99 lines
2.7 KiB
Python
99 lines
2.7 KiB
Python
# SPDX-FileCopyrightText: 2018 Brent Rubell for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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Example for using the RFM69HCW Radio with Raspberry Pi.
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Learn Guide: https://learn.adafruit.com/lora-and-lorawan-for-raspberry-pi
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Author: Brent Rubell for Adafruit Industries
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"""
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# Import Python System Libraries
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import time
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# Import Blinka Libraries
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import busio
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from digitalio import DigitalInOut, Direction, Pull
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import board
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# Import the SSD1306 module.
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import adafruit_ssd1306
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# Import the RFM69 radio module.
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import adafruit_rfm69
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# Button A
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btnA = DigitalInOut(board.D5)
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btnA.direction = Direction.INPUT
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btnA.pull = Pull.UP
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# Button B
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btnB = DigitalInOut(board.D6)
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btnB.direction = Direction.INPUT
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btnB.pull = Pull.UP
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# Button C
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btnC = DigitalInOut(board.D12)
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btnC.direction = Direction.INPUT
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btnC.pull = Pull.UP
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# Create the I2C interface.
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i2c = busio.I2C(board.SCL, board.SDA)
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# 128x32 OLED Display
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reset_pin = DigitalInOut(board.D4)
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display = adafruit_ssd1306.SSD1306_I2C(128, 32, i2c, reset=reset_pin)
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# Clear the display.
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display.fill(0)
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display.show()
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width = display.width
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height = display.height
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# Configure Packet Radio
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CS = DigitalInOut(board.CE1)
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RESET = DigitalInOut(board.D25)
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spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
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rfm69 = adafruit_rfm69.RFM69(spi, CS, RESET, 915.0)
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prev_packet = None
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# Optionally set an encryption key (16 byte AES key). MUST match both
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# on the transmitter and receiver (or be set to None to disable/the default).
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rfm69.encryption_key = b'\x01\x02\x03\x04\x05\x06\x07\x08\x01\x02\x03\x04\x05\x06\x07\x08'
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while True:
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packet = None
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# draw a box to clear the image
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display.fill(0)
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display.text('RasPi Radio', 35, 0, 1)
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# check for packet rx
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packet = rfm69.receive()
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if packet is None:
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display.show()
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display.text('- Waiting for PKT -', 15, 20, 1)
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else:
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# Display the packet text and rssi
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display.fill(0)
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prev_packet = packet
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packet_text = str(prev_packet, "utf-8")
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display.text('RX: ', 0, 0, 1)
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display.text(packet_text, 25, 0, 1)
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time.sleep(1)
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if not btnA.value:
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# Send Button A
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display.fill(0)
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button_a_data = bytes("Button A!\r\n","utf-8")
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rfm69.send(button_a_data)
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display.text('Sent Button A!', 25, 15, 1)
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elif not btnB.value:
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# Send Button B
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display.fill(0)
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button_b_data = bytes("Button B!\r\n","utf-8")
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rfm69.send(button_b_data)
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display.text('Sent Button B!', 25, 15, 1)
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elif not btnC.value:
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# Send Button C
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display.fill(0)
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button_c_data = bytes("Button C!\r\n","utf-8")
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rfm69.send(button_c_data)
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display.text('Sent Button C!', 25, 15, 1)
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display.show()
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time.sleep(0.1)
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