RFM95 radio demo code.

Adafruit_Feather_RP2040_RFM95/Send_and_Receive_Demo/Receive_Demo/code.py

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+# SPDX-FileCopyrightText: 2023 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython Feather RP2040 RFM95 Packet Receive Demo
+
+This demo waits for a "button" packet. When the first packet is received, the NeoPixel LED
+lights up red. The next packet changes it to green. The next packet changes it to blue.
+Subsequent button packets cycle through the same colors in the same order.
+
+This example is meant to be paired with the Packet Send Demo code running
+on a second Feather RP2040 RFM95 board.
+"""
+
+import board
+import digitalio
+import neopixel
+import adafruit_rfm9x
+
+# Set up NeoPixel.
+pixel = neopixel.NeoPixel(board.NEOPIXEL, 1)
+pixel.brightness = 0.5
+
+# Define the possible NeoPixel colors. You can add as many colors to this list as you like!
+# Simply follow the format shown below. Make sure you include the comma after the color tuple!
+color_values = [
+    (255, 0, 0),
+    (0, 255, 0),
+    (0, 0, 255),
+]
+
+# Define radio frequency in MHz. Must match your
+# module. Can be a value like 915.0, 433.0, etc.
+RADIO_FREQ_MHZ = 915.0
+
+# Define Chip Select and Reset pins for the radio module.
+CS = digitalio.DigitalInOut(board.RFM_CS)
+RESET = digitalio.DigitalInOut(board.RFM_RST)
+
+# Initialise RFM95 radio
+rfm95 = adafruit_rfm9x.RFM9x(board.SPI(), CS, RESET, RADIO_FREQ_MHZ)
+
+color_index = 0
+# Wait to receive packets.
+print("Waiting for packets...")
+while True:
+    # Look for a new packet - wait up to 5 seconds:
+    packet = rfm95.receive(timeout=5.0)
+    # If no packet was received during the timeout then None is returned.
+    if packet is not None:
+        print("Received a packet!")
+        # If the received packet is b'button'...
+        if packet == b'button':
+            # ...cycle the NeoPixel LED color through the color_values list.
+            pixel.fill(color_values[color_index])
+            color_index = (color_index + 1) % len(color_values)

Adafruit_Feather_RP2040_RFM95/Send_and_Receive_Demo/Send_Demo/code.py

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+# SPDX-FileCopyrightText: 2023 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython Feather RP2040 RFM95 Packet Send Demo
+
+This demo sends a "button" packet when the Boot button is pressed.
+
+This example is meant to be paired with the Packet Receive Demo code running
+on a second Feather RP2040 RFM95 board.
+"""
+
+import board
+import digitalio
+import keypad
+import adafruit_rfm9x
+
+# Set up button using keypad module.
+button = keypad.Keys((board.BUTTON,), value_when_pressed=False)
+
+# Define radio frequency in MHz. Must match your
+# module. Can be a value like 915.0, 433.0, etc.
+RADIO_FREQ_MHZ = 915.0
+
+# Define Chip Select and Reset pins for the radio module.
+CS = digitalio.DigitalInOut(board.RFM_CS)
+RESET = digitalio.DigitalInOut(board.RFM_RST)
+
+# Initialise RFM95 radio
+rfm95 = adafruit_rfm9x.RFM9x(board.SPI(), CS, RESET, RADIO_FREQ_MHZ)
+
+while True:
+    button_press = button.events.get()
+    if button_press:
+        if button_press.pressed:
+            rfm95.send(bytes("button", "UTF-8"))