Simple to print Dryer Box for your filaments. I used a hotend as heating element. Probably not the best solution, but enough to get about 40°.
If you experiment with your heating system, share it with us!
Component:
-3.3V relays
-Nodemcu as microcontroller: you can configure it with your WiFi for remote control (I used Blynk App)
-Stepdown 12-5V
-12V heating element
-Display
-DHT11 as temperature and humidity sensor
-5V fan to spread the heat