Reads the time from an MSF radio receiver and feeds it into an NTP daemon running on a Raspberry Pi.
Copyright Ben Clifford and CQX Limited, 2013-2017
Get the hardware:
A Raspberry Pi 2
(the right kind of) MSF radio board. I use a SYM-RFT-60 from Symtrik.
Get the code
git clone https://github.com/benclifford/msf.git
Build the code
make
Attach the output of the clock module to GPIO pin 25
Configure ntpd:
Add these lines to /etc/ntpd.conf and restart ntpd:
server 127.127.28.2 fudge 127.127.28.2 refid MSF time1 0.018
and restart ntpd: sudo /etc/init.d/ntp restart
Start msf:
sudo ./start.sh
Watch a few minutes for the output to appear.
You should see the symbol . appear every time the LED on the clock module turns on or off, and after a minute or two if a decode is successful, you should see a bunch of decoding information, including a timestamp.
Move the radio board/antenna around until you get a decent signal: there should be about one pulse per second visible in the onboard LED rather than nothing, or random flickering.
After even more minutes, check ntp is receiving the time from msf.
ntpq -p
... *SHM(2) .MSF. 0 l 64 64 317 0.000 -18.261 8.695 ...