Model jcg_jhr-n926r

Flashing via TFTP

  • Download the factory firmware image offered above to your Computer.
  • Configure a computer with static IP /24 and a TFTP server. On Debian or Ubuntu you can use either the tftpd-hpa or tftpd server packages.
  • Rename the downloaded firmware image to `` and place it in the tftp server’s root directory. (If using tftpd-hpa this is /var/lib/tftpboot/; if tftpd, it is /srv/tftp/) You can test that the file is downloadable with tftp localhost and get .
  • Connect the computer to one of the router’s Ethernet ports while the router is off. Press and keep pressed the router’s reset button and power it up. After about 7-10 seconds release the reset button. The power LED will flicker rapidly for ~3 seconds, indicating download of the firmware file.
  • The router will write the firmware to flash during ~40 more seconds of occasional power LED blinks, and then will reboot by itself, ready for use.

Flash layout

Region Label
0x40000-0x10000 factory
0x50000-0x3b0000 firmware
0x0-0x30000 u-boot
0x30000-0x10000 u-boot-env

Comments

General

2 digit 7-segment LED display, connected through two daisy-chained 74164 shift registers that are controlled by 3 GPIOs (data, clock, blank).

JCG JHR-N926R
Latest release 18.06.1 Discontinued
Device Type WiFi Router
Vendor JCG
Model JHR-N926R
Flash 4 MB warning
RAM 32 MB
CPU Ralink RT3052F (ramips)
1 x 384MHz
Ethernet ports 0 x GBit — 5 x 100Mbit
WiFi

2.4Ghz: b/g/n

Switch Ralink RT3052F
Bootloader U-Boot
Power Supply 12 VDC, 1.0 A
Serial check_circle
Additional resources