TP-Link TL-WR902AC v3

TP-Link TL-WR902AC v3 is a pocket-size dual-band (AC750) router based on MediaTek MT7628N + MT7650E.

ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
TL-WR902ACv3MediaTek MT7628AN580864MediaTek MT7628AN, MediaTek MT7610ENb/g/na/n/ac1--1x 2.0

The only way to flash OpenWrt image in TL-WR902AC v3 is to use tftp recovery mode in U-Boot:

  1. Configure PC with static IP 192.168.0.66/24 and tftp server.
  2. Rename openwrt-ramips-mt76x8-tplink_tl-wr902ac-v3-squashfs-tftp-recovery.bin to tp_recovery.bin and place it in tftp server directory.
  3. Connect PC with the LAN port, press the reset button, power up the router and keep button pressed for around 6-7 seconds, until device starts downloading the file.
  4. Router will download file from server, write it to flash and reboot.

The whole procedure- https://www.youtube.com/watch?v=LIM_2BLi91M&t=47s

The device has an internal step down converter that is able to tolerate up to 6.5V. It is advised to keep a little safety margin. With the device fully powered up, wifi connected, ethernet unplugged, the power usage is ~1.2 watts. With a little wifi usage, power draw stays slightly below 2 watts.

The USB port power is directly connected to the micro usb socket.

The device works reliably with an input voltage of 3.3 volts, it crashes reliably at ~2.9 volts.

Together with a USB LTE stick, the idle power usage is jumping between 1.5 and 2.5 watts, whereby little data transfer keeps it at 2.5-3 watts.

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  • Last modified: 2020/07/08 03:57
  • by arkduke