msf
===
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
Installing
===============
* 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
...