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BackOptical Sensor, http://www.kingbright.com/attachments/file/psearch/000/00/00/KRC011(Ver.15).pdf Subminiature Reflective Optical Sensor Photointerrupter infrared LED diameter 5.0mm z-position of LED center 2.0mm 2 pins diameter 1.8mm size 1.8x2.4mm^2 z-position of LED center 3.0mm.
- Wi-Fi https://www.espressif.com/sites/default/files/documentation/esp32-s2-wroom_esp32-s2-wroom-i_datasheet_en.pdf 2.4 GHz Wi-Fi and.
- For projection From ad96459571a569a983e452184e49702fe8779c4e Mon.