WiT WT901BLECL User manual

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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USER MANUAL
WT901BLECL BLE5.0
Bluetooth 5.0 Inclinometer Sensor

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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Tutorial Link
Google Drive
Link to instructions DEMO:
WITMOTION Youtube Channel
WT901BLECL Playlist
If you have technical problems or cannot find the information that you need in the
provided documents, please contact our support team. Our engineering team is
committed to providing the required support necessary to ensure that you are
successful with the operation of our AHRS sensors.
Contact
Technical Support Contact Info
Application
●AGV Truck
●Platform Stability
● Auto Safety System
●3D Virtual Reality
●Industrial Control
●Robot
●Car Navigation
●UAV
●Truck-mounted Satellite Antenna Equipment

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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Contents
Tutorial Link .............................................................................. - 2 -
Contact .................................................................................... - 2 -
Application................................................................................ - 2 -
Contents................................................................................... - 3 -
1 Introduction ......................................................................... - 5 -
1.1 Warning Statement ....................................................... - 6 -
1.2 LED Status................................................................... - 6 -
2 Use Instructions with Android Phone ........................................ - 7 -
2.1 APP Installation ............................................................ - 7 -
2.2 Connection................................................................... - 8 -
2.3 Calibration ................................................................. - 11 -
2.3.1 Acceleration Calibration ......................................... - 11 -
2.3.2 Magnetic Field Calibration ...................................... - 12 -
2.4 Multi-connection ......................................................... - 13 -
3 Use Instructions with iPhone ................................................. - 14 -
3.1 How to install ............................................................. - 14 -
3.2 How to setup.............................................................. - 15 -
3.3 How to configure......................................................... - 17 -
3.3.1 Rename............................................................... - 18 -
3.4 Data Recording ........................................................... - 19 -
4 Use Instructions with PC....................................................... - 21 -
4.1 PC Connection ............................................................ - 22 -
4.1.1 Serial Connection.................................................. - 22 -
4.1.2 BLE 5.0 Adapter Connection ................................... - 25 -
4.2 Software Introduction .................................................. - 28 -
4.2.1 Main Menu ........................................................... - 28 -

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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4.2.2 Menu of Configuration ........................................... - 29 -
4.3 Calibration ................................................................. - 31 -
4.3.1 Accelerometer Calibration ...................................... - 31 -
4.3.2 Magnetic Field Calibration ...................................... - 33 -
4.3.3 Gyroscope Automatic Calibration............................. - 35 -
4.3.4 Reset Z-axis Angle ................................................ - 35 -
4.3.5 Reset Height to 0 .................................................. - 35 -
4.4 Configuration.............................................................. - 36 -
4.4.1 Data Recording..................................................... - 36 -
4.4.2 Data Playback ...................................................... - 38 -
4.4.3 Placement Direction .............................................. - 40 -
4.4.4 Bandwidth ........................................................... - 41 -
4.4.5 6-axis/ 9-axis Algorithm ........................................ - 43 -
5 Instructions of 2023 New Software ........................................ - 44 -
6 Multiple-Connection Instructions............................................ - 45 -
6.1 Connection Instructions .................................................. - 46 -
6.1 Software Setting ......................................................... - 48 -
6.1.1 Data Configuration ................................................ - 48 -
6.1.2 Calibrate.............................................................. - 50 -
6.1.3 Device name Edition.............................................. - 51 -
6.1.4 Curve Display....................................................... - 52 -
6.1.5 Data Recording..................................................... - 53 -

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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1Introduction
The WT901BLECL BLE5.0 is a multi-sensor device detecting acceleration,
angular velocity, angle as well as magnetic filed. The robust housing and the
small outline makes it perfectly suitable for industrial retrofit applications
such as condition monitoring and predictive maintenance. Configuring the
device enables the customer to address a broad variety of use cases by
interpreting the sensor data by smart algorithms.
WT901BLECL BLE5.0’s scientific name is AHRS IMU sensor. A sensor
measures 3-axis angle, angular velocity, acceleration, magnetic field. Its
strength lies in the algorithm which can calculate the three-axis angle
accurately.
It is employed where the highest measurement accuracy is required.
WT901BLECL BLE5.0 offers several advantages over competing sensor:
•Heated for best data availability: new WITMOTION patented zero-bias
automatic detection calibration algorithm outperforms traditional
accelerometer sensor
•High precision Roll Pitch Yaw (X Y Z axis) Acceleration + Angular Velocity +
Angle + Magnetic Field output
•Low cost of ownership: remote diagnostics and lifetime technical support by
WITMOTION service team
•Developed tutorial: providing manual, datasheet, demo video, free software
for Windows computer, APP for Android smartphones
•WITMOTION sensors have been praised by thousands of engineers as a
recommended attitude measurement solution

