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README.md

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+# STM32WB55 boards
+
+## Board
+
+### Wireless stack update
+
+- download https://github.com/STMicroelectronics/STM32CubeWB
+- Use DFU mode: https://www.youtube.com/watch?v=wheGvdXsi4o @ 1min 47s
+  - Jumper at
+    - USB MCU
+    - CN7, Pin 5&7
+  - Connect with ST-Link, in STM32Programmer/Option bytes/User configuration/ set `nSWBOOT0` to true
+  - Switch USB to *user USB*
+  - Connect with USB
+- Update FUS: https://community.st.com/s/question/0D53W00000377Nq/pnucleo-wb55-fus-error-imagenotfound
+  - Select *First Install* checkbox
+- Download binary, for example `stm32wb5x_Zigbee_FFD_fw.bin`
+
+## Dongle
+
+Just update FUS and download binary