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RAK12025 WisBlock Gyroscope Sensor Module Quick Start Guide

Prerequisite​

Package Inclusions​

Before going through each and every step on using the RAK12025 WisBlock Gyroscope Sensor Module, make sure to prepare the necessary items listed below:

Hardware​

Software​

  • Download and install the Arduino IDE.
  • To add the RAKwireless Core boards on your Arduino board, install the RAKwireless Arduino BSP. Follow the steps in the Github repo.

Product Configuration​

Hardware Setup​

WisBlock can integrate this module which extends the WisBlock system with a gyroscope sensor.

For more information about RAK12025, refer to the Datasheet.

The RAK12025 module gives us information about:

  • Selectable full scale (245/500/2000 dps)
  • I2C interface
  • 16-bit rate value data output
  • 8-bit temperature data output

RAK12025 module can be connected to the sensor's slot of WisBlock Base to communicate with the WisBlock Core, as shown in Figure 1. It will work on SLOT C to F. Also, always secure the connection of the WisBlock module by using compatible screws.

NOTE

RAK12025 has two digital output lines, so you need two GPIOs from WisBlock Core. It means RAK12025 should be used on a sensor slot with two available GPIOs. However, WB_IO2 is used to control 3V3_S. Hence, RAK12025 is used only on slots without WB_IO2 like sensor slots C and D on WisBlock Base board.

Figure 2657: RAK12025 connection to WisBlock Base

Assembling and Disassembling of WisBlock Modules​

Assembling​

As shown in Figure 2, the location for Slot A, B, C, and D are properly marked by silkscreen. Follow carefully the procedure defined in WisBlock Base board module assembly/disassembly instructions to attach a WisBlock module. Once attached, carefully fix the module with one or more pieces of M1.2 x 3 mm screws depending on the module.

Figure 2658: RAK12025 connection to WisBlock Base
Disassembling​

The procedure in disassembling any type of WisBlock modules is the same.

  1. First, remove the screws.
Figure 2659: Removing screws from the WisBlock module
  1. Once the screws are removed, check the silkscreen of the module to find the correct location where force can be applied.
Figure 2660: Detaching silkscreen on the WisBlock module
  1. Apply force to the module at the position of the connector, as shown in Figure 5, to detach the module from the baseboard.
Figure 2661: Applying even forces on the proper location of a WisBlock module
NOTE

If you will connect other modules to the remaining WisBlock Base slots, check on the WisBlock Pin Mapper tool for possible conflicts. RAK12025 uses I2C communication lines, and it can cause possible conflict, especially on some IO modules.

After all this setup, you can now connect the battery and USB cable to start programming your WisBlock Core.

warning
  • Batteries can cause harm if not handled properly.
  • Only 3.7-4.2 V Rechargeable LiPo batteries are supported. It is highly recommended not to use other types of batteries with the system unless you know what you are doing.
  • If a non-rechargeable battery is used, it has to be unplugged first before connecting the USB cable to the USB port of the board to configure the device. Not doing so might damage the battery or cause a fire.
  • Only 5 V solar panels are supported. Do not use 12 V solar panels. It will destroy the charging unit and eventually other electronic parts.
  • Make sure the battery wires match the polarity on the WisBlock Base board. Not all batteries have the same wiring.

Software Configuration and Example​

The RAK12025 is a gyroscope sensor board that contains an I3G4250D chip. The I3G4250D is a low-power 3-axis angular rate sensor able to provide unprecedented stability at a zero-rate level and sensitivity over temperature and time, with digital I2C/SPI serial interface standard output.

Initial Test of the RAK12025 WisBlock Module​

  1. Install the RAKwireless Arduino BSP for WisBlock by using the package_rakwireless_index.json board installation package. The WisBlock Core should now be available on the Arduino IDE.

  2. You need to select first the WisBlock Core you have, as shown in Figure 6 to Figure 8.

RAK4631 Board

Figure 2662: Selecting RAK4631 as WisBlock Core

RAK11200 Board

Figure 2663: Selecting RAK11200 as WisBlock Core

RAK11310 Board

Figure 2664: Selecting RAK11300 as WisBlock Core
  1. Copy the Basic Sample Code for RAK12025 in Github. You can open the example codes depending on your WisBlock Core, as shown in Figure 9.
NOTE

If you experience any error in compiling the example sketch, check the updated code for your WisBlock Core Module that can be found on the RAK12025 WisBlock Example Code Repository. This sample code in Github will work on all WisBlock Core.

Figure 2665: Copying the RAK12025 example code for RAK4631 WisBlock Core
  1. Once the example code is copied, install the RAKwireless I3G4250D Gyroscope Library by clicking the red-highlighted link, as shown in Figure 10 and Figure 11.
Figure 2666: Installing the compatible library for RAK12025 Gyroscope Sensor Module
Figure 2667: Successful installing the library for RAK12025 Gyroscope Sensor Module
  1. After successful installation of the library, you can now select the right serial port and upload the code, as shown in Figure 12 and Figure 13.
NOTE

If you are using the RAK11200 as your WisBlock Core, the RAK11200 requires the Boot0 pin to be configured properly first before uploading. If not done properly, uploading the source code to RAK11200 will fail. Check the full details on the RAK11200 Quick Start Guide.

Figure 2668: Selecting the correct serial port
Figure 2669: Uploading the RAK12025 example code
  1. When you have successfully uploaded the example sketch, open the serial monitor of the Arduino IDE to see the sensor's reading logs. If you see the logs, as shown in Figure 14, then your RAK12025 is communicating with the WisBlock core properly.
Figure 2670: RAK12025 Gyroscope Sensor Module Data Logs