ddvk-remarkable2-recovery/README.md

# reMarkable 2 Recovery / Unbricking

Tools for recovery (works only under Linux)

## [Parts and prerequisites](parts.md)

To put the rM2 in recovery, you will need:
- USB-C breakout board
- Pogo pin adapter to usb
    the pogo pins are as follows,  when viewed from the side, device facing up (VBUS is near the usb-c)
    `GND,ID,D+,D-,VBUS`

- [imx_usb_loader](https://github.com/boundarydevices/imx_usb_loader) a binary is included, but feel free to compile it

## Guide
* run `dmesg -w` on your host to monitor
* power off the device
* connect the USB-C breakout board
*   pull down **B8** (connect B8 over a 10K resistor to B12)
* connect the pogo pins to the tablet and to the host usb
* **make sure the connection is good, use a short good, different cable, etc**
* if the device does not start on its own, press the Power Button
* you should see a new device *USB HID v1.10 Device [Freescale SemiConductor Inc  SE Blank ULT1]*
* remove the pulldown resistor (disconnect B8)
* run `sudo ./imx_usb` or add the [udev](udev.md) rules to use it without `sudo`
* should see *USB Mass Storage device detected*
* should see a new mountable block device

## Next steps
* to recover the ssh password, mount the home partition `grep Developer <mountpoint>/root/.config/remarkable/xochitl.conf`
* TODO not tested, but something like `dd if=raw of=/dev/mountedroot1`

## What the setup looks like
![Pogo](https://i.imgur.com/yPymkBx.jpeg)
![USB-C Breakout](https://i.imgur.com/YqYELeg.jpeg)
![Connection](https://i.imgur.com/RGerZyp.jpeg)
![Connection with UART 1](rM2-Uart-1.jpg)
![Connection with UART 2](rM2-Uart-2.jpg)

## UART

UART6 TX is exposed via the pogo pins ID pin.

You can connect an FDTI chip (3V3) to ID pin to get UART at 115200 baud.

For more details checkout the wiki: https://remarkablewiki.com/tech/rm2_otg_pogo

For details building u-boot and Linux to support this checkout
[meta-freescale-3rdparty](https://github.com/Freescale/meta-freescale-3rdparty).