USER MANUAL BWT61CL Bluetooth 2.0 Inclinometer Sensor BWT61CL | manual v0707 | http://wiki.wit-motion.
Tutorial Link Google Drive Link to instructions DEMO: WITMOTION Youtube Channel BWT61CL 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.
Contents Tutorial Link................................................................................................- 2 Contact......................................................................................................... - 2 Application.................................................................................................. - 2 Contents...................................................................................................... - 3 1 Introduction..............................
3 Use Instructions with Android Phone........................................ - 27 3.1 APP Installation........................................................................ - 27 3.2 Connection................................................................................. - 28 3.2.1 APP Pairing...................................................................... - 28 3.2.2 Phone’s Bluetooth Pairing..........................................- 30 3.3 Calibration............................................
1 Introduction The BWT61CL is a multi-sensor device detecting acceleration, angular velocity and angle . 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. BWT61CL’s scientific name is AHRS IMU sensor.
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. VCC cannot connect with GND directly, otherwise it will lead to the burning of the circuit board. 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 is fixed.
2 Use Instructions with PC 2.1 PC Connection PC software is only compatible with Windows system. BWT61CL Playlist 2.1.1 Serial Connection Step 1. Connect the sensor with a serial converter PIN Connection: VCC 5V TX RX RX TX GND - GND (When connecting with computer, VCC-5V is recommended.) BWT61CL | manual v0707 | http://wiki.wit-motion.
Recommended tools: 3-in-1 converter 6-in-1 converter TTL serial cable Step 2. Unzip the software and install the driver CH340 or CP2102 (Depending on which accessory for usage.) Link to tutorial of 3-in-1 serial converter/ TTL serial cable (CH340 driver) Link to tutorial of 6-in-1 serial converter (CP2102 driver) Step 3. Plugin the converter to computer and confirm the “com port” in device manager Step 4. Open the software(Minimu.
2.1.2 USB-HID connection Step 1. Insert the USB-HID adapter to USB slot in the beginning Step 2. Turn on the sensor after red light of HID adapter flashes Step 3. Wait till the sensor's blue LED light keeps on--pairing succeeds Step 4. Open the software, Minimu.exe Step 5. Data will appear once the auto-search finishes. BWT61CL | manual v0707 | http://wiki.wit-motion.
2.1.3 PC’s Bluetooth Connection Step 1. Turn on computer's Bluetooth Step 2. Turn on the sensor Step 3. Search HC-06 device and input pairing password, 1234 Step 4. Confirm the outgoing com port on “More Bluetooth Options” page Step 5. Open software (Minimu.exe) and choose the correct com port Step 6. Data will appear once the automatic search finishes BWT61CL | manual v0707 | http://wiki.wit-motion.
2.2 Software Introduction Link to download software 2.2.1 Main Menu Main Menu of software Button Function File Launch recorded HEX file (Bin format) Tools Hide or display tools box on left side Record Record function 3D 3D Unity DEMO Config Configuration setting Help Language Switch to English or Chinese Bluetooth Set Option for binding device or unbind Firmware update Option for firmware update About Minimu Info about Minimu.
Open Open com port Close Close com port Acc Calibrate Acceleration calibration BWT61CL | manual v0707 | http://wiki.wit-motion.
2.2.
Menu of Data Button Function Time Real time Acceleration Data for Acceleration Angular Velocity Data for Angular Velocity Angle Data for Angle BWT61CL | manual v0707 | http://wiki.wit-motion.
2.3 Calibration Preparation: Make sure the sensor is “Online”. Calibration on PC software： It is required to calibrate for the first time usage. 2.3.1 Accelerometer Calibration Purpose: The accelerometer calibration is used to remove the zero bias of the accelerometer. Before calibration, there will be different degrees of bias error. After calibration, the measurement will be accurate. Methods: 1.
2.3.2 Reset Z-axis Angle Z-axis to 0 is to make the initial angle of the Z-axis angle is relative 0 degree. When the module is used before and Z-axis drift is large, the Z-axis can be calibrated, When the module is powered on, the Z-axis will automatically return to 0. Calibration methods as follow: Step 1: Keep the module static. Step 2: Open the “Config” and then click the “Reset Z-axis Angle” option, you will see the angle of the Z-axis backs to 0 degree in the module data bar.
BWT61CL | manual v0707 | http://wiki.wit-motion.
2.4 Configuration 2.4.1 Set Baud Rate Not available for Bluetooth sensor series. 2.4.2 Data Recording There is no memory chip in the sensor module, and the data can be recorded and saved on the computer. Method are as follows: Click“Record”and“Begin”will save the data as a TXT file. The saved file is in the directory of the PC software program Data.tsv. The beginning of the file has the value corresponding to the data. BWT61CL | manual v0707 | http://wiki.wit-motion.
It is highly recommended that data can be pasted to a Excel file. In this way, all data will be shown in order. BWT61CL | manual v0707 | http://wiki.wit-motion.
