94 lines
2.6 KiB
Python
94 lines
2.6 KiB
Python
"""
|
|
Demo of using the RFM69HCW Radio with Raspberry Pi.
|
|
|
|
Author: Brent Rubell for Adafruit Industries
|
|
"""
|
|
import time
|
|
import busio
|
|
from digitalio import DigitalInOut, Direction, Pull
|
|
import board
|
|
# Import the RFM69 radio module.
|
|
import adafruit_rfm69
|
|
# Import the SSD1306 module.
|
|
import adafruit_ssd1306
|
|
|
|
# Button A
|
|
btnA = DigitalInOut(board.D5)
|
|
btnA.direction = Direction.INPUT
|
|
btnA.pull = Pull.UP
|
|
|
|
# Button B
|
|
btnB = DigitalInOut(board.D6)
|
|
btnB.direction = Direction.INPUT
|
|
btnB.pull = Pull.UP
|
|
|
|
# Create the I2C interface.
|
|
i2c = busio.I2C(board.SCL, board.SDA)
|
|
|
|
# 128x32 OLED Display
|
|
display = adafruit_ssd1306.SSD1306_I2C(128, 32, i2c, addr=0x3c)
|
|
# Clear the display.
|
|
display.fill(0)
|
|
display.show()
|
|
width = display.width
|
|
height = display.height
|
|
|
|
# Configure Packet Radio
|
|
CS = DigitalInOut(board.D18)
|
|
RESET = DigitalInOut(board.D25)
|
|
spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
|
|
rfm69 = adafruit_rfm69.RFM69(spi, CS, RESET, 915.0)
|
|
|
|
# Optionally set an encryption key (16 byte AES key). MUST match both
|
|
# on the transmitter and receiver (or be set to None to disable/the default).
|
|
rfm69.encryption_key = b'\x01\x02\x03\x04\x05\x06\x07\x08\x01\x02\x03\x04\x05\x06\x07\x08'
|
|
# Data to send
|
|
packet_data = bytes('Hello Feather!\r\n',"utf-8")
|
|
prev_packet = None
|
|
|
|
while True:
|
|
packet = None
|
|
# draw a box to clear the image
|
|
display.fill(0)
|
|
display.text('RasPi Radio', 35, 0, 1)
|
|
|
|
# check for packet rx
|
|
packet = rfm69.receive()
|
|
print(packet)
|
|
if packet is None:
|
|
display.show()
|
|
display.text('- Waiting for PKT -', 0, 20, 1)
|
|
else:
|
|
# Display the packet text and rssi
|
|
display.fill(0)
|
|
prev_packet = packet
|
|
packet_text = str(prev_packet, 'ascii')
|
|
display.text('RX: ', 0, 0, 1)
|
|
display.text(packet_text, 25, 0, 1)
|
|
display.text('RSSI: ', 0, 20, 1)
|
|
display.text(str(rfm69.rssi), 35, 20, 1)
|
|
time.sleep(2)
|
|
|
|
if not btnA.value:
|
|
# Send Packet
|
|
rfm69.send(packet_data)
|
|
display.fill(0)
|
|
display.text('Sent Packet', 0, 25, 1)
|
|
display.show()
|
|
time.sleep(0.2)
|
|
elif not btnB.value:
|
|
# Display the previous packet text and rssi
|
|
display.fill(0)
|
|
if prev_packet is not None:
|
|
packet_text = str(prev_packet, 'ascii')
|
|
display.text('RX: ', 0, 0, 1)
|
|
display.text(packet_text, 25, 0, 1)
|
|
display.text('RSSI: ', 0, 20, 1)
|
|
display.text(str(rfm69.rssi), 35, 20, 1)
|
|
else:
|
|
display.text('No Pkt RCVd', 0, 16, 1)
|
|
display.show()
|
|
time.sleep(2)
|
|
|
|
display.show()
|
|
time.sleep(0.1)
|