The CYW920819EVB-02 Evaluation Kit is a development board from Cypress based on the CYW20819 dual-mode Bluetooth 5.0 module. The board features Arduino-compatible headers for expanding its capabilities, and includes an onboard thermister and nine-axis motion sensor that consists of a 3D digital linear accelerometer, 3D digital angular rate sensor, and 3D digital magnetometer.

Project Specifics

CYW920819EVB-02 projects start with the following sensor elements imported from the Element Library:

MurataNCU15WF104F60RCElement icon for the element library

Murata NCU15WF104F60RC

STMicroelectronicsLSM9DS1Element icon for the element library


Hardware Specifics

Some devices may have limitations or design restrictions that cause unexpected behavior when used with Atmosphere. Specific information and details pertaining to the CYW920819EVB-02 and its performance on Atmosphere is noted below.

There are no known issues, unexpected behaviors, or hardware limitations while using the CYW920819EVB-02 with Atmosphere.

Default Pin Mapping

Atmosphere configures each peripheral to a default pin for every supported device, based on ideal pairing of pins and their usage. The default pin configuration is set for convenience and enables each peripheral to work naturally without needing to be modified.

CYW920819EVB-02 projects start with the following pin configuration:

Pin Description Notes
D0 Arduino Header D0 Maps to WICED_P37
D1 Arduino Header D1 Maps to WICED_P32
D2 Arduino Header D2 Maps to WICED_P00
D4 Arduino Header D4 Maps to WICED_P02
D5 Arduino Header D5 Maps to WICED_P03
D6 Arduino Header D6 Maps to WICED_P04
D7 Arduino Header D7 Maps to WICED_P05
D8 Arduino Header D8 Maps to WICED_P14
D10 Arduino Header D10 Maps to WICED_P15
D11 Arduino Header D11 Maps to WICED_P06
D12 Arduino Header D12 Maps to WICED_P17
D13 Arduino Header D13 Maps to WICED_P09
A0 Arduino Header A0 Maps to WICED_P13. Connected to thermistor.
A2 Arduino Header A2 Maps to WICED_P12
A4 Arduino Header A4 Maps to WICED_P10
A5 Arduino Header A5 Maps to WICED_P08
ADC_VDDIO VDDIO ADC Channel Doesn’t map to pin
LED1 User LED 1 Maps to WICED_P27
LED2 User LED 2 Maps to WICED_P26

The default pin for any peripheral can be changed within an element's properties, from an element that references that particular peripheral.


Below is information regarding the CYW920819EVB-02’s exposed peripherals.



This I2C bus is exposed via the SCL and SDA pin on the Arduino header.



This SPI bus is exposed via pins D11(MOSI), D12(MISO), and D13(CLK).


UART1 (USB Debug Console)

This UART is exposed via the micro-USB connector on the ESP32 or pins D1(TX) and D0(RX).


The following pins can be used for ADC input:

  • A0 - Must disconnect thermistor via J14 prior to use
  • A2
  • A4
  • A5


Any GPIO pin can be used for PWM output.

Programming Method

Programming the CYW920819EVB-02 involves using the programmer interface in Atmosphere Studio to install embedded firmware.

Setup Configuration

Prior to programming an CYW920819EVB-02, ensure you have the following setup configuration:

  • The CYW920819EVB-02 is connected to the computer via USB.
  • The computer has the necessary connectivity protocols enabled (Bluetooth Low Energy, Wi-Fi, etc.).
  • The Atmosphere IoT Agent is installed on the computer and running. This is a local application that runs in the system tray and acts as an intermediary between the computer’s connectivity protocol drivers and the browser running Atmosphere.
  • An Internet connection is maintained.
  • The project to be programmed has been compiled.
  • The CYW920819EVB-02 is in recovery mode.

Users working with the CYW920819EVB-02 on macOS need to download the Cypress ModusToolbox SDK in order to program. This doesn't need to be run or used, but downloads the necessary drivers needed to program the CYW920819EVB-02 on macOS.

CYW920819EVB-02 Recovery Mode

To put the CYW920819EVB-02 into recovery mode:

  1. Press and hold the reset button, then press and hold the recover button. Release the reset button, wait one second, then release the recover button.

There is no visual indication of the board going into recovery mode, but the board can now be programmed.

Programming Instructions

With setup complete, you can program the CYW920819EVB-02:

  1. From Atmosphere Studio’s Embedded tab, click the Program Firmware button from the tab’s toolbar. This displays the Program Firmware window.
  2. Under Device Port, select the communication port the device is connected to.
  3. Click Program to start programming. When complete, you’ll be notified that the device is programmed with the project’s embedded firmware.

When complete, the CYW920819EVB-02 reboots and is programmed with the project’s embedded firmware.

Guides and Tutorials

Get started using the CYW920819EVB-02 with Atmosphere by walking through the following guides:

CYW920819EVB-02 Guides
Getting Started with CYW20819

Demo Projects

Atmosphere includes a variety of CYW920819EVB-02 demo projects for users of all levels. Check them out by clicking the demo’s name to open the project in Atmosphere.

Name Description
CYW920819EVB Demo A basic demo that reads the temperature data from the CYW920819EVB-02, prints it on the mobile app, and sends it to the cloud.
LSM9DS1 Demo Demonstrates the LSM9DS1 nine-axis inertial sensor onboard the CYW920819EVB-02. Measures acceleration data and prints it in the debug console, and within the mobile app displays the acceleration values for the x-, y-, and z-axis.


The Atmosphere video library contains the following videos on the CYW920819EVB-02:

Getting started video coming soon!


The following additional resources and downloadable files are available for the CYW920819EVB-02: