Code for IR guide.

Circuit_Playground_Express_and_IR/CPX_IR_CPX_transmit.py

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+import time
+from adafruit_circuitplayground.express import cpx
+import adafruit_irremote
+import pulseio
+import board
+
+# Create a 'pulseio' output, to send infrared signals on the IR transmitter @ 38KHz
+pwm = pulseio.PWMOut(board.IR_TX, frequency=38000, duty_cycle=2 ** 15)
+pulseout = pulseio.PulseOut(pwm)
+# Create an encoder that will take numbers and turn them into NEC IR pulses
+encoder = adafruit_irremote.GenericTransmit(header=[9500, 4500], one=[550, 550],
+                                            zero=[550, 1700], trail=0)
+
+while True:
+    if cpx.button_a:
+        print("Button A pressed!")
+        cpx.red_led = True
+        encoder.transmit(pulseout, [255, 2, 255, 0])
+        cpx.red_led = False
+        # wait so the receiver can get the full message
+        time.sleep(0.2)
+    if cpx.button_b:
+        print("Button B pressed!")
+        cpx.red_led = True
+        encoder.transmit(pulseout, [255, 2, 191, 64])
+        cpx.red_led = False
+        time.sleep(0.2)

Circuit_Playground_Express_and_IR/CPX_IR_Remote_Recieve.py

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+import pulseio
+import board
+import adafruit_irremote
+
+# Create a 'pulseio' input, to listen to infrared signals on the IR receiver
+pulsein = pulseio.PulseIn(board.IR_RX, maxlen=120, idle_state=True)
+# Create a decoder that will take pulses and turn them into numbers
+decoder = adafruit_irremote.GenericDecode()
+
+while True:
+    pulses = decoder.read_pulses(pulsein)
+    try:
+        # Attempt to convert received pulses into numbers
+        received_code = decoder.decode_bits(pulses, debug=False)
+    except adafruit_irremote.IRNECRepeatException:
+        # We got an unusual short code, probably a 'repeat' signal
+        # print("NEC repeat!")
+        continue
+    except adafruit_irremote.IRDecodeException as e:
+        # Something got distorted or maybe its not an NEC-type remote?
+        # print("Failed to decode: ", e.args)
+        continue
+
+    print("NEC Infrared code received: ", received_code)
+    if received_code == [255, 2, 255, 0]:
+        print("Received NEC Vol-")
+    if received_code == [255, 2, 127, 128]:
+        print("Received NEC Play/Pause")
+    if received_code == [255, 2, 191, 64]:
+        print("Received NEC Vol+")

Circuit_Playground_Express_and_IR/CPX_IR_as_Input.py

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+import pulseio
+import board
+import adafruit_irremote
+from adafruit_circuitplayground.express import cpx
+
+# Create a 'pulseio' input, to listen to infrared signals on the IR receiver
+pulsein = pulseio.PulseIn(board.IR_RX, maxlen=120, idle_state=True)
+# Create a decoder that will take pulses and turn them into numbers
+decoder = adafruit_irremote.GenericDecode()
+
+while True:
+    pulses = decoder.read_pulses(pulsein)
+    try:
+        # Attempt to convert received pulses into numbers
+        received_code = decoder.decode_bits(pulses, debug=False)
+    except adafruit_irremote.IRNECRepeatException:
+        # We got an unusual short code, probably a 'repeat' signal
+        # print("NEC repeat!")
+        continue
+    except adafruit_irremote.IRDecodeException as e:
+        # Something got distorted or maybe its not an NEC-type remote?
+        # print("Failed to decode: ", e.args)
+        continue
+
+    print("NEC Infrared code received: ", received_code)
+    if received_code == [255, 2, 255, 0]:
+        print("Button A signal")
+        cpx.pixels.fill((130, 0, 100))
+    if received_code == [255, 2, 191, 64]:
+        print("Button B Signal")
+        cpx.pixels.fill((0, 0, 0))
+        cpx.play_tone(262, 1)