It's all very doable, but the main problem you'll encounter is that running a GPRS modem 24/7 takes (relatively) a substantial amount of power. Yes it can of course by provided by a solar panel PSU but don't underestimate how large this needs to be if you live in more northerly latitudes, eg to get through a UK winter. The more usual compromise is only to power up the modem at intervals (eg daily or hourly) in order to conserve power - this makes the whole approach more viable.
Apologies for linking out to another forum but you'll find this specific topic discussed in a newish forum at:
www.wxforum.net/index.php?board=103.0I've also got a set of web pages under construction that are notes on one such project. This write-up is currently far from complete, but a one-page introduction is up at:
www.weatherstations.co.uk/greatfen.htm(NB This is just a prototyping project at present and the solar PSU is not optimised as yet. At this time of year the PSU is dropping out for some days at a time, as at present. There's one further fix to be applied to correct this by steepening the angle of the panels, which should double the solar power collected, but the system is designed to carry on logging even when the live data feed to the outside drops out and - in this particular data architecture - automatically uploads all the missing data records to weatherlink.com when it does come back online.)
