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LORA_SERVER.py
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#!/usr/bin/env python3
""" This program asks a client for data and waits for the response, then sends an ACK. """
# Copyright 2018 Rui Silva.
#
# This file is part of rpsreal/pySX127x, fork of mayeranalytics/pySX127x.
#
# pySX127x is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public
# License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# pySX127x is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You can be released from the requirements of the license by obtaining a commercial license. Such a license is
# mandatory as soon as you develop commercial activities involving pySX127x without disclosing the source code of your
# own applications, or shipping pySX127x with a closed source product.
#
# You should have received a copy of the GNU General Public License along with pySX127. If not, see
# <http://www.gnu.org/licenses/>.
import itertools
import time
from SX127x.LoRa import *
#from SX127x.LoRaArgumentParser import LoRaArgumentParser
from SX127x.board_config import BOARD
BOARD.setup()
BOARD.reset()
#parser = LoRaArgumentParser("Lora tester")
chars = "0123456789abcdefghijklmnopqrstuvwxyz"
class mylora(LoRa):
def __init__(self, verbose=False):
super(mylora, self).__init__(verbose)
self.set_mode(MODE.SLEEP)
self.set_dio_mapping([0] * 6)
self.var=0
def on_rx_done(self):
BOARD.led_on()
#print("\nRxDone")
self.clear_irq_flags(RxDone=1)
payload = self.read_payload(nocheck=True)
print ("Receive: ")
print(bytes(payload).decode("utf-8",'ignore')) # Receive DATA
BOARD.led_off()
time.sleep(2) # Wait for the client be ready
print ("Send: ACK")
self.write_payload([255, 255, 0, 0, 65, 67, 75, 0]) # Send ACK
self.set_mode(MODE.TX)
self.var=1
def on_tx_done(self):
print("\nTxDone")
print(self.get_irq_flags())
def on_cad_done(self):
print("\non_CadDone")
print(self.get_irq_flags())
def on_rx_timeout(self):
print("\non_RxTimeout")
print(self.get_irq_flags())
def on_valid_header(self):
print("\non_ValidHeader")
print(self.get_irq_flags())
def on_payload_crc_error(self):
print("\non_PayloadCrcError")
print(self.get_irq_flags())
def on_fhss_change_channel(self):
print("\non_FhssChangeChannel")
print(self.get_irq_flags())
def start(self):
while True:
text_to_send = ""
n = 2
for i in range(1, n+1):
for item in itertools.product(chars, repeat=i):
text_to_send = text_to_send + "".join(item)
while (self.var==0):
print ("Send: " + text_to_send)
# self.write_payload([255, 255, 0, 0, 73, 78, 70, 0]) # Send INF
self.write_payload([255, 255, 0, 0] + [ord(c) for c in text_to_send] + [0]) # Send INF
self.set_mode(MODE.TX)
time.sleep(3) # there must be a better solution but sleep() works
self.reset_ptr_rx()
self.set_mode(MODE.RXCONT) # Receiver mode
start_time = time.time()
while (time.time() - start_time < 10): # wait until receive data or 10s
pass;
self.var=0
self.reset_ptr_rx()
self.set_mode(MODE.RXCONT) # Receiver mode
time.sleep(10)
lora = mylora(verbose=False)
#args = parser.parse_args(lora) # configs in LoRaArgumentParser.py
# Slow+long range Bw = 125 kHz, Cr = 4/8, Sf = 4096chips/symbol, CRC on. 13 dBm
lora.set_pa_config(pa_select=1, max_power=21, output_power=15)
lora.set_bw(BW.BW125)
lora.set_coding_rate(CODING_RATE.CR4_8)
lora.set_spreading_factor(12)
lora.set_rx_crc(True)
#lora.set_lna_gain(GAIN.G1)
#lora.set_implicit_header_mode(False)
lora.set_low_data_rate_optim(True)
# Medium Range Defaults after init are 434.0MHz, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on 13 dBm
#lora.set_pa_config(pa_select=1)
assert(lora.get_agc_auto_on() == 1)
try:
print("START")
lora.start()
except KeyboardInterrupt:
sys.stdout.flush()
print("Exit")
sys.stderr.write("KeyboardInterrupt\n")
finally:
sys.stdout.flush()
print("Exit")
lora.set_mode(MODE.SLEEP)
BOARD.teardown()