Note: I posted a similar topic in "project guidance", but I realize that this is a section more relevant to my problems (I hope!)
Hi! I have purchased a Trimble Copernicus II GPS unit and I am trying to read its data on the serial monitor with an Arduino Uno. The unit came soldered onto a board with leads for 5v RS-232 and 3.3v TTL level outputs. I have tried hooking up the TTL output lead to the Uno's RX pin, but the serial monitor did not output anything. I tried using the SoftwareSerial library with pin 10 receiving, but it made no difference. I used this code during my testing:
Serial.println("It works, so far");
if (Serial.available()>0) // if there is data coming into the serial line
aa = Serial.read(); // get the byte of data
Serial.print(byte(aa)); // send it to the serial monitor
I don't understand why nothing is being outputted. The GPS unit warms up when I apply power, and I can see that it updates itself every second by reading the data leads with a voltmeter. Can I please have some help with this? Thank you!