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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1.1 Warning Statement
➢Putting more than 5 Volt across the sensor wiring of
the main power supply can lead to permanent damage
to the sensor.
➢For proper instrument grounding: use WITMOTION
with its original factory-made cable or accessories.
➢Do not access the I2C interface.
➢Do not change the baud rate because WitMotion
Bluetooth sensor’s baud rate (Defalut 115200) is
fixed.
1.2 LED Status
LED
Status
Remark
Red
Keeping on
Charging (powered by offered Type-C
wire)
Blue
Flashing quickly
Standby
Flashing slowly
Pairing succeeds

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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2Use Instructions with Android Phone
For APP configuration introduction, please referring to the link.
https://drive.google.com/file/d/122Es4QPLi5R-O4TjN43FMFRcaNK9eSY8/view
?usp=share_link
2.1 APP Installation
Install the APK file, give permission of Location and Storage
WITMOTION 2023v New Android APP
Link to check the tutorial video.
https://youtube.com/playlist?list=PL43tdDrVL_VBMU2CrEZfC0MxA0aRz-EY1
About Android APP:
1. It is required to allow for application positioning (Always allowed), and turn
on the positioning function and Bluetooth.
Note: Paired devices can be searched without turning on positioning, but
according to Google's requirements, if APP installed on a higher version of
Android (6.0) mobile phone is paired with a Bluetooth device, positioning must
be allowed when using Bluetooth at the same time.
2. After turning on Bluetooth, it takes about one minute to search for
authorization to find Bluetooth.

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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2.2 Connection
Step 1. Install the APK file, give permission of Location and Storage
Step 2. Open APP and click “Connect”

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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Step 3: Turn on the sensor, select “BWT901BLCL5.0”or “WT901BLECL”and
then scan the device
Note: The device will show as “WT901BLE”+“MAC address”

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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Step 4. When pairing is done, the blue LED light of the sensor will flash and keep
about one second
After a few seconds, the data will show automatically

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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2.3 Calibration
2.3.1 Acceleration Calibration
Step 1. Keep the module horizontally stationary
Step 2. Click the “Calibration”menu
Step 3. Click the “Acceleration Calibration”and wait for 3 seconds
Step 5. Check the result--confirm if there is 1g on Z-axis acceleration

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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2.3.2 Magnetic Field Calibration
Step 1. Click the "Calibration" menu
Step 2. Click the "Magnetic calibration" button
Step 3. Slowly rotate the module 360°around X, Y, Z, 3-axis accordingly
Step 4. After rotation, click “Finish”
Check the result: The Z-axis angle will have less drift than before.
Notice: If there is drift of Z-axis, please stay away from the objective that can
create magnetic field interference.

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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2.4 Multi-connection
Link to the multi-connection video demo.
https://youtu.be/7M6R5Tjrz8U
As with PC software, we recommend up to 4 devices multi-connection.
Below is the different phones’ actual measure distance.
BD= Best distance; MD=Max distance
WT901BLECL
Single device
Two devices
Three devices
Four devices
Phone
BD/m
MD/m
BD/m
MD/m
BD/m
MD/m
BD/m
MD/m
Samsung
Android 13
37m
69m
Honor
Android 12
24m
59m
27m
53m
11m
33m
9m
20m
Redmi
Android 10
14m
22m
9m
17m
7m
13m
4m
9m
vivo
Android 12
61m
70m
26m
38m
14m
28m
7m
35m
Oppo
Android 13
129m
25m
41m
18m
32m
11
21m
Xiaomi
Android 11
35m
75m
38m
66m
30m
35m
iPhone
Ios16.4.1
34m
42m
Lenovo
Android 11
36m
61m
29m
48m
22m
44m
30m
72

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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3Use Instructions with iPhone
The new version of iOS APP has been launched. There will be many function
coming out soon in future.
NOTICE:
The existing function of history recording is in instructions at present.
Your understanding would be highly appreciated.
If you phone comes with txt reader, the recorded file can be easily opened.
A txt recorder like Micro Software.
https://www.youtube.com/playlist?list=PL43tdDrVL_VCgrQJTaODOhkkbmTkS
1kMs
3.1 How to install
Step 1. Search “WITMOTION”on iOS App Store, and install the APP

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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3.2 How to setup
Step 1. Turn on the sensor and then click “Scan”
Sensor device ID will be recognized as WT901BLE+number
The second column is its SSID number.

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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Step 2. Select the device and the data will be online
Demo: Angle data curve

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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3.3 How to configure
For menu setting and its introduction including button and functions setting,
please referring to the Chapter 4.2.
Click the button of “SET”, the menu will jump out automatically.

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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3.3.1 Rename
Click rename and you can edit its name.
The name will be fixed with WT + Name you input.

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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3.4 Data Recording
The data can be easily recorded by simply press the button of record.
The recorded file can be txt format at present. You can send the record file to
the computer and then paste the data to an excel file for intuitive reviewing.
P.S If you meet any problem, please reach our team at
[e-mail]
Step1. Click “Record”
Step2. When you finish the record, click “End”.

WT901BLECL BLE5.0 | manual v23-0420 | www.wit-motion.com
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Step3. Once you finished the record, you need to save the file. We recommend
you choose the button “Save to Files”, the file will save the on your mobile
desktop folder.
PS: We tried all saving methods and found this method to be convenient.