Reference Manual

1. Introduction
The Calypso WLAN module is a compact WLAN radio module based on IEEE 802.11 b/g/n
with a fully featured TCP/IP stack. The edge castellated connections, smart antenna config-
uration and an easy-to-use AT-style command interface enables easy integration of Calypso
into any embedded application.
The module supports IPv4 as well as IPv6 and implements several commonly used network
applications like SNTP, DHPv4, DHCPv6, mDNS, HTTP(S), MQTT out-of the box. Advanced
security features like up to 6 simultaneous secure sockets, secure boot, secure storage and
secure OTA update provide a good basis for a secure end product.
Whether a serial cable replacement or low power IoT application with cloud connectivity, the
Calypso WLAN modules offers a robust and standard compliant wireless connectivity solu-
tion for low-power and low-medium throughput applications.
WLAN will be used as a synonym for IEEE 802.11 standard compliant radio communication
throughout this manual.
Calypso is Wi-Fi Certified. The Certification ID is WFA81685.
1.1. Operational description
The Calypso WLAN module is intended to be used as a radio sub-system in order to provide
WLAN communication capabilities to the system.
The UART acts as the primary interface between the module and a host micro-controller.
The module can be fully configured and operated using a set of AT-commands over UART.
Once configured, the module independently manages WLAN connectivity allowing the host
controller to utilize its resources elsewhere.
Therefore, when using the standard firmware, a host MCU is required in the end product to
control and access the radio module. Stand alone applications, without host, can be realized
with a custom firmware development.
Calypso reference manual version 1.2 © April 2019
www.we-online.com/wireless-connectivity 9