
z
  0
48  Using Arduino / Installation & Troubleshooting / Re: Please help! Arduino 5v pin broken! on: June 11, 2014, 03:44:25 am
From the photo it doesn't look like a big job to tidy it up and solder the header back on again? Once you have prised it off the shield that is!
49  Using Arduino / General Electronics / Re: Do It Yourself Jumper Wire Help on: June 11, 2014, 02:48:16 am
Personally I wouldn't call them DuPont. They (DuPont) tend to have rectangular housings, not round.

I do make my own using DuPont single way housings. The housings will accept either male or female terminals which crimp onto the wire.
50  Using Arduino / Installation & Troubleshooting / Re: Please help! Arduino 5v pin broken! on: June 10, 2014, 04:20:16 pm
As photo of your problem would help, if possible?
51  Using Arduino / Project Guidance / Re: Image sent to SMS on: June 10, 2014, 03:49:50 pm
http://forum.arduino.cc/index.php/topic,127880.0.html
52  Using Arduino / Project Guidance / Re: GPRS shield power and RTC on: June 10, 2014, 12:43:21 pm
And I've just had a quick play with the clock.

It is accessed using the AT+CCLK command, AT+CCLK? to read the time and AT+CCLK="yy/MM/dd,hh:mm:ss+zz" to set it, don't forget the time zone difference and it's two digits.

When power is disconnected the clock stops, and restarts when power reapplied. It doesn't reset.

I can't find a 1220 battery so I can check that it continues to run with one installed when the power is off, but that is my assumption.
53  Using Arduino / Project Guidance / Re: GPRS shield power and RTC on: June 10, 2014, 11:37:30 am
As to the power requirements, the SIM900 data sheet says 2 amps for 577uS (every 4.615mS) when transmitting. Figure 5 on page 22.

However, it does need to transmit just to remain in contact with the network, not only to transmit a text / sms.

I've not had a play with the clock so can't help you on that score I'm afraid.

54  Using Arduino / Networking, Protocols, and Devices / Re: Is receiving SMS messages in the UK free? on: June 09, 2014, 08:29:53 am
Why bother trying to do that? If a text costs 20p to send (and mine only cost 12p), sending one every quarter your initial top up will still last just over six years!
55  Using Arduino / Programming Questions / Re: arduino uno + sim900 linkspirit on: June 08, 2014, 10:13:17 am
Replace the two lines of your code with the following:

Code:
SIM900.println("ATS0=3");
SIM900.println("ATH");   

You are using the wrong quotation marks.
56  Using Arduino / Programming Questions / Re: Could some with Interrupt coding knowledge look over my project help me?? on: June 06, 2014, 10:47:56 am
Yes, and see if that makes a difference?
57  Using Arduino / Programming Questions / Re: Could some with Interrupt coding knowledge look over my project help me?? on: June 06, 2014, 10:39:22 am
I don't see the word Volatile in your code  smiley-wink
58  Using Arduino / Programming Questions / Re: Motor not spinning on: June 06, 2014, 09:51:51 am
Looks to me it's the red and black going out to the right, since the red is on digital pin 6 via the yellow.


That was my concern!
59  Using Arduino / Programming Questions / Re: Motor not spinning on: June 06, 2014, 09:37:10 am
Where's the motor?
60  Using Arduino / General Electronics / Re: Project Battery Drains Quickly on: June 06, 2014, 02:22:16 am
If by 9 volt battery you mean one of the small rectangular PP3 ones then you have no chance. Not only don't they have a lot of power you are immediately burning some of it off with the voltage regulator. And then you are running a motor off it?

Rechargeable single cell (AA, B, C, D)  batteries are 1.2 volts, so four of them will give you 4.8 volts. You could also consider one of the 'buck' converters to step the voltage up or down to 5 volts. I've not used one so can't offer any advice on that front.
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