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TP-Link TL-WR840N Wireless Router Detailed Configuration Guide
This guide helps users install, configure, and maintain the TL‑WR840N wireless router. It covers hardware description, quick installation, and all configuration options such as WAN/LAN settings, wireless security, DHCP, and advanced routing features.
The document is organized into chapters on product overview, hardware layout, quick‑install procedures, detailed configuration guides, system tools, and appendices with FAQs, browser settings, MAC address lookup, and full specifications. This manual is written in Chinese.
TP-Link TL-WR840N specifications
| Supported wireless standards | IEEE 802.11b/g/n |
|---|---|
| LAN ports | 4 x 10/100Mbps auto‑MDI/MDIX RJ45 ports |
| WAN port | 1 x 10/100Mbps auto‑MDI/MDIX RJ45 port |
| Frequency range | 2.4 – 2.4835 GHz |
| Maximum data rate (802.11n) | up to 300 Mbps |
| Antennas | 2 dipole omnidirectional antennas |
| Transmit power | 20 dBm (max) |
| Dimensions (L×W×H) | 158 mm × 120 mm × 34 mm |
| Operating temperature | 0 °C to 40 °C |
| Storage temperature | -40 °C to 70 °C |
| Operating humidity | 10 % to 90 % RH (non‑condensing) |
| Storage humidity | 5 % to 90 % RH (non‑condensing) |
Source: TP-LINK TL-WR840N 11N Wireless broadband Router service manual
All TP-Link TL-WR840N documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Disassembly, diagnostics and part numbers, for repair.
Questions answered in these manuals
What can I do if the login window does not appear?
Change the computer's IP settings to obtain an IP address automatically, verify the URL, try a different browser, reboot the router, or disable and re-enable the network adapter.
From: TP-LINK TL-WR840N 300Mbps Wireless N Router Quick Installation Guide
What can I do if I cannot access the Internet?
Check if the Internet works by connecting directly to the modem, reboot the router (and modem for cable users), or clone the MAC address in the Web Management page.
From: TP-LINK TL-WR840N 300Mbps Wireless N Router Quick Installation Guide
How can I reset the TL‑WR840N to factory defaults?
Use the system tools section to select the “恢复出厂设置” (restore factory settings) option, which will reset all configuration to the original state.
From: TP-LINK TL-WR840N 11N Wireless broadband Router service manual
Where can I find the router’s MAC address?
The MAC address can be viewed via the “MAC 地址查询” (MAC address query) function in the system tools.
From: TP-LINK TL-WR840N 11N Wireless broadband Router service manual
Where can I find the MAC address of my computer?
Open the network connection details in Windows; the “Physical Address” shown (e.g., 00‑0A‑66‑EB‑54‑37) is the MAC address.
From: TP-Link TL-WR840N Wireless Router Detailed Configuration Guide
What wireless security modes does the TL‑WR840N support?
It supports 64/128/152‑bit WEP, WPA/WPA2, WPA‑PSK/WPA2‑PSK, and TKIP/AES encryption.
From: TP-Link TL-WR840N Wireless Router Detailed Configuration Guide