def getDistanceFromAP(wifiname, signalAttenuation, ref_distance, ref_signal,
n_iter):
rssi_scanner = rssi.RSSI_Scan('wlan0')
ap_info = np.zeros(n_iter)
#t0=time.time()
for i in range(0, n_iter):
ap_info[i] = getAPinfo(rssi_scanner, networks=wifiname,
sudo=True)[0]['signal']
print(i, ap_info[i])
#t1=time.time()
#print('Running time: ', t1-t0)
fl = open('m5.csv', 'w')
writer = csv.writer(fl)
for values in ap_info:
writer.writerow([values])
fl.close()
signalStrength = sum(ap_info) / n_iter
print('Average signal: ', signalStrength)
# for signalAttenuation in np.arange(1.0,4.0,0.1):
beta_numerator = float(ref_signal - signalStrength)
beta_denominator = float(10 * signalAttenuation)
beta = beta_numerator / beta_denominator
distanceFromAP = round(((10**beta) * ref_distance), 4)
print(signalAttenuation, distanceFromAP)
return distanceFromAP
def wifi_publisher():
# Initializes node
rospy.init_node("wifi_signals", anonymous=True)
# Publisher
pub = rospy.Publisher("wifi_strength", Int32, queue_size=10)
print("Initializing WiFi signal...")
# Select the correct interface (depends on the machine)
interface = "wlp3s0"
rssi_scanner = rssi.RSSI_Scan(interface)
# List of access points to scan
ssids = ['eduroam']
while not rospy.is_shutdown():
ap_info = rssi_scanner.getAPinfo(networks=ssids, sudo=True)
if type(ap_info) is not bool:
print(ap_info)
minimo = float("inf")
for ap in ap_info:
if abs(ap["signal"]) < minimo:
minimo = ap["signal"]
# print(minimo)
pub.publish(minimo)
def main(args):
"""
:param args: arguements given by the user
arguments for main:
Required:
-nwi: the name of your WIFI interface.
For MAC users, use this terminal command: system_profiler SPNetworkDataType | grep Wi-Fi -A10
The name is denoted by "BSD Device Name", in my case, it's en0
-itv: time interval between samples, unit = millisecond
-drt: the duration during which to capture samples, unit = millisecond
Optional:
-ave: take the average of give number of samples
"""
# start parsing arguments
nt_interface = args.nwInterface
sampling_interval = args.interval
sampling_duration = args.duration
num_samples = int(sampling_duration / sampling_interval)
config_msg = 'The WI-FI interface for scanning is ' + nt_interface
sampling_msg = 'This will take ' + str(num_samples) + ' samples in ' + str(
sampling_duration) + ' ms.\nPress enter to continue...'
input(config_msg + '\n' + sampling_msg)
# end of parsing arguments
# initialize scanner
rssi_scanner = rssi.RSSI_Scan(nt_interface)
def getAP():
interface = 'wlan0'
rssi_scanner = rssi.RSSI_Scan(interface)
ssids = ['GL-MT300N-V2-bd4', 'GL-MT300N-V2-303', 'GL-MT300N-V2-d22', 'GL-MT300N-V2-d2a']
ap_info = rssi_scanner.getAPinfo(ssids, sudo=True)
return ap_info
def radius(): interface = 'wlan0' rssi_scanner = rssi.RSSI_Scan(interface) ssids = ['Aj*','linksys'] # sudo argument automatixally gets set for 'false', if the 'true' is not set manually. # python file will have to be run with sudo privileges. ap_info = rssi_scanner.getAPinfo(networks=ssids,sudo=True) #dist = rssi_scanner.getDistanceFromAP(sudo=True) #print(ap_info[0]['signal']) #calculating the distance using the formula rss=ap_info[0]['signal'] Ptx=-63 n = 1.8 distance = 10**((Ptx-rss)/(10*n)) return (distance)
def get_RSSI(iteration): interface = 'wlan0' rssi_scanner = rssi.RSSI_Scan(interface) ssids = ['JayHotSpot'] rssi_val = 0 rssi_list = [] for x in range(0, iteration): info = rssi_scanner.getAPinfo(networks=ssids, sudo=True) if info != False and len(info) > 0: for network in info: rssi_list.append(int(network['signal'])) if len(rssi_list) > 0: rssi_val = max(set(rssi_list), key=rssi_list.count) return rssi_val
def handle_wifi_signals(req):
# Select the correct interface (depends on the machine)
interface = "wlp3s0"
rssi_scanner = rssi.RSSI_Scan(interface)
# List of access points to scan
ssids = [req.ssid]
ap_info = rssi_scanner.getAPinfo(networks=ssids, sudo=True)
if type(ap_info) is not bool:
minimo = float("inf")
for ap in ap_info:
if abs(ap["signal"]) < minimo:
minimo = ap["signal"]
return (minimo)
else:
return (0)
import rssi
from time import sleep, time
import socket
host = socket.gethostname()
port = 5005
BUFFER_SIZE = 2000
tcpClientA = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
interface = 'wlan0'
rssi_scanner = rssi.RSSI_Scan(interface)
ssids = ['pi-mobile']
TCP_IP = "192.168.16.1"
# Variables from power regression of RSSI data
# distance=A*(r/t)^B+C
# where r is the RSSI value and t is the RSSI at 1m
A = 0.812080813887844
B = 3.63550212364731
C = 0.1879191861
t = -37
now = time()
rollingaverage = []
collecttime = 5 # how long to average before sending data
avgamt = 60 # how many datapoints for rolling average
while True:
MESSAGE = ""
# get RSSI data
ap_info = rssi_scanner.getAPinfo(networks=ssids, sudo=True)
def get_all_aps():
rssi_scanner = rssi.RSSI_Scan('enp33s0')
ap_info = rssi_scanner.getAPinfo()
print(ap_info)
def __init__(self, host, port, interface, ssid):
self.ssids = [ssid]
self.rssi_scanner = rssi.RSSI_Scan(interface)
self.get_connection(host, port)
def getAPinfo(self, networks=False, sudo=False):
# TODO implement error callback if error is raise in subprocess
# Unparsed access-point listing. AccessPoints are strings.
raw_scan_output = self.getRawNetworkScan(sudo)['output']
print(raw_scan_output)
# Parsed access-point listing. Access-points are dictionaries.
all_access_points = formatCells(self, raw_scan_output)
print(all_access_points)
# Checks if access-points were found.
if all_access_points:
# Checks if specific networks were declared.
if networks:
# Return specific access-points found.
return self.filterAccessPoints(all_access_points, networks)
else:
# Return ALL access-points found.
return all_access_points
else:
# No access-points were found.
return False
# rssi_scanner = rssi.RSSI_Scan('wlan0')
for i in range(0,10):
rssi_scanner = rssi.RSSI_Scan('wlan0')
print(rssi_scanner.getRawNetworkScan(True)['output'])
rssi_scanner = rssi.RSSI_Scan('wlan0')
print(rssi_scanner.getRawNetworkScan(True))
# print(getAPinfo(rssi_scanner, networks='EdgeCloud1', sudo=True))
import rssi
import numpy as np
rssi_scanner = rssi.RSSI_Scan('en6')
ap_info = rssi_scanner.getAPinfo(sudo=True)
def __init__(self, interface, ssid):
self.interface = interface
self.ssid = ssid
self.rssi_scanner = rssi.RSSI_Scan(interface)
print("init rssi scanner")
def __init__(self):
self.interface = 'wlan0'
self.rssi_scanner = rssi.RSSI_Scan(self.interface)
self.config = configparser.ConfigParser()
self.config.read(mapping.online_status)
