How to use serial port if GPS is switched to i2c?

[alexose]

Hello there,

I followed the directions for switching the GPS unit over to i2c here: https://ozzmaker.com/accessing-gps-via-i2c-on-a-berrygps-imu/

While i2c seems to work, I’m not able to use the newly freed serial port.  It works fine if I take the berrygps-imu off the board.

Maybe the GPS unit is continuing to transmit on the same TX/RX?  Any advice would be appreciated.

[Mark Williams]

i2c access for the GPS was only considered when connecting the BerryGPS-IMU via QWIIC cable.  However, we have had a number of users still want to use the BerryGPS-IMU while sitting on top of the Raspberry Pi.

Right now, you have two options;

1. connect via QWIIC cable and not have the BerryGPS-IMU sitting on the Raspberry Pi.

2. Remove the two inductors circled below.

If you want serial connection back, you can place a solder blob where the inductors where to close the connection.  The GPS will still work perfectly fine without them.

BTW: in the next version of BerryGPS-IMU, we will include jumpers on the back so it will be easier to break and restore the tx/rx connections

Mark --OzzMaker.com --

[alexose]

Thanks for the excellent, detailed answer!  This is super helpful.

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