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Author Topic: Arduino Uno + sim900  (Read 1184 times)
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hi i am trying to make a call or send an sms using this combination of uno and sim900

well i am using a IComSat v1.0 sim900 and arduino 1.0 to program
http://iteadstudio.com/store/images/produce/Shield/IComSat/icomsat_DS1.2.pdf
thts the datasheet...

but everytime i try to upload my program to the uno the sim900 stops responding. and then dsnt turn on.

//Serial Relay - Arduino will patch a
//serial link between the computer and the GPRS Shield
//at 19200 bps 8-N-1
//Computer is connected to Hardware UART
//GPRS Shield is connected to the Software UART
 
#include <SoftwareSerial.h>
 
SoftwareSerial mySerial(7, 8 );
 
void setup()
{
  mySerial.begin(19200);               // the GPRS baud rate   
  Serial.begin(19200);                 // the GPRS baud rate   
}
 
void loop()
{
  if (mySerial.available())
    Serial.write(mySerial.read());
  if (Serial.available())
    mySerial.write(Serial.read()); 
 
}


the program is to allow a connection and then let me use at commands to make calls or send sms but it seems to not work.

if there is a easier program please let me know
thx.
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Read the part of the data sheet about data consumption.

The board  / chip can draw anywhere between 500 and 2000mA.  Make sure your external supply is capable of providing that much current, since USB won't be able to.
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Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.c

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