STEVAL-FKI868V1 with NUCLEO-L152RE board.

Can be used “normally” or via mbed.

ST Page: http://www.st.com/en/evaluation-tools/steval-fki868v1.html

Sigfox page: https://partners.sigfox.com/products/steval-fki868v1

Schematics in the datasheet or here: http://www.st.com/resource/en/schematic_pack/steval-fki868v1_schematic.pdf

S2-LP ULP transceiver page: http://www.st.com/en/wireless-connectivity/s2-lp.html

STMicro Wireless Connectivity for IoT Applications Brochure: http://www.st.com/resource/en/brochure/brwireless_web.pdf

! many thanks to STMicroelectronics