Building a custom UART interface for gpsd

[Aleks Pop Stefanija]

Hello,

I was hoping someone could direct me to more information about the "Magic Macx mod" referenced at the bottom of this document: https://gpsd.gitlab.io/gpsd/hardware.html

I am currently trying to build a custom UART interface for gpsd using a ublox ZED-F9T GNSS receiver and Raspberry Pi RP2040. The PPS output from the ublox is tied directly to the DCD# line of a custom USB UART interface. The TX/RX lines of this interface actually come from the RP2040. This is so the RP2040 can package NMEA messages from the ublox (via the ublox UART1 serial port) together with measurements from auxiliary instruments (i.e., a magnetometer and IMU). The RP2040 is running a CircuitPy and is able to read serial messages from the ublox UART1 port. Now comes the part of relaying those messages over the custom UART interface in a format, together with PPS, that can be interpreted by gpsd. It seems to me like the Magic Macx mod could be related to this problem.

thanks!

Aleks