Diff: easy-connect/stm-spirit1-rf-driver/README.md

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+# Prototype RF Driver for STM Sub-1 GHz RF Expansion Boards based on the SPSGRF-868 Module for STM32 Nucleo #
+
+Currently supported boards:
+ * [X-NUCLEO-IDS01A4](http://www.st.com/content/st_com/en/products/ecosystems/stm32-open-development-environment/stm32-nucleo-expansion-boards/stm32-ode-connect-hw/x-nucleo-ids01a4.html)
+
+**Note**, in order to use expansion board `X-NUCLEO-IDS01A4` in mbed you need to perform the following HW modifications on the board:
+ * **Un**mount resistor `R4`
+ * **Mount** resistor `R7`
+ 
+Furthermore, on some Nucleo development boards (e.g. the [NUCLEO_F429ZI](https://developer.mbed.org/platforms/ST-Nucleo-F429ZI/)), in order to be able to use Ethernet together with these Sub-1 GHz RF expansion boards, you need to compile this driver with macro `SPIRIT1_SPI_MOSI=PB_5` defined, while the development board typically requires some HW modification as e.g. described [here](https://github.com/ARMmbed/sal-nanostack-driver-stm32-eth)! 
+
+This driver is used with 6LoWPAN stack.