The link for shields I'm using:
http://www.robotshop.com/content/PDF/dfrobot-arduino-shields-manual.pdf
(The first shield, as you can see is prepared for the Apc220)
The link for apc220:
http://www.yerobot.com/products/manual/APC220%20Mannual.pdf
The relevant code is as easy as:
void setup(){
Serial.begin(19200);
}
void loop(){
Serial.println("5");
}
At 9600 runs good, but 19200 no way... maybe old version of apc220?
thanks