Category Archives: Network


The unit of the RF signal. dB and dBm

When you are viewing RF-related documentation or logs, you often see a unit called dB and dBm. In fact, I did not use them differently until now. But I find that there are different meanings. Received Signal Strength Indicator: -49dBm The above shows the signal strength of Wi-Fi as part of the log when you… Read More »

wpa_supplicant build/compile on Ubuntu

When you are studying IEEE802.11, Wi-Fi on linux, you often need to look at the wpa_supplicant code. To study wpa_supplicant, you have to insert log into wpa_supplicant code, change the contents of the code, and try a lot. To do this, you must ensure that your code is working properly when you build the base… Read More »