README update

README.md

@@ -1,3 +1,13 @@
+# Wideband
+
+This fork is for development of FW for [RusEFI](https://github.com/rusefi) [dual channel wideband](https://github.com/rusefi/rusefi-hardware/tree/main/lambda-x2). Based on [initial desing](https://github.com/mck1117/wideband) from [mck1117](https://github.com/mck1117)
+
+For stm32f042 FW please refer to original repo. While I try to keep it buildable and unaffected by my modification I can not quaranty its functionality and provide any support.
+
+[OpenBLT](https://github.com/feaser/openblt) bootloader is used for FW update functionality. Please reffer to original [documentation](https://www.feaser.com/openblt/doku.php?id=faq) on how to compile host tools and use it.
+
+# Original readme
+
 [![Build Firmware](https://github.com/mck1117/wideband/actions/workflows/build-firmware.yaml/badge.svg)](https://github.com/mck1117/wideband/actions/workflows/build-firmware.yaml) ![license](https://img.shields.io/github/license/mck1117/wideband)
 
 # rusEFI Wideband Controller