2.4.3 Data Playback New function: When creating recorded file each time, there will a BIN file created in the folder of record file in path of installed software meanwhile. Recorded data playback method: Step 1: Disconnect the sensor Step 2: Click “File” Button and then click “Load” Step 3: Choose the original path of software installation and load the Bin file BWT61CL | manual v0707 | http://wiki.wit-motion.
Step 4: Click “Run” and the Binary file will be playback When playback, the rate can be editable. BWT61CL | manual v0707 | http://wiki.wit-motion.
2.4.4 Standby and Wake Up Not available for Bluetooth sensor series. 2.4.5 Placement Direction The default installation direction of the module is horizontal. When the module needs to be installed vertically, the vertical installation can be set. Step 1: Rotate the module 90 degrees around the X-axis Step 2: Place the sensor 90 degrees vertically BWT61CL | manual v0707 | http://wiki.wit-motion.
Step 3: Click “Vertical” as install directions on “Config” menu BWT61CL | manual v0707 | http://wiki.wit-motion.
2.4.6 Static Threshold Static threshold: When the module is stationary, the angular velocity measured by the gyro chip changes slightly. The function of the static threshold is that when the angular velocity is less than the threshold, the module output angular velocity is 0. Setting method: Click the "Still Threshold" option in the configuration bar of the PC software to set the threshold. The module default is 0.122°/ s. BWT61CL | manual v0707 | http://wiki.wit-motion.
2.4.7 Bandwidth Default bandwidth is 10Hz. Function: 1. The higher rate of bandwidth setting will lead to the higher fluctuation in data waveform. Conversely, the lower rate of bandwidth, data will become more fluent. For example: Bandwidth as 20Hz, Output rate as 5Hz. The waveform is very steady. BWT61CL | manual v0707 | http://wiki.wit-motion.
Bandwidth as 256Hz, Output rate as 20Hz. The waveform will show more fluctuation. 2. The higher rate of bandwidth will solve the data-repeating problem. For example, if the bandwidth setting is 20Hz, retrieval rate as 100Hz, there will be 5 repeating data. If you prefer there is no repeating data, it is required to increase the bandwidth more than 100Hz. BWT61CL | manual v0707 | http://wiki.wit-motion.
3 Use Instructions with Android Phone For APP configuration introduction, please referring to the Chapter 2.2 3.1 APP Installation Install the APK file, give permission of Location and Storage Link to download Android APP About Android APP: 1.
3.2 Connection BWT61CL Playlist 3.2.1 APP Pairing Step 1. Install the APK file, give permission of Location and Storage Step 2. Open APP and choose “6-axis Series” Step 3. Turn on the sensor and search “HC-06”, input password “1234”. BWT61CL | manual v0707 | http://wiki.wit-motion.
Step 4. When pairing is done, the blue LED light of sensor will remain still. After a few seconds, the data will show automatically. BWT61CL | manual v0707 | http://wiki.wit-motion.
3.2.2 Phone’s Bluetooth Pairing Step 1. Install the APK file, give permission of Location and Storage Step 2. Turn on the Bluetooth in the setting menu of smartphone Step 3. Search the Bluetooth sensor (First pairing the device will be recognize as mac address and will be shown as HC-06 after successful pairing.) Step 4. Click the “MAC addrees” device and input the password “1234” BWT61CL | manual v0707 | http://wiki.wit-motion.
Step 5. Open the WITMOTION APP, and choose “6-axis Series” Step 6. Click “Scan” and select the paired Bluetooth device “HC-06” (No need to input password) Step 7. The Blue LED light of sensor will remain still. Connection with APP is successful. BWT61CL | manual v0707 | http://wiki.wit-motion.
3.3 Calibration 3.3.1 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 4. Judge the result--confirm if there is 1g on Z-axis acceleration BWT61CL | manual v0707 | http://wiki.wit-motion.
3.3.2 Reset Z-axis Angle Step 1. Keep the module horizontally stationary Step 2. Click the “Calibration” menu Step 3. Click the “Z-axis return to zero” and wait for 3 seconds Step 4. Check the data of “Angle Z” to see if it is 0° BWT61CL | manual v0707 | http://wiki.wit-motion.
4 Multiple Connection For software introduction, please referring to the Chapter 2.2. 4.1 Download Link For multi-connection, please download the multi-connection HID software. Download link 4.2 Connection Instructions Step 1. Open the multiple-connection PC software Step 2. Plugin the USB-HID adapter in the beginning Step 3. Turn on the sensor after the red light of USB-HID adapter begins flashing Step 4. Wait till sensor's blue LED light stops flashing--means pairing succeeds Step 5.
5 MCU Connection Link to download all sample code Link to sample code instructions demo Notice: There is no sample code provided for Linux or Python system at present. 5.1 Arduino Download link Arduino UNO3 Demo Link 5.2 STM32 Download link 5.3 Raspberry pi Tutorial link 5.4 C# DEMO link BWT61CL | manual v0707 | http://wiki.wit-motion.
5.5 C++ DEMO link 5.6 Matlab Receive Sample Code Dataplot DEMO BWT61CL | manual v0707 | http://wiki.wit-motion.
