# OpenIPC Wiki [Table of Content](../README.md) Sigmastar unbrick --- **Locate the Sigmastar UART output and connect it to the CH341A I2C:** - $\color{dimgray}{\texttt{GND -> GND (PIN 1-4)}}$ - $\color{deepskyblue}{\texttt{TX -> SDA I2C (PIN 5)}}$ - $\color{orange}{\texttt{RX -> SCL I2C (PIN 6)}}$ --- **Download snander-mstar:** - https://github.com/viktorxda/snander-mstar/releases --- **Check the device flash with snander:** - Power cycling might help if the device can not be detected. ``` snander -i -q ``` **Erase the boot partition:** ``` snander -l 0x200000 -e ``` **Write the new uboot file:** - https://github.com/OpenIPC/firmware/releases/tag/latest ``` snander -w u-boot-ssc338q-nand.bin ``` --- **I2C devices:** - 0x49 -> MStar ISP - 0x59 -> MStar Debug --- - [Alternative Raspberry method by MarioFPV](https://youtu.be/88C8UvyKQlQ)