Interfacing Arduino with SIM508 for calling phone

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi,

I have a SIM508 (GSM/GPRS/GPS module from SIMCOM). When I try to send a SMS directly from my pc (via AT commands in hyperterminal), everything works fine.
When I try to connect it from the Arduino (NG), it doesn't do a thing.
I have the arduino TX connected with the SIM508 RX and the arduino RX connected with the TX.
Both grounds are connected too. I read in several other posts on the forum (with Telit chips or regular phones) this should be enough.

This is my most basic code:

void setup()  {
  Serial.begin(115200);//baud rate must be 115200 for interfacing SIM508
  Serial.print("ATD0472000000"); //AT command for call 0472000000
}

void loop() {
}

Any thoughts on how to make the SIM508 call? Thank you!

2

Sorry, but I wasn't sure if you typed it out correctly..

I have the arduino TX connected with the SIM508 RX and the arduino RX connected with the RX.

TX to the RX... then RX to the RX? I'm guessing it's a typo, but it should be the TX from one to the RX of the other, and vice versa.

It's not the same phone at all, but maybe some of the info will be useful:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1248015942/14

3

Hi CaptainObvious, it was indeed a mistake. I changed it in my post.

I allready tried what's in that post, but it doesn't help me any further...

Thank you for your reply.