Long time no see... I had time to work on my sensors lately and here are some pictures of my humidity sensor which is running here for three months now:
[image: 1454090345509-img_00061.jpg]
[image: 1454090408434-img_00041.jpg]
[image: 1454090608793-img_00031.jpg]
I left out the power regulator shown above and also desoldered the LED and voltage regulator of the Arduino to safe power. The sensor is directly powered by 3.7V of the lithium battery. The voltage is measured and the battery will be recharged when it goes down.
Since I also built a 3D printer lately, I was able to put the sensor into a little box. Now I can easily measure humidity and temperature in my bath room and see it in fhem on a raspberry.
Currently I'm working on my next pcb... I will show the next one when I'm finished in a new thread.
