![]() ![]() Here’s the pinout I guided myself by SchematicĪnd what my connector looked like after soldering it on the router board. I went with the latter, since by looking closely at the PCB pins 4,6,8 and 10 are obviously hard-wired to GND. These components include xtensa-esp32-elf-gdb debugger, OpenOCD on chip debugger, and the JTAG adapter connected to ESP32 target. ![]() Easy setting of mode pins for RX family products. Some tutorials used pin 12 for GND, while others forbid it (and used pins 4,6,8,10 instead). No need to select detailed type names for products of the RL78 family. But Linksys routers should all have the same layout, right? – wrong! On the WRT54GL v1.1 the JP1 12pin connector is the JTAG one, while the JP2 10pin can be used for the serial ports (if you want to do that mod too).Īfter discovering which connector is the right one, I had to find out the pinout. ![]() Some tutorials (mostly those written for WRT54G routers) used a 10 pin connector for the JTAG cable, others used the 12pin one. JP1 is a 12pin connector, while JP2 has 10 pins. The router has two unused connectors on the board, named JP1 and JP2. This was the trickiest part for me, mostly because I found plenty contradicting information on the internet. I tried the 30/30/30 reset, tried TFTP recovery – nothing worked.Īs it had the original Linksys firmware, at this point it was either a hardware failure or the only recovery course would be the JTAG reflash. I got a Linksys WRT54GL v1.1 router that somewhat worked and somewhat didn’t: it booted alright (no led errors), responded to ping on its default IP (192.168.1.1), bot other than that, it did not respond on the web interface, nor telnet/ssh, nor dhcp.
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