1. Makeblock Help Center
  2. Products
  3. mBot Ranger

    mBot Ranger Bluetooth Connection Issue

    Avatar
    Makeblock Customer Service Team

    This article applies to mBot Ranger.

     

    Issue Description

    When the Ranger tries to connect to a computer or mobile device via Bluetooth, the product is not recognized for connection (e.g., the software page cannot find the device Bluetooth, and the app page stays in a spinning circle searching). Or the Bluetooth connection to the mobile device is successful, but it is frequently disconnected due to operations such as motor operation.

     

    一. Computer bluetooth connecttion problem

    (1) Possible Causes

    1. If users want to connect the mBlock software directly via computer Bluetooth, it is necessary to ensure that the computer's built-in Bluetooth protocol is the standard 4.0 version, otherwise the device cannot be recognized.
    2. The Bluetooth module is faulty.

     

    (2) Troubleshooting Steps

    1. The PC version of mBlock has restriction on the Bluetooth version of the computer. It is recommended to use the Bluetooth direct connection function of the mBlock Web version directly. This method has no restrictions: https://ide.mblock.cc/ 
    2. Please check whether the indicator light of the Bluetooth module is normal after power on. The indicator light of the Bluetooth module flashes slowly in blue after turning on, and turns to constant blue after the Bluetooth connection is successful. If the indicator light displays incorrectly in different states, you may need to replace a new module.

     

    二. App bluetooth connection problem

    (1) Possible Causes

    1. Bluetooth module failure.
    2. The mobile device does not enable Bluetooth authorization for the specific app.
    3. Interference from some previously uploaded programs or incorrect firmware version.
    4. Battery problem (battery power is too low/voltage is unstable).

     

    (2) Troubleshooting Steps

    1. Check whether the Bluetooth module indicator light is normal. The indicator light of the Bluetooth module flashes slowly in blue after power on, and becomes constant blue when the Bluetooth connection is successful. If the indicator light displays incorrectly in different states, you may need to replace a new module.
    1. Enter the mobile device to confirm whether Bluetooth authorization is turned on (operations may differ slightly for different device models)
    • iOS system: Enter the "Settings" section of the mobile device, select "Privacy", click "Bluetooth", and check whether the authorization button of the corresponding app is turned on.
    • Android system: Enter the "Settings" section of the mobile device, select "Privacy Protection", click "Change Bluetooth connectivity" in "Other permissions", and check whether the corresponding app has selected to allow authorization.

     

    3. If you have uploaded one program to mBot Ranger before, the indicator light of the bluetooth module may display incorrectly when trying to connect to the app via Bluetooth, and an error message "Firmware cannot be recognized" may appear. Please refer to the article "How to Update mBot Ranger Firmware" to refresh and reconnect.

    4. If the product is currently powered a battery holder, please install new Nanfu AA batteries. If the problem persists, you can plug in a USB cable to power the product at the same time, and then test the Bluetooth connection in the App. If the connection is successful at this time, it can be verified that the problem is the battery. It is recommended to use Makeblock rechargeable battery pack.

     

    Still Need Help？

    If the problem is not resolved, please contact us via service@makeblock.com with the necessary details of the fault, such as order number, operation video, device firmware and software version.
    Was this article helpful?
    0 out of 0 found this helpful

    Comments

    0 comments

    Please sign in to leave a comment.