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and obstacle avoidance module Four on the 5th battery compartment
but can handle less current than a reed switch
PUL-: pulse signal input negative
The LDR sensor module detects light and measures how bright it is
PN532 NFC-Near Field Communication RF-ID V3 Module BO Motors and obstacle avoidance module FourPN532 NFC Near Field Communication RF ID V3 Module NFC technology was derived from RFID and allows users to connect to other devices, make payments, send media and files, and use NFC tags, easily the most creative use case for the technology. You can create an NFC scanner app for practically anything, making NFC app development extremely popular. NFC technology provides a simple method of contactless communication between gadgets in close proximity.
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