Raspberry Pi 3 losing Wi-Fi connection frequently

Question

My Raspberry Pi 3 built-in Wi-Fi card has some serious problem. The Wi-Fi connection is lost very frequently (every 5-10 mins). I googled this problem and found some solutions to solve this:

• Turn off the power management of wlan card.

  sudo iw dev wlan0 set power_save off 
  

• Keep running this script using crontab

  /bin/ping -c2 -I $wlan $pingip >/dev/null 2>&1
  
  if [ $? -ge 1 ] ; then
      echo "Network connection down! Attempting reconnection."
      /sbin/ifdown $wlan  
      /bin/sleep 5
      /sbin/ifup --force $wlan 
  else
      echo "Network is Okay"
  fi
  

  I schedule the above script after every 10 min, but still losing connection. Wi-Fi works fine on smartphone and laptop.

What could be the possible reason and its solution?

Answer 1

I had the same problem (RPi's Wi-Fi had been working about 5 minutes after boot). And fixed it by switching Wi-Fi channel from 12th to 3rd on my HUAWEI router. (In North America 12,13,14 channels is low power Wikipedia WLAN channels)