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After we found the TX pin in previous blog post and can have a look at the console messages, we can continue to look for the RX pin. The RX pin is still unknown, but we couldn't test for it, as serial logins are prohibited on the Home Base. Luckily the Home Base firmware files are released under GPL, this allows me to have a peek around in the code and look for the protection. After that I could compile a custom firmware without the protection. Compiling of the firmware is beyond the subject of this blog post, but it's not that complicated if you follow Belkin's guidelines. Please note that flashing custom firmware's can wreck your device! I am pretty confident of doing this, I have done it several times in the past with other devices. Another reason which makes me just do it, is that I have serial console access. So, there must be some way to unbrick this device. (more…)