A dual band aprs digipeater with enhanced telemetry capabilities.
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#!/usr/bin/env python3
""" An asynchronous socket <-> LoRa interface """
# MIT License
#
# Copyright (c) 2016 bjcarne
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import sys, asyncore
from time import time
from SX127x.LoRa import *
from SX127x.board_config import BOARD
BOARD.setup()
class Server(asyncore.dispatcher):
def __init__(self, host, port):
asyncore.dispatcher.__init__(self)
self.create_socket()
self.set_reuse_addr()
self.bind((host, port))
self.listen(1)
def handle_accepted(self, sock, addr):
print("Connection from %s:%s" % sock.getpeername())
self.conn = Handler(sock)
class Handler(asyncore.dispatcher):
def __init__(self, sock):
asyncore.dispatcher.__init__(self, sock)
self.databuffer = b""
self.tx_wait = 0
# when data is available on socket send to LoRa
def handle_read(self):
if not self.tx_wait:
data = self.recv(127)
print('Send:' + str(data))
lora.write_payload(list(data))
lora.set_dio_mapping([1,0,0,0,0,0]) # set DIO0 for txdone
lora.set_mode(MODE.TX)
self.tx_wait = 1
# when data for the socket, send
def handle_write(self):
if self.databuffer:
self.send(self.databuffer)
self.databuffer = b""
def handle_close(self):
print("Client disconnected")
self.close()
class LoRaSocket(LoRa):
def __init__(self, verbose=False):
super(LoRaSocket, self).__init__(verbose)
self.set_mode(MODE.SLEEP)
self.set_pa_config(pa_select=1)
self.set_max_payload_length(128) # set max payload to max fifo buffer length
self.payload = []
self.set_dio_mapping([0] * 6) #initialise DIO0 for rxdone
# when LoRa receives data send to socket conn
def on_rx_done(self):
payload = self.read_payload(nocheck=True)
if len(payload) == 127:
self.payload[len(self.payload):] = payload
else:
self.payload[len(self.payload):] = payload
print('Recv:' + str(bytes(self.payload)))
server.conn.databuffer = bytes(self.payload) #send to socket conn
self.payload = []
self.clear_irq_flags(RxDone=1) # clear rxdone IRQ flag
self.reset_ptr_rx()
self.set_mode(MODE.RXCONT)
# after data sent by LoRa reset to receive mode
def on_tx_done(self):
self.clear_irq_flags(TxDone=1) # clear txdone IRQ flag
self.set_dio_mapping([0] * 6)
self.set_mode(MODE.RXCONT)
server.conn.tx_wait = 0
if __name__ == '__main__':
server = Server('localhost', 20000)
lora = LoRaSocket(verbose=False)
print(lora)
try:
asyncore.loop()
except KeyboardInterrupt:
sys.stderr.write("\nKeyboardInterrupt\n")
finally:
lora.set_mode(MODE.SLEEP)
print("Closing socket connection")
server.close()
BOARD.teardown()