bluey-beacon - python

bluey-beacon-1.py

class BLEScanner:

    hcitool = None
    hcidump = None
    
    def start(self):
        print('Start receiving broadcasts')
        DEVNULL = subprocess.DEVNULL if sys.version_info > (3, 0) else open(os.devnull, 'wb')

        subprocess.call('sudo hciconfig hci0 reset', shell = True, stdout = DEVNULL)
        self.hcitool = subprocess.Popen(['sudo', '-n', 'hcitool', 'lescan', '--duplicates'], stdout = DEVNULL)
        self.hcidump = subprocess.Popen(['sudo', '-n', 'hcidump', '--raw'], stdout=subprocess.PIPE)

    def stop(self):
        print('Stop receiving broadcasts')
        subprocess.call(['sudo', 'kill', str(self.hcidump.pid), '-s', 'SIGINT'])
        subprocess.call(['sudo', '-n', 'kill', str(self.hcitool.pid), '-s', "SIGINT"])

    def get_lines(self):
        data = None
        try:
            print("reading hcidump...\n")
            #for line in hcidump.stdout:
            while True:
                line = self.hcidump.stdout.readline()
                line = line.decode()
                if line.startswith('> '):
                    yield data
                    data = line[2:].strip().replace(' ', '')
                elif line.startswith('< '):
                    data = None
                else:
                    if data:
                        data += line.strip().replace(' ', '')
        except KeyboardInterrupt as ex:
            print("kbi")
            return
        except Exception as ex:
            print(ex)
            return