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