@seblm I think my method was a little idiosyncratic. If I remember correctly I used a DHT11 temperature sensor, and wrote c code to take a reading and insert it in the database. I just set that c code up as a cron job. I used shell scripts and cron jobs to do my data replication, database dumps and rsyncs if I remember correctly.

There are lots of ways to skin the cat, and if you search for raspberry pi DHT11 (or DHT22) there will be lots of examples.