import subprocess
[docs]
def scan(interface="wlan0"):
result = []
try:
r = subprocess.check_output(["iwlist", interface, "scan"], encoding='utf8')
mac = None
for line in r.split('\n'):
if "Address" in line:
# Based on the adapter eithere a percentage or dBm is returned
# Add previous network in case no dBm signal level was seen
if mac is not None:
result.append({"mac": mac})
mac = None
mac = line.split(' ')[-1]
elif "dBm" in line:
try:
level = line.split('Signal level=')[1]
rss = int(level.split(' ')[0])
result.append({"mac": mac, "rss": rss})
mac = None
except ValueError:
continue
# Add last network if no dBm was found
if mac is not None:
result.append({"mac": mac})
return result
except Exception:
return None