The ON Semiconductor SigFox API development kit is an innovation that allows designers to quickly develop SigFox connected applications in the RCZ3 region using the AX-SFJK-API SoC solution. The DVK comes with a free two-year SigFox subscription, pre-programmed with the SigFox stack and an example application that can also be extended. It has approximately 40kB of flash available for application code. To program the DVK, the designer needs to download the development tools and the API software library. The commercially available IAR 8051 compiler is also required and the documentation for an example application is included in the API software library. This is consists of 1 mini-module with AX−SFZ and SMA connector, 1 debugger interface with ribbon cable, 1 mini-USB cable, 1 SMA antenna. It is a Pb free development kit.