Serial software pin with change interrups, GPS not communicating with qbcan compact

[Jai_Davey]

Hi all.

I am a mentor for the Cansat project at east kent college and we are having problems with getting information from the U-Blox NEO-6M GPS module for Arduino and getting no information from it to the computer, it works on normal Leonardo/Arduino boards just not on the QBcan boards, we have connected the GPS on all of the digital i/o pins also on the boards RXI and TXO pins. The pins the GPS uses are RXD and TXD. hope you have some information on this issue.

Thanks,
Jai

[jordi]

Hi Jai,
I understand you are referring to qbcan compact boards.
Could you post the code here so we can take a look at it and we will check and get back to you.
Thanks,

[Jai_Davey]

thanks for the reply
and yes i am referring to the QBcan Compact board and we thought it was the change from pro micro to Leonardo might of changed the pins on the pin header but we tested this and it was the same as the diagram.
and the code we are using for this test is on our git hub which is at this link
https://github.com/EKCspitfires/Cansat-testing-code-2016-2017
and it will be the GPS device test file

thanks.

[jordi]

Hi Jai,

I've looked at your code and you are using software serial for the gps connection specifying pins 4 as Rx and 3 as Tx.
The qbcan compact shares schematics with micro Pro and Leonardo which they only have the following pins that support change interrupts needed for the software specified serial: D8, D9, D14 (MISO), D15 (SCK), D16 (MOSI).
D10 and D11 are not available in the qbcan compact payload connector.

Try specifying one of those pins for the software serial connection or use the hardware UART (serial1) connection.

Cheers,