For example, I will update the firmware in the TP-Link TL-WR820N router.
1) Let’s see the revision of the router, in my case it is V1, and it was for it that I downloaded the archive with the new firmware from the official website. In my case, the latest firmware for V1 was TL-WR820N(RU)_V1_190905 (wr820rv1-ru-up_2019-09-05_12.42.43.bin).
Link for V1:
https://www.tp-link.com/ru-ua/support/download/tl-wr820n/v1/#Firmware
Link for V2:
https://www.tp-link.com/ru-ua/support/download/tl-wr820n/v2/#Firmware
If you download the firmware from the wrong revision, you can damage the router. Unpack the firmware file from the downloaded archive.
2) Open the router settings by typing the address http://192.168.0.1 in the browser and enter the login – admin, password – admin.
3) In the menu, select “System Tools” – “Firmware Update”, see which version is installed in the router, in my case it was written:
“Firmware version:1.0.2 Build 181011 Rel.57361n”
Press the “Browse” button and select the previously unpacked firmware file from the archive. Then press the “Update” button and wait until the firmware is loaded into the router and it will reboot.
Do not turn off the power of the router while updating.
After updating the firmware, the settings in the router were not reset.
i have tplink tlwr820n and v2 firmware , but for lan and wifi to stb android tvbox cannot multicast traffic , lag and buffer,to pc lan multicast trafic its normal,and when I compare it with totolink it smooth running multicast traffic wifi or lan to stb android tv and pc .. i tried downgrading firmware tplink tlwr820n to v1 and try v2 from tplink website, always apprears message cannot process error firmware when i clik proceed button