Issue commands to TL-MR3020 using PuTTY (over serial or over WiFi) and configure it to mount external USB flash drive as rootfs.Issue commands to TL-MR3020 using PuTTY over Serial and configure it to connect to your WiFi router as client.
Disconnect the ethernet cable between TL-MR3020 and your laptop and connect a USB cable to the soldered USB-UART board to gain access to TL-MR3020's Serial console.Connect your TL-MR3020 to your laptop using Ethernet cable and flash the newly compiled image.While doing so, we will include the modules required for mounting flash drives and leave out the bulky modules like LuCI web interface that can be installed later on the rootfs which has been relocated to USB flash drive) Compile OpenWrt for TL-MR3020 on your ubuntu laptop.Install the toolchain for compiling OpenWRT on your 64-bit Ubuntu Laptop.Open up your TL-MR3020 and solder in a USB-UART (FT232RL) board to gain access to its serial port.So we have to resort to the following steps: In the latest version just about a few hundred kilobytes are left after flashing the image which aren't enough to install the modules required for mounting USB flash drives. My Weather Station used TL-MR3020 flashed with OpenWrt 12.09 and used this methods. In previous versions of OpenWRT, you had 840KB of space left on internal 4MB flash to install the essential kernel modules for usb, usb mass storage and ext4 which are all essential for mounting USB flash drive. My TL-MR3020 with FT232RL board to access its serial consoleĪnd a USB hub with a flash drive in one of its slots. Although it feats neatly within TL-MR3020's 4MB flash, doesn't leave enough space to install the modules required to shift the root file system to an external drive. The latest version of OpenWrt is quite bulky.
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