Copernicus DIP Module RS232 not responding

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1

Dear all,

please help in the the following problem.

I purchased the GPS: Copernicus DIP Module few weeks ago…I tried communicating with the serial (rx/tx) pin but it’s not working…

connected with 3.3v supply:

firstly I opened the hyperterminal. connecting to the correct comm ports. baud: A: 38.4k and B 4.8k, proper parity and stop bits: all according to the guide…

I have proper circuit converting the RS232 level to TTL/CMOS…but no respond…

then I download the GPS monitor software…also not responding…

all the trial was done in the lab…not outside of the building (if it does matter…)…

please help me!!!

2

I know nothing about the copernicus module but have you verified that your rs232 driver circuit is correct? The way to do thatis to remove the copernicus and short the tx/rx pins that would normally connect to the copernicus. Then fire up hyperterminal and see if it echoes what you type on the screen. If it doesn’t then check your cable/serial connection - short pins 2 and 3 on the cable and you should get the same echoes when you type. If that works then you did something wrong with the rs232 driver circuit. If it doesn’t then your serial cable/hyperterm/com port is at fault.

Phil

3

Make sure you have RxD and TxD connected the right way round. Some modules transmit on RxD and receive on TxD.

Leon

4

Guys,

had tried many ways…serial driver circuit works fine…

I just connect the Vcc,Gnd,Rx and Tx to the GPS module…all other pins are untouched…

I afraid this module require some configuration to the pins before it could works…but so far i haven’t found any document saying that…

or this module is dead…should I return this one and replaced with new one!!!..

please help…

5

kamarulafizam

you must have 10K resistor from XRESET to VCC !

6

double check the connection diagramm from this document:

http://trl.trimble.com/docushare/dsweb/ … 08RevC.pdf

7

thank you guys,…it finally works…I missed those extra connections…

8

kamarulafizam:
Dear all,

please help in the the following problem.

I purchased the GPS: Copernicus DIP Module few weeks ago…I tried communicating with the serial (rx/tx) pin but it’s not working…

connected with 3.3v supply:

firstly I opened the hyperterminal. connecting to the correct comm ports. baud: A: 38.4k and B 4.8k, proper parity and stop bits: all according to the guide…

I have proper circuit converting the RS232 level to TTL/CMOS…but no respond…

then I download the GPS monitor software…also not responding…

all the trial was done in the lab…not outside of the building (if it does matter…)…

please help me!!!

Greetings

At least you must read the data, even with gps position data available. Check in the sparkfun site, the schematic for the Copernicus DIP Module; and specially, the schematic for a Demo Board usefully for various gps modules, included the Copernicus DIP Module. In this schematic, you can see the needed connections between you gps module and the max3232 (this works at 3.3 V).

Good Luck!

9

kamarulafizam:
thank you guys,…it finally works…I missed those extra connections…

I got the same problem with the Copernicus DIP Module.

I got a 100ohm resistor to VCC for the Reset pin (in the manual it’s written less then 10k)

But even with a 10k resistor I don’t get any data.

I use a Breakout Board for FT232RL USB to Serial and the HyperTerminal or the Trimble Studio.

EDIT: Got it working with this shematic:

http://www.erdw07.ch/shematic.png

Thx

Geko

10

Just tried to solder the wires on and I think ive got the same thing, I am going to connect xreset and xstandby to output pins on my fpga board, Tell me are you gettinga flat 3.3.v or a flat 0v out of the serial pins?