The KY-022 is equipped with three pins. It responds to a frequency of 38kHz at 940nm. This signal is sent via the digital output. If an IR signal is detected, the LED module on board will light up. This sensor module can be used to decode remote controls for home theaters and other remote controls that use IR.
Device Pinout and Schematics:
1 x KY-022 INFRARED SENSOR Module
This module has three pins:
KY-022 INFRARED SENSOR Module for Arduino
Wiring with Arduino board:
- KY-022 Sensor GND - Arduino GND
- KY-022 Sensor Vcc+ - Arduino +5V
- KY-022 Sensor Signal - Arduino PIN 10
KY-022 INFRARED SENSOR Module connections with raspberry pi
import RPi.GPIO as GPIO from time import time def setup(): GPIO.setmode(GPIO.BOARD) # Numbers GPIOs by physical location GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) def binary_aquire(pin, duration): # aquires data as quickly as possible t0 = time() results =  while (time() - t0) < duration: results.append(GPIO.input(pin)) return results def on_ir_receive(pinNo, bouncetime=150): # when edge detect is called (which requires less CPU than constant # data acquisition), we acquire data as quickly as possible data = binary_aquire(pinNo, bouncetime/1000.0) if len(data) < bouncetime: return rate = len(data) / (bouncetime / 1000.0) pulses =  i_break = 0 # detect run lengths using the acquisition rate to turn the times in to microseconds for i in range(1, len(data)): if (data[i] != data[i-1]) or (i == len(data)-1): pulses.append((data[i-1], int((i-i_break)/rate*1e6))) i_break = i # decode ( < 1 ms "1" pulse is a 1, > 1 ms "1" pulse is a 1, longer than 2 ms pulse is something else) # does not decode channel, which may be a piece of the information after the long 1 pulse in the middle outbin = "" for val, us in pulses: if val != 1: continue if outbin and us > 2000: break elif us < 1000: outbin += "0" elif 1000 < us < 2000: outbin += "1" try: return int(outbin, 2) except ValueError: # probably an empty code return None def destroy(): GPIO.cleanup() if __name__ == "__main__": setup() try: print("Starting IR Listener") while True: print("Waiting for signal") GPIO.wait_for_edge(11, GPIO.FALLING) code = on_ir_receive(11) if code: print(str(hex(code))) else: print("Invalid code") except KeyboardInterrupt: pass except RuntimeError: # this gets thrown when control C gets pressed # because wait_for_edge doesn't properly pass this on pass print("Quitting") destroy()
3.3V to 5V
400µs to 800µs
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