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getting-rssi.py
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getting-rssi.py
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# -*- coding: utf-8 -*-
from bluepy.btle import Scanner, DefaultDelegate
from datetime import datetime
import numpy as np
import time
import math
class ScanDelegate(DefaultDelegate):
def __init__(self):
DefaultDelegate.__init__(self)
def handleDiscovery(self, dev, isNewDev, isNewData):
""" if isNewDev:
print "Discovered device", dev.addr
elif isNewData:
print "Received new data from", dev.addr """
def imprime(rssi):
print '\x1b[2J\x1b[1;1H'
print '\n RSSI:',rssi,'dbm'
print ' Contador: ', count
n = 3.00
expoenteDist = -rssi-59/(10*n)
distancia = math.pow(10, expoenteDist)
distancias.append(distancia)
print '\n Distancia:', distancia , 'm'
def moving_average(a, n=3) :
ret = np.cumsum(a, dtype=float)
ret[n:] = ret[n:] - ret[:-n]
return ret[n - 1:] / n
nomeDoArquivo = raw_input("\nArquivo: ") # sem extensão
nomeDoArquivo = "dados/experimento8 (obstruido)/" + nomeDoArquivo + ".txt"
arquivo = open(nomeDoArquivo, 'w')
rssiList = []
distancias = []
timeout, start_time = time.time() + 600, datetime.now()
count = 0
while True:
if (count >= 100):
break
# index is the hci port number of blutooth device, you can consult on terminal with command $ "rfkill"
# timeout is a timer o scanner on while loop, it works as a delay
scanner = Scanner(1).withDelegate(ScanDelegate())
devices = scanner.scan(timeout = 3)
for dev in devices:
if (dev.addr == "c8:fd:19:37:2b:0a"):
count += 1
imprime(dev.rssi)
rssiList.append(dev.rssi)
end_time = datetime.now()
arquivo.write(str(rssiList))
arquivo.write('\n')
arquivo.write(str(distancias))
arquivo.write('\n')
arquivo.write('Experiment time: {} '.format(end_time - start_time))
arquivo.close()
print('\n Experiment time: {} '.format(end_time - start_time))