I have been using the GNNS breakout board to generate a 1Hz timing pulse. However, whenever the GPS signal is lost the timing pulse stops. I have tried to adjust the timing pulse settings in u-center but I can’t seem to get an output on TP1 even when “Lock to GNSS frequency if available” is unchecked under UBX-CFG-TP5. Does this board support any kind of hold over clock? If so, how can I enable it?
Hi,
The GNSS TP pin can output different frequencies while it is locking, and when locked. It sounds like the pulse is disabled while locking? This Arduino Library example provides more details:
https://github.com/sparkfun/SparkFun_u- … quency.ino
Best wishes,
Paul