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Renate · 07-09-2022, 01:44 PM

Do you solder? Do you have some electronic junk?
Can you find a 300-1000 ohm resistor and solder some wires to it so that you could use it?
If you find a resistor, you can try doing a reset with the resistor between the 1.8V and 0V in the middle. If you have enough hands/test clips you can see when you use the resistor whether the 1.8V goes down or the 0V goes up. (The 0V should go up to 1.8V)
(You can do that measurement without doing the reset. Of course you need to do the reset to actually see if it will work.)

Have you already checked if an EDL cable works? I've never had any luck, but maybe if your Nova Air does not have analog audio over Type C it could work.

I presume that you don't have an oscilloscope.
A USB UART would be great, but you need a 1.8V one, not the typical 3.3V one.
If you do decide that you want one, this looks pretty good:
https://www.amazon.com/jim-sh-Micro1.../dp/B076B9YRMP
I'm not guaranteeing that we're going to find the hardware console and that you can use the UART.

If we can't find the EDL point, we're going to have to try to prevent the SoC from reading the flash so that it throws up its hands and goes to EDL. I've gotten my Moto E6 to EDL that way.

Edit: Actually, this is kind of cuter and works on 4 different voltage levels.
https://www.amazon.com/DSD-TECH-SH-U...dp/B07WX2DSVB/
Don't buy anything with Prolific 2303 in it. Buy from reputable supplier of FTDI.

07-09-2022, 01:44 PM	#14
Renate Onyx-maniac Posts: 3,974 Karma: 18026955 Join Date: Feb 2012 Device: Nook NST, Glow2, 3, 4, '21, Kobo Aura2, Poke3, Poke5, Go6	Do you solder? Do you have some electronic junk? Can you find a 300-1000 ohm resistor and solder some wires to it so that you could use it? If you find a resistor, you can try doing a reset with the resistor between the 1.8V and 0V in the middle. If you have enough hands/test clips you can see when you use the resistor whether the 1.8V goes down or the 0V goes up. (The 0V should go up to 1.8V) (You can do that measurement without doing the reset. Of course you need to do the reset to actually see if it will work.) Have you already checked if an EDL cable works? I've never had any luck, but maybe if your Nova Air does not have analog audio over Type C it could work. I presume that you don't have an oscilloscope. A USB UART would be great, but you need a 1.8V one, not the typical 3.3V one. If you do decide that you want one, this looks pretty good: https://www.amazon.com/jim-sh-Micro1.../dp/B076B9YRMP I'm not guaranteeing that we're going to find the hardware console and that you can use the UART. If we can't find the EDL point, we're going to have to try to prevent the SoC from reading the flash so that it throws up its hands and goes to EDL. I've gotten my Moto E6 to EDL that way. Edit: Actually, this is kind of cuter and works on 4 different voltage levels. https://www.amazon.com/DSD-TECH-SH-U...dp/B07WX2DSVB/ Don't buy anything with Prolific 2303 in it. Buy from reputable supplier of FTDI. Last edited by Renate; 07-09-2022 at 01:56 PM.