@lhops for a small protocoll add the following lines to crontab
(enter crontab -e at the prompt):
@reboot echo “---- start ----” >> proto.txt
*/5 * * * * date >> proto.txt
*/5 * * * * vcgencmd measure_temp >> proto.txt
That moves the date and the temperature to a file called proto.txt every 5 minutes (and an eyecatcher at the start of the raspberry)