Reference Manual

4. Quick start guide
The Calypso WLAN module comes pre-flashed, tested and ready-to-use out-of-the-box.
This chapter describes steps to quickly build a prototype system and test the capabilities
of the module.
4.1. Antenna connection
Calypso ’s smart antenna configuration enables the user to choose between two antenna
options:
4.1.1. On-board PCB antenna
The Calypso has an on-board PCB antenna optimzed for operation in the 2.4 GHz band. A
simple short between the pins RF and ANT feeds the RF output of the module to the on-
board antenna. In this configuration, the module does not require any additional RF circuitry.
4.1.2. External antenna
For applications that use an external antenna, the Calypso provides a 50Ω RF signal on
pin RF of the module. In this configuration, pin ANT of the module has to be connected to
ground and pin RF to the external antenna via 50Ω feed line. Refer to chapter 16 for further
information.
4.2. Minimal pin configuration
The following pins must be connected as described in table 11 for correct operation. The
remaining can be left unconnceted.
Pin Number Pin Function Pin connection
1 ANT Connect to pin 2 or GND (see 4.1 )
2 RF Connect to pin 1 or external antenna (see 4.1 )
3,13,14,22,23,34 GND GND
4 VCC VCC
7 /RESET Host GPIO and/or reset button
5,6 STATUS_IND_x Optionally to Host GPIO for status indication
9 BOOT Boot pin to host GPIO or GND
10,11 APP_MODE_x Host GPIO for mode selection
15 UTXD Host UART RX
16 URXD Host UART TX
18 WAKE_UP Host GPIO for wake up trigger
Table 11: Minimal pin configuration
Calypso reference manual version 1.2 © April 2019
www.we-online.com/wireless-connectivity 20