Merge pull request #284 from arduino/karlsoderby/add-wifi-freq-iot-cloud

IoT Cloud frequency band support [MKC-490]

Author: karlsoderby

content/cloud/iot-cloud/tutorials/01.iot-cloud-getting-started/iot-cloud-getting-started.md

@@ -49,6 +49,8 @@ To use the Arduino IoT Cloud, a **cloud compatible board** is required. You can
 
 ### Wi-Fi
 
+***Official Arduino boards only supports the 2.4GHz frequency band for transmitting data.***
+
 The following boards connect to the Arduino IoT Cloud via Wi-Fi.
 
 - [MKR 1000 WiFi](https://store.arduino.cc/arduino-mkr1000-wifi)

content/cloud/iot-cloud/tutorials/02.technical-reference/iot-cloud-tech-ref.md

@@ -17,6 +17,8 @@ To use the Arduino IoT Cloud, a **cloud compatible board** is required. You can
 
 ### Wi-Fi
 
+***Official Arduino boards only supports the 2.4GHz frequency band for transmitting data.***
+
 The following boards connect to the Arduino IoT Cloud via Wi-Fi.
 
 - [MKR 1000 WiFi](https://store.arduino.cc/arduino-mkr1000-wifi)