I have the Hilo module running ok on standalone mode through XP hyper terminal.
Can send SMS and calls ok. Hilo baud rate is set at 9600.
I was reading on a forum that the serial library on the Arduino is only good for 9600 baud. I have dropped the rate down to this but does not make any difference. The serial from the arduino is currently running at 9600. I can't get the arduino to download the code to the libelium shield. The code will download with shield removed. But when i plug the shield in and press the reset button nothing happens with the hilo module.
I have the led on pin 13 as a visual cue that the code runs ok and it is. When trying to download from the Ardunio i get the out of sync general error. There are heaps of examples of this error on line but no solution.
If I remove the USB Arduino links on the Hilo shield I can get the download to work without sync errors but will not load into the Hilo of course. There may be a problem with these links, not sure.
If anybody can give me some advice I would be very grateful. I do not have any power supply current issues as per the libelium notes. I have added the capacitor and the supply is fine. Running version 18 arduino IDE. Using Duemilanove with 328 chip.
Thanks, Greg
Best Answer
From the documentation, it looks like the Hilo shield is acting like a serial modem. Rather than "download code" to the shield, you should be using the Arduino to send "AT" commands to it.
There's sample code here.