Bosch BME280 User manual

BME280 User Manual
Document revision
1.0
Document release date
April 2023
Document number
BST-BME280-DSxxx-yy
Sales Part Number
0 273 141 185
Notes
Data and descriptions in this document are subject to change without notice. Product
photos and pictures are for illustration purposes only and may differ from the real
product appearance.
BME280
Desktop Development 2.1 User Manual

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Table of Contents
1 About user manual .........................................................................................................................................................4
1.1 Who should read this manual................................................................................................................................4
1.2 DD2.1 UI Overview................................................................................................................................................ 4
1.3 Sensor Communication: ........................................................................................................................................ 4
1.4 Graphical display: ..................................................................................................................................................4
1.5 Data logging: .........................................................................................................................................................4
2 About the BME280......................................................................................................................................................... 5
3 Getting Started ..............................................................................................................................................................6
3.1 Setting Up the board-PC connection.......................................................................................................................6
3.2 Upgrading Firmware ................................................................................................................................................9
3.2.1 For App 2.0 Board: ......................................................................................................................................... 9
3.2.2 For App 3.0 Board: ......................................................................................................................................10
4 Working with DD2.1 UI ................................................................................................................................................ 12
4.1 Sensor Data...........................................................................................................................................................12
4.1.1 Altitude..........................................................................................................................................................12
4.1.2 Relative Humidity .........................................................................................................................................12
4.1.3 Temperature ................................................................................................................................................. 12
4.2 Default View........................................................................................................................................................... 13
4.3 Memory Map..........................................................................................................................................................13
4.4 Sensor Mode .........................................................................................................................................................14
4.5 General Settings: ...................................................................................................................................................14
4.6 Reset Sensor .........................................................................................................................................................16
4.6.1 PO Reset ...................................................................................................................................................... 16
4.6.2 Soft Reset..................................................................................................................................................... 16
4.7 Data Export/ Log....................................................................................................................................................16
4.8 Register Access................................................................................................................................................... 17
4.9 Calibration ........................................................................................................................................................... 17
5General Troubleshooting............................................................................................................................................ 18
6Legal disclaimer ..........................................................................................................................................................21

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7Document history and modification.......................................................................................................................... 22
List of figures
Figure 1 : Insert sensor for APP2.0 ................................................................................................................................... 6
Figure 2 : Insert sensor for APP3.0 ................................................................................................................................... 6
Figure 3 : Connect board and PC for APP2.0 ................................................................................................................... 6
Figure 4 : Connect board and PC for APP3.0 ................................................................................................................... 7
Figure 5 : Connection complete for APP2.0 ...................................................................................................................... 7
Figure 6 : Connection complete for APP3.0 ...................................................................................................................... 7
Figure 7 :: DD2.1 UI Startup View ..................................................................................................................................... 8
Figure 8 : Communication Status ...................................................................................................................................... 8
Figure 9 : Firmware upgrade window ................................................................................................................................ 9
Figure 10 : Application Boot Loader .................................................................................................................................. 9
Figure 11 : Boot mode Detected ..................................................................................................................................... 10
Figure 12 : Firmware upgrade completion ...................................................................................................................... 10
Figure 13 : Firmware upgrade window ............................................................................................................................ 11
Figure 14 : Firmware upgrade completion ...................................................................................................................... 12
Figure 15 : Memory Map ................................................................................................................................................. 14
Figure 16 : Measurement Settings .................................................................................................................................. 15
Figure 17 : Sensor Metrics .............................................................................................................................................. 16
Figure 18 : Data Export ................................................................................................................................................... 17
Figure 19 : Register Access ............................................................................................................................................ 17
Figure 20 : Calibration window ........................................................................................................................................ 18
Figure 21 : Selecting USB device corresponding to application board ........................................................................... 19
Figure 22 : USB driver installation................................................................................................................................... 19
List of tables
Table 1 : The technical specifications of the BME280 sensor .......................................................................................... 5
Table 3 : General TroubeShoot....................................................................................................................................... 20

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1 About user manual
This manual describes the installation and usage of the Development Desktop 2.1 User Interface (DD2.1 UI); a
Windows based PC software application and related embedded firmware/software developed by Bosch Sensortec for
demonstration and evaluation of sensors.
1.1 Who should read this manual
This information is intended to users who wish to use the BME280 sensor alongside DD2.1 UI to
graphically display the Indoor Air Quality (IAQ), relative humidity, altitude, and associated components.
1.2 DD2.1 UI Overview
DD2.1 UI is a PC based software used to read, capture, and display sensor data. To display the sensor data of
BME280 on DD2.1 UI, mount the sensor on the Bosch Sensortec application board. This is a universal demonstration
environment for Bosch Sensortec sensor products.
Bosch Sensortec sensors are mounted on sensor specific shuttle boards. All sensors shuttle boards have an
identical footprint and can be plugged into the application board’s shuttle board socket. DD2.1 UI automatically detects
the sensor that has been plugged in and starts the corresponding software application.
1.3 Sensor Communication:
DD2.1 UI software supports both SPI and I2C to communicate with the sensor.
1.4 Graphical display:
DD2.1 UI displays the sensor data and interrupts in different graphical formats.
1.5 Data logging:
DD2.1 UI offers data logging of the sensor data.

