Pyreos ezPyro SMD User manual

Rev. 3.1
ezPyroTM Pyroelectric Infrared
Flame Detection Evaluation Kits
User Manual

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 2 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
CONTENTS
1INTRODUCTION ............................................................................................................................................ 3
2GETTING STARTED ........................................................................................................................................ 3
2.1 HARDWARE VARIATIONS ....................................................................................................................................................................................3
2.2 KIT CONTENTS .................................................................................................................................................................................................. 3
2.3 MINIMUM SYSTEM REQUIREMENTS .......................................................................................................................................................................3
3INSTALLATION .............................................................................................................................................. 4
3.1 INSTALL THE EZPYROTM SOFTWARE........................................................................................................................................................................ 4
4INSTALLING THE ST MICROCONTROLLER USB DRIVER .................................................................................... 4
5INSTALLING .NET 4.5 FRAMEWORK ............................................................................................................... 5
6CONNECT THE EZPYROTM EVALUATION KIT .................................................................................................... 5
7SOFTWARE USER GUIDE................................................................................................................................ 5
7.1 STARTING THE SOFTWARE ...................................................................................................................................................................................5
7.2 CONNECTING SOFTWARE TO THE EVALUATION KIT .................................................................................................................................................... 6
7.3 EZPYROTM SENSOR SETTINGS ...............................................................................................................................................................................7
7.4 SIGNAL VIEWING...............................................................................................................................................................................................9
7.5 FLAME DETECTION ALGORITHM ...........................................................................................................................................................................9
7.5.1 Additional Signal Viewing Features ............................................................................................................................... 9
7.5.2 Flame Algorithm Settings ............................................................................................................................................ 11
7.5.3 FFT Related Parameters Quick Guide .......................................................................................................................... 12
7.5.4 Threshold Ratio and Signal Multiplier Quick Guide ..................................................................................................... 13
7.6 KEY ADJUSTMENTS..........................................................................................................................................................................................15
7.7 MCU BASED ALGORITHM ................................................................................................................................................................................ 15
8SLEEP AND WAKE-UP .................................................................................................................................. 16
8.1 SLEEP MODE .................................................................................................................................................................................................16
8.2 WAKE UP PARAMETERS –THE WUP REGISTER..................................................................................................................................................... 16
9LOW POWER MODE.................................................................................................................................... 17
10 FFT RESOLUTION......................................................................................................................................... 17
11 ABOUT ....................................................................................................................................................... 18
12 FURTHER INFORMATION AND SUPPORT...................................................................................................... 18
Please note: the information contained in this document is subject to change without further notification.

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 3 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
1Introduction
This document describes the ezPyroTM Flame Detection Evaluation Kits and the related software for both kits. The
purpose of these kits is to enable engineers and technicians to carry out simple and effective evaluation of ezPyroTM
flame sensors, experiment with a sample Flame Detection algorithm, and to capture measured data to a PC.
The kits are based on the ST microelectronics STM32F303K8 microcontroller.
Please note: The software discussed in this document can only be used with the ezPyroTM Flame Detection Evaluation
Kits.
2Getting started
2.1 Hardware Variations
There are 2 variations of the hardware that can be used with the ezPyroTM Flame Detection software: the 4-sensor
SMD and the 3-sensor TO.
Figure 1: ezPyroTM SMD (left) and TO (right) Flame Detection Evaluation Kits
2.2 Kit contents
1. ezPyroTM - Prototype Flame Sensor Demonstrator Kit (SMD or TO)
2. Micro USB-to-USB cable
3. ezPyroTM Flame Detection software (Setup file included in software package)
4. USB drive with software and documentation
2.3 Minimum system requirements
1. Microsoft® Windows PC (all versions supported currently)
2. GB of RAM
3. 450 MB of available hard-disk space for installation, additional free space required for storing CSV files
4. 1024x768 display (1280 x 1024 recommended)
5. Local administrative rights to install device drivers
6. .NET Framework 4.5
7. 1 free USB port

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 4 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
3Installation
3.1 Install the ezPyroTM software
From the software pack included with the kit, select the “setup.exe” file that has this icon. This will start the
installation process.
Figure 2: Installer screen
Follow the on-screen instructions and enter the information required.
As part of the installation process a check will take place to see if .NET Framework 4.5 is present. If not, the setup
routine can be cancelled and the .NET framework 4.5 can be downloaded from Microsoft’s website.
A driver is needed for the STM32F303K8T6 microcontroller. This is included in the software package.
4Installing the ST Microcontroller USB Driver
The USB supplied contains a folder called “en.stsw-link009.zip”. Extract the files and run either the application
“dpinst_amd64.exe” if you have a 64bit system or “dpinst_x86.exe” if you have a 32-bit system. This will install the
USB driver for the ST microcontroller that is connected to the ezPyroTM board.
Once the driver has been installed the USB cable can be connected between the ezPyroTM Board and the computer.
Once connected the green light on the ezPyroTM board will be on constantly and the red light will flash (The
microcontroller is the inverse of this, red is on constantly and green flashes).

