I have a Xiaomi mi 4C router laying around. Ive upgraded to a new router coz I had troubles with MI 4C.
That router has a very small and unstable range. I installed openwrt and I noticed that I cant set Wireless transmit power above 14dBm. Usually any cheap common router will have around 20dBm but why is that just 14dBm?
I tried changing to many regions but still couldnt find anything more than 14dBm.
I tried Xwrt, Padavan but its the same. Transmission power is very low. How can I improve this? Like I want it 18 or 20 dBm.
4C is a lowest cost router in Xiaomi, only one SOC chip, no external RF power Amp, no external LNA, even no external RAM chip, but still near full software functions (no USB port). US$10~20 for a new one.
Please do not expect it can do everything.