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2 About the BME280
The typical applications that use BME280 are:
• Context awareness, e.g. skin detection, room change detection
• Fitness monitoring / well-being
• Warning regarding dryness or high temperatures
• Measurement of volume and air flow
• Home automation control
• control heating, venting, air conditioning (HVAC)
• Internet of things
• GPS enhancement (e.g. time-to-first-fix improvement, dead reckoning, slope detection)
• Indoor navigation (change of floor detection, elevator detection)
• Outdoor navigation, leisure and sports applications
• Weather forecast
• Vertical velocity indication (rise/sink speed)
The targeted devices that use BME280 are:
• Handsets such as mobile phones, tablet PCs, GPS devices
• Navigation systems
• Gaming, e.g flying toys
• Camera (DSC, video)
• Home weather stations
• Flying toys
• Watches
Table 1 : The technical specifications of the BME280 sensor
Parameter
Technical Data
Package Dimensions
8-Pin LGA with metal
2.5 x 2.5 x 0.93 mm³
Operation Range (full accuracy)
Pressure: 300...1100 hPa
Temperature: -40…85°C
Supply Voltage VDDIO
Supply Voltage VDD
1.2 ... 3.6 V
1.71 ... 3.6 V
Interface
I²C and SPI
Average current consumption
(1Hz data refresh rate)
1.8 μA @ 1 Hz (H, T)
2.8 μA @ 1 Hz (P, T)
3.6 μA @ 1 Hz (H, P, T)
T = temperature
Average current consumption in
sleep mode
0.1 μA
Pressure sensor
RMS Noise
Sensitivity Error
Temperature coefficient offset
0.2Pa (equiv. to 1.7cm)
±0.25% (equiv. to 1m at 400m height change)
±1.5Pa/K (equiv. to ±12.6cm at 1 °C temperature
change)
Humidity sensor:
Response time (τ63%)
Accuracy tolerance
Hysteresis
1 s
±3% relative humidity
≤2% relative humidity

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3 Getting Started
The below sections highlight the procedure to set up connections between BME280, DD2.1 UI , and the PC.
3.1 Setting Up the board-PC connection
The procedure to connect sensor to PC via USB is as below:
Install DD2.1 UI
Insert the shuttle board and application board.
Figure 1 : Insert sensor for APP2.0
Connect the board and PC using a USB cable/Bluetooth.
Figure 2 : Insert sensor for APP3.0
Figure 3 : Connect board and PC for APP2.0

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Turn the on/off switch ON. The LED glows.
Figure 5 : Connection complete for APP2.0
Figure 6 : Connection complete for APP3.0
To start the DD2.1 UI software:
Click Start -> Programs -> Development Desktop 2.1.
Or
Double click the DD2.1 UI software icon on the desktop.
The Graphical User Interface (GUI) of the software is as seen below:
Figure 4 : Connect board and PC for APP3.0

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Figure 7 :: DD2.1 UI Startup View
When the PC and board are connected, the Communication Status glows green as shown below:
Figure 8 : Communication Status
•The communication status is also indicated at the bottom right of the GUI at all times:
•Other menu options include:
▪File
▪Interface Selection
▪Panels
▪Settings
▪Help
These menu options are explained in detail in the following sections.

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3.2 Upgrading Firmware
3.2.1 For App 2.0 Board:
To upgrade the firmware of DD2.1 UI to match the current version, follow the steps below:
Click Menu -> Settings-> Firmware Upgrade. The following window appears:
Figure 9 : Firmware upgrade window
Click Enter Boot mode.
▪Switch off board, and press Switch 2.In Application board, all four LEDs will glow simultaneously.
▪Click OK.
▪All four LEDs will glow simultaneously.
▪Press OK.
Figure 10 : Application Boot Loader

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Figure 11 : Boot mode Detected
Select the default firmware update file (*.fwu2) from the DD2.1 UI installation directory in the folder Firmware.
Click Flash.
Once firmware upgrade is complete, restart the application board, and DD2.1 UI.
3.2.2 For App 3.0 Board:
To upgrade the firmware of DD2.1 UI to match the current version, follow the steps below:
1. Click Menu -> Settings-> Firmware Upgrade. The following window appears:
Figure 12 : Firmware upgrade completion