4 direction detector consultation Hi, My customer require an alternative solution for below 4 direction detectors. Can you please suggest ifcompany has a similar solution? thanks. RPI-1035_tilt_Sensor.pdf Hello, Generally mmWave sensors are used for sensing the environment around the sensor for example tracking motion of cars or people. Generally it would not be used determine the tilt or orientation of the sensor itself. Amanda Hey Yue, Honestly, from that datasheet I can't even tell what a 4 direction detector sensor is. What is the application? Thanks, JD Hey Yue, After some searching, I was able to find this page that explains what a 4 direction sensor does: https://www.parallax.com/product/28036 Basically, it just detects what side is "Up." I don't thinkcompany makes anything like this, but I'll try and loop the sensing groups in to confirm. Thanks, JD for vacuum cleaner. Hello Yue, Its a bot unclear on what is needed here. Based on the little information if the requirement is for a vacuum cleaner. I am not sure if you are talking about a robotic vacuum cleaner. If its yes then I recommend a technote on using ultrasonics /lit/an/slaa909/slaa909.pdf?ts=1587959566069 for object detection. but on the previous research I would be more inclined towards an optical solution.