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AC Current Click (Mikroe)

Summary

This project aims to show the hardware driver that is used to interface with the AC Current driver with the Silicon Labs Platform.

AC Current click is a device that is able to measure the alternating current (AC) running through the conductor. The non-invasive sensor works by utilizing the electromagnetic induction phenomenon, similar to a transformer. The primary coil does not exist though, the electromagnetic field is generated by the AC Current running through the cable which is measured. The low-noise 12-bit SAR A/D converter (ADC) converts the sensor voltage, providing conversion data via the industry-standard SPI interface.

The Click board™ comes equipped with the 3.5mm jack connector which is used to attach the sensing probe. This board also comes as the part of the AC Current click - bundle, which also contains the current measuring sensor, calibrated and well suited to work with the AC Current click (10A - 1V).

Required Hardware

Hardware Connection

  • If the BGM220 Explorer Kit is used:

    The AC Current Click board supports MikroBus, so it can connect easily to the Explorer Kit via MikroBus header. Assure that the 45-degree corner of the Click board matches the 45-degree white line of the Explorer Kit.

    The hardware connection is shown in the image below:

    board

  • If the SiWx917 Wi-Fi 6 and Bluetooth LE 8 MB Flash SoC Pro Kit is used:

    Description BRD4338A GPIO BRD4002 EXP Header AC Current Click
    CLK GPIO_25 P25 SCK
    MISO GPIO_26 P27 SDO
    CS GPIO_28 P31 CS

Setup

You can either create a project based on an example project or start with an empty example project.

Create a project based on an example project

  1. From the Launcher Home, add your board to My Products, click on it, and click on the EXAMPLE PROJECTS & DEMOS tab. Find the example project filtering by 'accurrent'.

  2. Click Create button on the Third Party Hardware Drivers - AC Current Click (Mikroe) example. Example project creation dialog pops up -> click Create and Finish and Project should be generated.

    Create_example

  3. Build and flash this example to the board.

Start with an empty example project

  1. Create an "Empty C Project" for the your board using Simplicity Studio v5. Use the default project settings.

  2. Copy the file app/example/mikroe_accurrent/app.c into the project root folder (overwriting the existing file).

  3. Install the software components:

    • Open the .slcp file in the project.

    • Select the SOFTWARE COMPONENTS tab.

    • Install the following components:

    If the BGM220P Explorer Kit is used:

    • [Services] → [IO Stream] → [IO Stream: EUSART] → default instance name: vcom
    • [Application] → [Utility] → [Log]
    • [Services] → [Timers] → [Sleep Timer]
    • [Third Party Hardware Drivers] → [Sensors] → [AC Current Click (Mikroe)]

    If the SiWx917 Wi-Fi 6 and Bluetooth LE 8 MB Flash SoC Pro Kit is used:

    • [WiSeConnect 3 SDK] → [Device] → [Si91x] → [MCU] → [Service] → [Sleep Timer for Si91x]
    • [Third Party Hardware Drivers] → [Sensors] → [AC Current Click (Mikroe)]

  4. Build and flash this example to the board.

Note:

  • Make sure that the Third Party Hardware Drivers extension is installed. If not, follow this documentation.

  • Third-party Drivers Extension extension must be enabled for the project to install the "AC Current Click (Mikroe)" component.

How It Works

AC Current Click Click communicates with the Silicon Labs hardware via SPI interface. The example measuring AC current and shows a message on the log screen.

You can launch Console which is integrated into Simplicity Studio or use a third-party terminal tool like Putty to receive the data from the USB. A screenshot of the console output and an actual test image are shown in the figure below.

console_log

Report Bugs & Get Support

To report bugs in the Application Examples projects, please create a new "Issue" in the "Issues" section of third_party_hw_drivers_extension repo. Please reference the board, project, and source files associated with the bug, and reference line numbers. If you are proposing a fix, also include information on the proposed fix. Since these examples are provided as-is, there is no guarantee that these examples will be updated to fix these issues.

Questions and comments related to these examples should be made by creating a new "Issue" in the "Issues" section of third_party_hw_drivers_extension repo.