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bluetooth-RPi-wifi.py
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bluetooth-RPi-wifi.py
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import os
import subprocess
import select
import serial
import time
import json
import re
wpa_supplicant_conf = "/etc/wpa_supplicant/wpa_supplicant.conf"
sudo_mode = "sudo "
class SerialComm:
def __init__(self):
self.port = serial.Serial("/dev/rfcomm0", baudrate=9600, timeout=1)
def read_serial(self):
res = self.port.read(50)
if len(res):
return res.splitlines()
else:
return []
def send_serial(self, text):
self.port.write(text)
def is_json(self, mJson):
try:
json_object = json.loads(mJson)
if isinstance(json_object, int):
return False
if len(json_object) == 0:
return False
except ValueError, e:
return False
return True
def isValidCommand(self, command, invalidCommand):
if command not in invalidCommand:
if re.match("^[a-zA-Z0-9. -]+$",command):
return True
return False
def readExecuteSend(self, shell, ble_comm, ble_line):
json_object = json.loads(ble_line)
ip_address = ble_comm.wifi_connect(json_object['SSID'], json_object['PWD'])
if ip_address == "<Not Set>":
print("Fail to connect to Internet")
#send back fail to configure wifi
callback_message = {'result': "FAIL", 'IP': ip_address}
callback_json = json.dumps(callback_message)
ble_comm.send_serial(callback_json)
return False
else:
#isConnected = True
print("connect to Internet! your ip_address: " + ip_address)
#send back configure wifi succesfully
callback_message = {'result': "SUCCESS", 'IP': ip_address}
callback_json = json.dumps(callback_message)
ble_comm.send_serial(callback_json)
return True
def wifi_connect(self, ssid, psk):
# write wifi config to file
f = open('wifi.conf', 'w')
f.write('country=US\n')
f.write('ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev\n')
f.write('update_config=1\n')
f.write('\n')
f.write('network={\n')
f.write(' ssid="' + ssid + '"\n')
f.write(' psk="' + psk + '"\n')
f.write('}\n')
f.close()
cmd = 'sudo mv wifi.conf ' + wpa_supplicant_conf
cmd_result = ""
cmd_result = os.system(cmd)
print cmd + " - " + str(cmd_result)
# restart wifi adapter
cmd = sudo_mode + 'ifdown wlan0'
cmd_result = os.system(cmd)
print cmd + " - " + str(cmd_result)
time.sleep(2)
cmd = sudo_mode + 'ifup wlan0'
cmd_result = os.system(cmd)
print cmd + " - " + str(cmd_result)
time.sleep(10)
cmd = 'iwconfig wlan0'
cmd_result = os.system(cmd)
print cmd + " - " + str(cmd_result)
cmd = 'ifconfig wlan0'
cmd_result = os.system(cmd)
print cmd + " - " + str(cmd_result)
p = subprocess.Popen(['ifconfig', 'wlan0'], stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = p.communicate()
ip_address = "<Not Set>"
for l in out.split('\n'):
if l.strip().startswith("inet addr:"):
ip_address = l.strip().split(' ')[1].split(':')[1]
return ip_address
class ShellWrapper:
def __init__(self):
self.ps = subprocess.Popen(['bash'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
def execute_command(self, command):
self.ps.stdin.write(command + "\n")
def get_output(self):
timeout = False
time_limit = .5
lines = []
while not timeout:
poll_result = select.select([self.ps.stdout, self.ps.stderr], [], [], time_limit)[0]
if len(poll_result):
for p in poll_result:
lines.append(p.readline())
else:
timeout = True
if(len(lines)):
return lines
else:
return None
def main():
shell = ShellWrapper()
invalidCommand = ['clear','head','sudo','nano','touch','vim']
ble_comm = None
isConnected = False
while True:
try:
ble_comm = SerialComm()
out = ble_comm.read_serial()
for ble_line in out:
print(out)
if ble_comm.is_json(ble_line):
if not isConnected:
isConnected = ble_comm.readExecuteSend(shell, ble_comm, ble_line)
break
else:
ble_comm.send_serial("Wifi has been configured")
break
if ble_comm.isValidCommand(ble_line, invalidCommand):
shell.execute_command(ble_line)
shell_out = shell.get_output()
if shell_out != None:
for l in shell_out:
print(l)
ble_comm.send_serial(l)
else:
ble_comm.send_serial("command '" + ble_line + "' return nothing ")
else:
ble_comm.send_serial("command '" + ble_line + "' not support ")
except serial.SerialException:
print("waiting for connection")
ble_comm = None
isConnected = False
time.sleep(1)
if __name__ == "__main__":
main()