This repo aims to provide information about the TP-Link Archer D20 Modem Router. The stock firmware runs a version of OpenWRT with kernel version 2.6
The UART pins on the board are not clearly labeled. Use this image as reference.
Use the following table to connect to a UART adapter
| Router | UART Adapter |
|---|---|
| TX | RX |
| RX | TX |
| GND | GND |
| VCC | DONT CONNECT |
When the router is initially booting, it will tell you to press any key to stop autoboot.
However, what you actually need to do is press t in order to get to the console.
A successful entry into the console should look like this.
ROM VER: 1.1.0
CFG 05
ROM VER: 1.1.0
CFG 05
DDR autotuning Rev 1.0
DDR size from 0xa0000000 - 0xa3ffffff
DDR check ok... start booting...
U-Boot 2010.06-LANTIQ-v-2.2.67 (Jan 26 2016 - 10:15:11)
CLOCK CPU 500M RAM 250M
16 Bit RAM
DRAM: 64 MiB
Using default environment
In: serial
Out: serial
Err: serial
Net: internal phy using 25Mhz clock
Internal phy firmware version: 0xc434
ar10 Switch8192 KiB MX25L6405D at 0:0 is now current device
MAC: 00-00-5e-00-53-af
Type "run flash_nfs" to mount root filesystem over NFS
Hit any key to stop autoboot: 0
AR10 #