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Tips and questions relating to the GPS modules from SFE
By aleksandar
I have installed a MAX3232 and attached the GPS unit to a serial port (com1) of my computer, also, i have placed an SMA connector on the antenna input of the GPS Unit to connect an external Active antenna. I am receiving the output from the GPS unit on my pc and after a short period of time it picks up numerous satellites and calculates my position. Great!

Now i would like to send commands from my PC to my gps device. I can confirm that when i use the broadcast command function in teraterm my data is being sent to the gps unit because i have checked the RX pin using an oscilloscope.

But the commands dont seem to be registering. I get no output and even when i try to turn debug on, nothing happens.

Anyone have any ideas?