YACWC

2026-08-31 22:43:51 -04:00
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+# SPDX-FileCopyrightText: 2018 Brent Rubell for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+Example for using the RFM69HCW Radio with Raspberry Pi.
+
+Learn Guide: https://learn.adafruit.com/lora-and-lorawan-for-raspberry-pi
+Author: Brent Rubell for Adafruit Industries
+"""
+from datetime import datetime
+# Import Python System Libraries
+import time
+from datetime import datetime
+# Import Blinka Libraries
+import busio
+from digitalio import DigitalInOut, Direction, Pull
+import board
+# Import the SSD1306 module.
+# import adafruit_ssd1306
+# Import the RFM69 radio module.
+import adafruit_rfm69
+# import numpy as np
+import ctypes
+import struct
+import pickle
+import os
+# # 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
+
+# # Button C
+# btnC = DigitalInOut(board.D12)
+# btnC.direction = Direction.INPUT
+# btnC.pull = Pull.UP
+
+# # Create the I2C interface.
+# i2c = busio.I2C(board.SCL, board.SDA)
+
+# # 128x32 OLED Display
+# reset_pin = DigitalInOut(board.D4)
+# display = adafruit_ssd1306.SSD1306_I2C(128, 32, i2c, reset=reset_pin)
+# # Clear the display.
+# display.fill(0)
+# display.show()
+# width = display.width
+# height = display.height
+
+# Configure Packet Radio
+CS = DigitalInOut(board.CE1)
+RESET = DigitalInOut(board.D25)
+spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+rfm69 = adafruit_rfm69.RFM69(spi, CS, RESET, 434.0, high_power=True)
+prev_packet = None
+# 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'
+rfm69.encryption_key = None;
+rfm69.tx_power=20;
+
+def unpack_uint8(m):
+    return struct.unpack('B'*len(m), m)
+
+def send_now():
+    rfm69.idle()
+
+    n = datetime.now()
+    add_this = [n.second,n.minute,n.hour,n.day,n.month,n.year-2000,n.isoweekday()]
+    b_ar = bytearray();
+    for x in add_this:
+        b_ar += ctypes.c_uint8(x)
+    msg_send = b_ar;
+    
+    for i in range(3):
+        rfm69.send(msg_send, flags=2, keep_listening = True);  # Date time return request
+        time.sleep(0.05);
+
+    print('SENT:\t\t',unpack_uint8(msg_send))
+    # print("Sent!", add_this);
+
+
+send_now();
+while True:
+    # send_now();
+    packet = None
+    packet = rfm69.receive(with_header = True)
+    if packet is not None:
+        #  = packet
+        print('====================================')
+        print('RECEIVED:\t',unpack_uint8(packet))
+
+        packet_flag = packet[3]
+        print('FLAG:\t',packet_flag)
+        if packet_flag == 1:
+            send_now();
+
+        if packet_flag == 31:
+            if not os.path.exists('packet_dump'):
+                pickle.dump(packet, open('packet_dump','wb'));
+
+        # print(packet_flag, prev_packet);
+        # packet_text = str(prev_packet[4:], "utf-8")
+        # print(packet_text)
+    # time.sleep(0.01)
+