Fixing Wireless on HP 15 laptop for Realtek RTL8723BE
If you're experiencing low signal for you wifi, and no connection at all, you might try to do this (valid for Ubuntu or Ubuntu related flavours):
# apt-add-repository ppa:hanipouspilot/rtlwifi
# apt-get update
# apt-get install rtlwifi-new-dkms linux-firmware
After this, create a new file in /etc/modprobe.d folder called let's say, rtl8723be.conf
options rtl8723be ant_sel=1
Restart and the signal should improve.
You can check it with:
iwlist scan | egrep 'SSID|level'
Compilation directly from sources is also possible, with the code from here.