OverviewAll product unitsProduct unitWireless Connectivity & SensorsProduct groupRadio ModulesProduct familyBluetooth® & Wi-FiProduct sub-familyWi-FiProduct seriesCalypso WiFi FeatherWing

Calypso WiFi FeatherWing


  • 2.4 GHz WiFi connection IEEE 802.11 b/g/n
  • Easy connect to smart devices and servers
  • Handling multiple nodes simultaneously
  • Energy saving mode to support battery powered applications
  • Supports IPv4 and IPv6
  • Out-of the box implementation of several commonly used network applications like SNTP, DHPv4, DHCPv6, mDNS, HTTP(S), MQTT
  • Direct communication to the cloud
  • In Adafruit Feather form-factor
  • Easy to expand with our WE FeatherWings and hundreds of already existing boards with the Feather form-factor


  • Rapid development of IoT applications
  • Easy to use platform for learning, experimenting and prototyping cloud connectivity applications
  • Collect sensor data, store it in a database and then visualize the data in graphs


Order Code Data­sheet Man­ual DownloadsDescription Offer
PDF2 files Calypso WiFi FeatherWing
Order Code Data­sheet
Order Code Data­sheet Man­ual DownloadsDescription Offer

Software Downloads

Wireless Connectivity SDK

The aim of the Wireless Connectivity Software Development Kit (SDK) is to minimize the effort required on customer side to enable his host MCU to communicate with Würth Elektronik eiSos radio modules. It contains the implementation of all available commands in pure C-code. In order to integrate any Würth Elektronik eiSos wireless module, the user has to simply port the corresponding C-code to his host processor. This significantly reduces the time needed for developing the software interface to the radio module.

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Calypso FOTA

Calypso Firmware Over The Air (FOTA) - This is the firmware update package for the Calypso Wi-Fi Module. The Calypso Wi-Fi Module offers secure over-the-air firmware updates to enable easy update of the firmware in the field. The update package includes the module firmware, service pack, root certificate catalogue and the files for the on-board Webserver. It is always recommended to use the latest version of the firmware. Please refer to the chapter on “Firmware Update” for instructions of updating the firmware on the Calypso Wi-Fi module.

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Stacking boards ideal for prototyping

WE FeatherWings

Würth Elektronik eiSos presents, a range of FeatherWing development boards that are open source and fully compatible with the Feather form factor. Through these development boards WE brings a range of wireless connectivity modules, sensors and power modules to the Feather ecosystem.

Adafruit Feather is a complete line of development boards from Adafruit and other developers that are both standalone and stackable. They're able to be powered by LiPo batteries for on-the-go use or by their micro-USB plugs for stationary projects.

Feathers are flexible, portable, and as light as their namesake.FeatherWings are stacking boards and add functionality and room for prototyping. At its core, the Adafruit Feather is a complete ecosystem of products - and the best way to get your project flying.

Supercharge your prototyping for easy and fast solution testing. Start by checking our quick start section.


Sensor FeatherWing (2501000201291)
  • Temperature
  • Humidity
  • Acceleration
  • Absolut Pressure
  • Sparfun QWIIC compatible to easily add hundreds of extension boards
Thyone-I Wireless Featherwing (2611059021001)
  • Wireless connection with up to 500 m
  • Integrated security/authentication IC
  • Easy set up of a mesh network
  • Connect to Thyone-I modules or USB-Sticks
Calypso Wi-Fi FeatherWing (2610039025001)
  • 2.4 GHz Wi-Fi-Connection
  • Easy connection to smart devices and server
  • Handling multiple nodes simultaniously
  • Direct communication to the cloud
MagI³C Power FeatherWing (2601157100001)
  • 5 V USB connection
  • Industrial input voltage rails of 9 V, 12 V, 15 V, 18 V and 24 V with maximum nominal input voltage of 36 V
Connect any FeatherWing Microcontroller
  • Request sensor data
  • Transfer data to RF-Module
  • Examples and Sourcecode available on Github

Application Examples

Example 1: Built a Proprietary Network
Example 2: Connect with Wi-Fi
Example 3: Send data with Wi-Fi

Example 1: Built a Proprietary Network

  • Select a microprocessor of your choice from the Adafruit Feather ecosystem
  • Use the Sensor FeatherWing for measuring condition parameters like temperature, air pressure, humidity and acceleration
  • Send data with the Thyone-I FeatherWing on 2.4 GHz proprietary radio
  • Thyone-I USB radio stick or another Thyone-I FeatherWing can receive the data and you get access to all information
  • Even various tags could be connected wirelessly
  • We support you with libraries and examples available on Github for some microcontrollers

Send data with the Calypso Wi-Fi FeatherWing on 2.4 GHz Wi-Fi

  • Select a microprocessor of your choice from the Adafruit Feather ecosystem
  • Use the Sensor FeatherWing for measuring condition parameters like temperature, air pressure, humidity and acceleration
  • Send data with the Calypso Wi-Fi FeatherWing on 2.4 GHz Wi-Fi
  • Receive data on smart devices or server structures

Another simple application example is described here with the combination of an Adafruit Feather M0 Express with our Sensor FeatherWing and Calypso Wi-Fi FeatherWing.

A typical IoT application consists of sensing the environment through sensors, collecting the sensor data and forwarding it to a cloud. The cloud platform then provides options for further processing and visualization of the data. In this example, the data is read from the sensors of the Sensor FeatherWing and forwarded to a cloud platform via the Calypso Wi-Fi FeatherWing.

Currently, the data can be sent to one of the following cloud platforms:

  • Microsoft Azure
  • Amazon AWS

Sample code and further documentation can be found on our Sensor2CloudConnectivity Github page.

4 sensors to measure environmental data:

  • Temperature
  • Humidity
  • Acceleration
  • Absolute Pressure

An Adafruit Feather M0 acts as managing director.

The Calypso Wi-Fi FeatherWing collects the sensor data and passes it on to any cloud.

More information

Extensive documentation, use cases and sample code can be found on our GitHub page.


Würth Elektronik Webinar: Discover Radio Communication


Würth Elektronik Webinar: Range of radio protocols and appropriate antennas in theory & practice


Würth Elektronik Webinar: Certification, Policies & Guidelines for wireless communication


Würth Elektronik practice-oriented webinar: RF modules design do’s and don’ts


Würth Elektronik Webinar: Making your industrial device IoT compatible with Wi-Fi