I'd like my Python script to check if it's online of not. Found pretty many answers here on Stack Overflow, but all failed for some weird reasons. The scenario: a Raspberry Pi 3b+ connected to my router through Wifi. That said router is connected to internet through its cable I wish to determine if the Raspberry has internet connection or not in order to change it's data source if needed. After searching here for the day, I found that the majority of the solutions use, for the better one, sockets, and for the worst ones (still tried to see if it changes anything, but no) urllib.urlopen. Here's what I try: def checkOnlineState(self, addr='http://www.google.com'): try: urllib2.urlopen(addr, timeout=2) if not self._onlineMode: print('Internet connection is back!') self._onlineMode = True return except: pass if self._onlineMode: print('I lost internet connection') self._onlineMode = False I also tried with sockets, so instead of urllib2.urlopen I used socket.create_connection((addr, 80), timeout=2) or socket.create_connection(('8.8.8.8', 0), timeout=2) Whatever I do, except for entering a malformed ip or url, says I'm online. How do I know it? Well, the checkOnlineState runs in a loop, and if I take the internet cable off, the Raspberry still states it's online! Continue reading...
