src/measure_ring_distance.py

   1 #!/usr/bin/env python3
   2 #
   3 # measure_ring_distance - measure the time between two rings in the same call
   4 #
   5 # Copyright (C) 2015  Antonio Ospite <ao2@ao2.it>
   6 #
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 from savemysugar.cumulative_average import cumulative_average
  21 from savemysugar.Modem import Modem
  22 import time
  23
  24
  25 class Rings(object):
  26     previous_time = -1
  27     average_distance = 0
  28     min_distance = 10000
  29     max_distance = -1
  30     count = 0
  31
  32
  33 def on_ring():
  34     Rings.count += 1
  35
  36     if Rings.previous_time == -1:
  37         print("First ring")
  38         Rings.previous_time = time.time()
  39     else:
  40         new_time = time.time()
  41         distance = new_time - Rings.previous_time
  42         Rings.previous_time = new_time
  43         Rings.min_distance = min(Rings.min_distance, distance)
  44         Rings.max_distance = max(Rings.max_distance, distance)
  45         Rings.average_distance = cumulative_average(Rings.average_distance,
  46                                                     Rings.count - 1, distance)
  47         print()
  48         print("Other ring")
  49         print("distance: %f" % distance)
  50         print("min_distance: %f" % Rings.min_distance)
  51         print("max_distance: %f" % Rings.max_distance)
  52         print("average_distance: %f" % Rings.average_distance)
  53         uncertainty = (Rings.max_distance - Rings.min_distance) / 2.
  54         print("uncertainty: %f" % uncertainty)
  55
  56
  57 def measure_ring_distance(ingoing_port, outgoing_port, destination_number):
  58     ingoing_modem = Modem(ingoing_port)
  59     ingoing_modem.register_callback("RING", on_ring)
  60     outgoing_modem = Modem(outgoing_port)
  61
  62     outgoing_modem.send_command("ATDT" + destination_number)
  63
  64     try:
  65         ingoing_modem.get_response_loop()
  66     except KeyboardInterrupt:
  67         outgoing_modem.send_command("ATH")
  68         outgoing_modem.get_response()
  69
  70
  71 def main():
  72     import sys
  73     if len(sys.argv) != 4:
  74         print("usage: %s" % sys.argv[0],
  75               "<ingoing serial port> <outgoing serial port>",
  76               "<destination number>")
  77         sys.exit(1)
  78
  79     measure_ring_distance(sys.argv[1], sys.argv[2], sys.argv[3])
  80
  81
  82 if __name__ == "__main__":
  83     main()