What are you using to power it? Alkaline batteries are terrible
in cold weather.

wrote:
Hi all,

My sensor has decided to pack up when the temperature drops below about
7C.
It's very difficult to tell what's occuring as trying to locate the
faulty component/s with freezer on these SMD boards is almost
impossible. The led still pulses but nothing is received even
re-registering doesn't work until the RF section warms up again. It's
not the crystal or the SAW device (I think that's what it is) as both
these when cold don't stop it from working.