[MTCD  Android Head Units Q&A] scorillo_ro:
I will try Androidtool next days. I have a KLD (Klyde) unit, is not a GS and that's for sure.

I don't know if that matters or if it can be considered a mod, but at my previous attempts to recover my bricked 2GB SOM I lifted pins 27 and 28 of the USB HUB chip. But they are soldered back now and no other modifications were made. Actually this is how I found the connector... I traced the pins 27 and 28 using a multimeter by measuring all the unused pins on the back of the unit.

My new 4GB SOM has arrived so the OTG tests I made were done using this SOM. I still can't access my bricked 2GB SOM.

I am still using my old MTCB unit in my car because I have a new problem now on which I am focused: I don't have WiFi anymore :(

My KLD MCU has a Realtek 8188 Adapter, but android is expecting a 8723 one ...

[ 2.370745] [0: swapper/0: 1] [WLAN_RFKILL]: Enter rfkill_wlan_init
[ 2.371090] [0: swapper/0: 1] [WLAN_RFKILL]: Enter rfkill_wlan_probe
[ 2.371178] [0: swapper/0: 1] [WLAN_RFKILL]: wlan_platdata_parse_dt: wifi_chip_type = rtl8723bu
[ 2.371193] [0: swapper/0: 1] [WLAN_RFKILL]: wlan_platdata_parse_dt: enable wifi power control.
[ 2.371208] [0: swapper/0: 1] [WLAN_RFKILL]: wlan_platdata_parse_dt: disable wifi io reference voltage control.
[ 2.371222] [0: swapper/0: 1] [WLAN_RFKILL]: wlan_platdata_parse_dt: wifi power controled by gpio.
[ 2.371284] [0: swapper/0: 1] of_get_named_gpio_flags exited with status 29
[ 2.371297] [0: swapper/0: 1] [WLAN_RFKILL]: wlan_platdata_parse_dt: get property: WIFI,poweren_gpio = 29, flags = 0.
[ 2.371311] [0: swapper/0: 1] of_get_named_gpio_flags: can't parse gpios property
[ 2.371323] [0: swapper/0: 1] of_get_named_gpio_flags: can't parse gpios property
[ 2.371335] [0: swapper/0: 1] [WLAN_RFKILL]: rfkill_wlan_probe: init gpio
[ 2.371351] [0: swapper/0: 1] _gpio_request: gpio-29 (wlan_default_wlan_poweren) status -16
[ 2.371362] [0: swapper/0: 1] [WLAN_RFKILL]: Failed to get wlan_default_wlan_poweren gpio.
[ 2.371386] [0: swapper/0: 1] wlan-platdata: probe of wireless-wlan.25 failed with error -1

...

[ 2.747627] [0: khubd: 64] --mtc ann 1-1 0bda
[ 2.747659] [0: khubd: 64] usb 1-1: New USB device found, idVendor=0bda, idProduct=8176
[ 2.747676] [0: khubd: 64] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2.747684] [1: mkswap: 198] Buffer I/O error on device zram0, logical block 130227
[ 2.747697] [1: mkswap: 198] Buffer I/O error on device zram0, logical block 130227
[ 2.747711] [1: mkswap: 198] Buffer I/O error on device zram0, logical block 130227
[ 2.747733] [0: khubd: 64] usb 1-1: Product: 802.11n WLAN Adapter
[ 2.747740] [1: mkswap: 198] Buffer I/O error on device zram0, logical block 130227
[ 2.747752] [1: mkswap: 198] Buffer I/O error on device zram0, logical block 130227
[ 2.747764] [1: mkswap: 198] Buffer I/O error on device zram0, logical block 130227
[ 2.747806] [0: khubd: 64] usb 1-1: Manufacturer: Realtek
[ 2.747840] [0: khubd: 64] usb 1-1: SerialNumber: 00e04c000001

I don't know how to resolve this issue, so I ordered this just in case I need to physically replace it...

https://www.aliexpress.com/item/F23...module-tablet-wifi-bt-module/32657946183.html