U boot tftp6/18/2023 Also, powering up directly (as opposed to "rebooting" from a fully booted OpenWRT session) into U-boot may or may not help - it's worth a try. ![]() At any rate, just DON'T CONNECT SHIELDING AT ALL. In my case, even though it was a only 10cm "cable" between the module and the laptop I was trying to configure it with, apparently -NOT- connecting the "device GND" to the RJ45 connector's shielding pins made all the difference (granted, I used a "common mode choke -> transformer / transformer -> common mode choke" magjack instead of the more common "common mode choke -> transformer / common mode choke -> transformer" configuration simply because that's what I had at hand). try to make your physical Ethernet connection as lossless as possible. Now, here's what you can do about all of this: U-boot will ABORT THE TFTP TRANSFER after 10 errors TOTAL (not sequential errors - total errors!) ![]() Current TFTP servers DO NOT honour lost packets with a retransmission due to a problem called the " Sorcerer's Apprentice Syndrome" The "hacked up" Ethernet connection, even if really, really short, might have significant UDP packet loss There are three factors contributing to this failure (if you have the same problem) - any of them harmless on its own but fatal when compounded: The result? Failure with "Retry count exceeded". ![]() So far so good, but I never planned to have a physical RJ45 Ethernet jack on the module, so I had to hack one up with what I had at hand, then tried to use U-boot to flash the latest. bin image because the one it was shipped with had the memory partition sizes wrong making it useless. It's busy doing other stuff) after copious amounts of fumbling about not understanding why it wouldn't remember any setting at all I finally realized I needed to update it to the latest OpenWRT. That said, I recently purchased an RT5350F module, to use as a stand-alone OpenWRT server (I DO have a router. Okay, first off? The registration / posting "captcha" is juuust insidious - frankly I couldn't care less how many cores the RK3188 may or may not have - IT'S NOT WHAT I CAME HERE FOR.
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