i have maxsonar ultrasonic sensor with TX,RX,AN,PW pins.
i have tried using others'program to test distance using AN OR PW. both can work but can only dectect distance from 17cm to 6 meters. is there any way to dectect less than 17cm?
Btw, i want to use serial method to test distance, anyone has the program and connection?can explain a bit?thanks