- http://www.aliexpress.com/item/E18-D80NK-infrared-photoelectric-switch-diffuse-obstacle-avoidance-sensor-80CM-adjustable-with-DuPont-head/32852208295.html ( € 3,59 ! )
- http://robojax.com/learn/arduino/?vid=robojax-E18-D80NK-IR-Switch
4.88 mA sleeping… that’s to much for our LoRaWAN hobby
