How to store output of hcitool lescan?

Question

I was trying to scan ble devices using hcitool lescan in a python code. The hcitool lescan works well on the command line but fails to return any output using subprocess.Popen.The code works fine when lescan is replaced with 'scan' ie scan of conventional bluetooth. My code is:

import os
import time
import subprocess 
proc = subprocess.Popen(['sudo','timeout', '20s','hcitool', 'lescan'],stdout=subprocess.PIPE)
proc.wait()
lines = proc.stdout.readlines()
print lines

where did you get the idea to call `.wait()` before `.readlines()`? — jfs, Jun 18 '16 at 23:25

score 0 · Answer 1 · answered Jun 16 '16 at 21:22

0

Have you tried to use communicate?

proc = subprocess.Popen(...)
stdout, stderr = proc.communicate()

answered Jun 16 '16 at 21:22

Hai Vu

37,849
11
66
93

score 0 · Answer 2 · answered Jun 18 '16 at 13:22

0

Use

from commands import getoutput as shell
s = shell('hcitool scan')

s is a string with what you are looking for.

answered Jun 18 '16 at 13:22

Julien Goupy

165
6

How to store output of hcitool lescan?

2 Answers2