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send_message.py
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send_message.py
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#!/usr/bin/env python
""" A simple beacon transmitter class to send a 1-byte message (0x0f) in regular time intervals. """
# Copyright 2015 Mayer Analytics Ltd.
#
# This file is part of 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 sys
from time import sleep
from SX127x.LoRa import *
from SX127x.LoRaArgumentParser import LoRaArgumentParser
from SX127x.board_config import BOARD
BOARD.setup()
parser = LoRaArgumentParser("A simple LoRa beacon")
parser.add_argument('--single', '-S', dest='single', default=False, action="store_true", help="Single transmission")
parser.add_argument('--wait', '-w', dest='wait', default=1, action="store", type=float, help="Waiting time between transmissions (default is 0s)")
class LoRaBeacon(LoRa):
tx_counter = 0
def __init__(self, verbose=False):
super(LoRaBeacon, self).__init__(verbose)
self.set_mode(MODE.SLEEP)
self.set_dio_mapping([1,0,0,0,0,0])
def on_rx_done(self):
print("\nRxDone")
print(self.get_irq_flags())
print(map(hex, self.read_payload(nocheck=True)))
self.set_mode(MODE.SLEEP)
self.reset_ptr_rx()
self.set_mode(MODE.RXCONT)
def on_tx_done(self):
global args
self.set_mode(MODE.STDBY)
self.clear_irq_flags()
sys.stdout.flush()
self.tx_counter += 1
sys.stdout.write("\rtx #%d" % self.tx_counter)
if args.single:
print
sys.exit(0)
BOARD.led_off()
sleep(args.wait)
self.write_payload([0x0f])
BOARD.led_on()
self.set_mode(MODE.TX)
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 toHex(s):
lst = []
for ch in s:
hv = hex(ord(ch))
if len(hv) == 1:
hv = '0'+hv
lst.append(hv)
return lst
def start(self):
global args
sys.stdout.write("\rstart")
self.tx_counter = 0
BOARD.led_on()
self.set_payload_length(8)
self.set_max_payload_length(100)
my_message = raw_input('Enter a message: ')
self.write_payload(toHex(my_message))
self.get_payload_length
self.set_mode(MODE.TX)
while True:
sleep(1)
lora = LoRaBeacon(verbose=False)
args = parser.parse_args(lora)
lora.set_pa_config(pa_select=1)
lora.set_rx_crc(True)
lora.set_agc_auto_on(True)
lora.set_lna_gain(GAIN.NOT_USED)
lora.set_coding_rate(CODING_RATE.CR4_6)
lora.set_implicit_header_mode(False)
lora.set_pa_config(max_power=15, output_power=15)
lora.set_pa_config(max_power=15, output_power=15)
lora.set_low_data_rate_optim(True)
lora.set_pa_ramp(PA_RAMP.RAMP_50_us)
print(lora)
#assert(lora.get_lna()['lna_gain'] == GAIN.NOT_USED)
assert(lora.get_agc_auto_on() == 1)
print("Beacon config:")
print(" Wait %f s" % args.wait)
print(" Single tx = %s" % args.single)
print("")
try: input("Press enter to start...")
except: pass
try:
lora.start()
except KeyboardInterrupt:
sys.stdout.flush()
print("")
sys.stderr.write("KeyboardInterrupt\n")
finally:
sys.stdout.flush()
print("")
lora.set_mode(MODE.SLEEP)
print(lora)
BOARD.teardown()