I got my Pi working with R and currently i program it to pull some data, generate some charts and send email to myself periodically. My Pi is working 24/7 and i got some concern on its temperature as i can feel the heat when i touch the casing. So what is the optimum operating temperature for Pi?
Here is the my Pi's CPU temperature collected over 50 minutes (10 seconds resolution) using 'vcgencmd measure_temp'. Based on the reading, average idling temperature is 38 degree, 40 degree when CPU 100% load.