wireless_info_sender.py

import os
import requests
import json
import sys
import time

while True:
    signal_strengths = {}
    quality = None
    wifi_info = os.popen("iwlist wlan0 scan")
    for line in wifi_info:
        if line.strip().startswith("ESSID"):
            sid = line[line.index("\"") + 1: len(line) - 2]
            if not "\\" in sid: signal_strengths[sid] = quality;
        elif line.strip().startswith("Quality"):
            quality = float(line[line.index("=") + 1: line.index("/")]) / float(line[line.index("/") + 1:line.index("Signal") - 2])
    print json.dumps(signal_strengths)
    data = json.dumps({"index": sys.argv[1], "data": signal_strengths})
    headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
    print data
    r = requests.post("http://localhost:8080/logData", data=data, headers=headers)
    time.sleep(3)