Hi tuxfamily group, I am trying to use chrony for synchronizing system clock to GPS UTC time with 1PPS.
Below is my requirement: - Need to sync system clock with reference clocks as GPS time and 1PPS from GNSS Receiver. - The GNSS receiver connected to UART port is already in use by another module (So cant use this UART interface) - The module that accesses this UART port publishes GPS UTC time to other applications. I cannot use GPSD as the interface is already in use by another module. Can I send the GPS UTC time from the application through the Unix Domain Socket to the Chronyd. Please see below diagram of my requirement. [image: image.png] chronyd.sock was created under /var/run/chrony when I run chronyd. I wrote an application using unix domain socket and connected to socket and sent GPS UTC time in the required format accepted by chronyd. But I dont see chronyd taking this time as I see #? for SOCK and PPS reference clocks. Below are my configurations in chrony.conf file for reference clocks: refclock PPS /dev/pps1 lock GPS refid PPS refclock SOCK /var/run/chrony/chronyd.sock refid GPS Please advise how I can do this. Thanks & Regards Sarveshwar.K
