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StefanoZ

Member Since 20 Nov 2010
Offline Last Active Oct 12 2011 11:33 PM
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Posts I've Made

In Topic: Power consumption problem

01 March 2011 - 07:48 AM

Chances are you are using a large amount of current and that's why your batteries are running out fast. A 9v battery can run 500mA for roughly an hour. I would figure out how much current you are using and look for a battery that can supply that for the amount of time you are expecting it to run for.


It seems the unit consumes 90 mA with the LCD background light switched off. Uhm, it seems a high consumption. That's why the battery is running out fast. Do you think is it possible to connect the unit directly to the 12 volts battery?

I think then I should consider to use a solar power to charge the 12 volts battery...

In Topic: Power consumption problem

01 March 2011 - 07:38 AM

He means yacht.


Yes, sorry for the mistake! ;)

In Topic: AT Commands and RS232

22 February 2011 - 08:11 AM

White flag! I give it up! Finally I decided to buy the Sparkfun Cellular Shield. It works fine!!! Now I have only a problem regarding power consumption. I will open a new topic for this. Thank you all for your suggestions. Ste.

In Topic: AT Commands and RS232

05 February 2011 - 02:21 PM

Hello, the rs232 shifter seems to work. It is linked in this way: vcc to 3.3 volt ground to ground tx to rx rx to tx As you suggested, I linked together pin 2 and pin 3 of the rs232 shifter connector. When I send something the rx led blinks, the tx led blinks and I receive back what I send. Now I'm trying to link the phone again. Perhaps the problem is the AT command line terminator...

In Topic: AT Commands and RS232

03 February 2011 - 10:15 PM

Ok, probably I bought the wrong shift register. I found this in the compatible shield section.

URF!


Ok, now I have the right rs232 shifter, but nothing to do.
When I send something to the serial port, the RX led flash, but I did not receive anything.

So, now I would like to test separately each component. What is the best way to verify that the rs232 shifter is working fine? Is it possible to connect TX to RX on the serial cable to see that I receive what I sent? Any other way to test the rs232 shifter?

Fortunately today the weather is very cold so the window is closed and I cannot throw everything outside!!! ;)

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