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 5 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
5Installing .NET 4.5 framework
If you do not have the .NET 4.5 framework installed on your computer, then use the installer provided
(“dotnetfx45_full_x86_x64”) in the software package.
6Connect the ezPyroTM Evaluation kit
Connect the USB cable to the kit and Windows PC.
You may see a message suggesting you are required to install a device driver. Follow the on-screen instructions and
download a driver from Windows Update or install from the software package provided.
7Software user guide
Please note: For further information on the functionality of the ezPyroTM sensors please consult the ezPyroTM Sensor
Reference Manual.
The ezPyroTM Flame Detection Evaluation software runs on Microsoft Windows PCs and communicates with the
ezPyroTM Evaluation Kit, which enables easy testing of ezPyroTM flame sensors. Additional signal processing and analysis
algorithms for Flame Detection are provided. These include a simple Flame Detection algorithm using Fast Fourier
Transform of sensor signals between a range of frequencies set by the user and ratio-based threshold for Flame
Detection.
7.1 Starting the software
Once installed to start the software find the application ezPyroTM Flame Evaluation in the start menu or on the
desktop. This will open the ezPyroTM sensor data capture main screen as shown in Figure 3
Figure 3: ezPyroTM Flame Detection software - main application window

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 6 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
7.2 Connecting software to the Evaluation Kit
To connect to the ezPyroTM Evaluation Kit, make sure the board is connected to the PC through the USB cable.
From the menu bar select the “Detector” option and then “Connect” as shown in Figure 4.
Figure 4: Evaluation Kit connection Figure 5: Com Port selection
This will open a further dialog box asking you to select which com port the data capture board is using, as shown in
Figure 4. Select the desired com port. If you are unsure which com port is assigned to your PCB, you can unplug the USB
cable and click “Refresh” which will remove the port assigned to your board from the list. You can then re-connect the
USB cable and when you click refresh the correct port will return to the list.
Figure 6: ezPyroTM SMD Flame Evaluation main window
If the data capture board is connected to the required com port, the status bar at the bottom of the main display will
show the message “Connected on COMXX” on the right side, and the left will show the Evaluation Kit firmware version.
The sensor signals will be visible on the signal viewers on the right.

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 7 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
If the program fails to make a connection to the data capture board, an error message is displayed, and the screen
returns to its initial screen. Check the USB connection and try to connect again.
When the TO version of the Flame Evaluation kit is connected the window changes to show three scopes and the status
bar now indicates that the TO firmware is running. See Figure 7.
The SMD and TO GUIs both provide the same functionality and work in the same way.
Sample Frequency (Hz): This label shows the calculated frequency of incoming data. The calculation is based on the
system timer of the computer, so its accuracy and stability are dependent on the computer being used.
7.3 ezPyroTM sensor settings
The settings of the ezPyroTM sensors within the kit can be accessed by selecting the “Show Settings” item in the
“Options” menu, as shown in Figure 8. The settings can only be changed when the software is successfully connected to
the Evaluation Kit.
Figure 8: Finding the Evaluation Kit settings
Figure 7: ezPyroTM TO Flame Evaluation main window

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 8 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
Figure 9: Evaluation Kit settings page
Sampling Period: Select how often to retrieve information to be displayed and used in the Flame Detection
algorithm. Make sure this is set so that the signal frequencies of interest are significantly smaller that the sampling
frequency. This is restricted in the ezPyroTM Flame Evaluation software so that the combination of sample rate and
power mode do not result in a sample frequency less than 60Hz as the FFT plots are set up to allow 0 to 30 Hz range.
For greater flexibility with the sample rate please use the ezPyroTM Evaluation Tool available on the standard USB
stick supplied with all Evaluation kits. The ezPyroTM Evaluation Tool will provide raw data recording only.
Gain Settings: The gain for the amplifier is set by selecting a capacitor to be used in the charge amplifier inside the
ezPyroTM package. The gain is proportional to 1/Capacitance but has been normalized with respect to minimum gain
value on the settings screen.
High Pass: The high-pass filter allows signal filtering within the ezPyroTM package before transmitting data to the MCU.
Low pass: The low-pass filter allows signal filtering within the ezPyroTM package before transmitting data to the MCU.
Transimpedance: The transimpedance setting is used to set the resistance of the feedback resistor in the gain
amplifier. It works together with the capacitance value chosen to set the time constant of the gain amplifier through
the RC response of the two parameters.

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 9 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
7.4 Signal viewing
After connection, raw signals from the sensors will be shown in the signal viewers on the right side of the software
window, as shown in Figure 10.
Figure 10: Raw signal view
7.5 Flame Detection Algorithm
For any operation beyond raw signal viewing, the Flame Detection algorithm needs to be enabled by selecting
“Algorithm: Enabled” under “Flame Algorithm Settings” on the main screen.
7.5.1 Additional Signal Viewing Features
The additional features which will be enabled with the algorithm are:
Fourier Transform –frequency domain representation of the signal - useful for looking at dominant
frequencies in signals (relative magnitude), for example comparison of flame flicker frequency and
human motion frequency.
A bar plot is used to represent the frequency bins. The term bins is used to indicate the grouping of a range of signals
into a single value stored in an element, the range grouped together is determined by the resolution of the FFT
produced by the Fourier transform. These are shown by selecting the Fourier transform shown in Figure 11.

ezPyroTM Flame Detection Evaluation Kit User Manual
Page 10 of 18 © Copyright Pyreos Ltd. 2020 ezPyroTM User Manual Rev. 3.1
Figure 11: Selecting Fourier Transform View
Selecting the above option will provide the user with the following signal views of each channel.
Figure 12: Fourier Transform Bar Plot
The y-axis slider allows for the scale of the bar plot to be change. This allows different signal levels to be visualised
proportionally next to each other.
Freq sum –This is the value acquired by summing the frequency bins set by the user, shown with red
columns in Figure 12. These are the values produced prior to the signal multipliers in section 7.5.4 so the
effect of the signal multipliers will not appear on this view.
Figure 13: Frequency Summation View
Algorithm Signal Strengths –This view is the bar plot that is always visible when the algorithm is
enabled. This contains the signal levels being compared by the algorithm.