Besides WIFI 2.4 GHz and 5.8 GHz WIFI also ZigBee, Bluetooth Low Energy and Classic Bluetooth is integrated. In addition, the controller in the module can be used for an individual application. As interfaces for peripherals are I2C, I2S, SPI, QSPI, UART, GPIO, JTAG and analogue I/O available.
Why I wrote the IoT M2M Cookbook
In my more than 20 years working with a manufacturer and in distribution I gave the same hints and recommendations to developers of wireless applications again and again. In May 2012 I made the decision to write the story that I have to tell weekly to customers in a book. The target is to guideline developers from the idea for an IoT / M2M device to a final product with mass production.