Ensure your power source will not be interrupted. Step-by-Step Firmware Upgrade Process
For advanced users, the stock TP-Link firmware might feel restrictive. The TL-MR3420 V5 hardware supports OpenWrt, an open-source alternative operating system.
Go to Advanced > System Tools > Firmware Upgrade . tp-link mr3420 v5 firmware
Press the reset button, power on the router, and keep the button pressed for 6-7 seconds until the router starts downloading the file. 5. Troubleshooting Firmware Issues
If the power LED blinks continuously and the router refuses to boot up after an update, the firmware may be corrupted. Ensure your power source will not be interrupted
Install custom firewalls, ad-blockers (like AdGuard Home/Simple AdBlock), and bandwidth monitors.
Have you bricked your v5 or successfully flashed OpenWRT? Drop a comment below. Let’s help each other keep this cheap, rugged router out of the landfill. Go to Advanced > System Tools > Firmware Upgrade
Click "Upgrade" and wait for the process to complete. Do not power off the router. 4. Upgrading to OpenWrt Firmware for MR3420 V5
Adds support for newer 4G LTE USB dongles.