How to Update the Underdash MCU and FPGA

How to Update the Underdash MCU and FPGA

Flashing the Underdash MCU & FPGA


The Micronet Underdash MCU & FPGA can be updated in two ways:
  1. Delta (MLD) Files
  2. OTA with RedBend


NOTE: These methods will perform a factory reset on the device. All applications and data will be erased.


Delta (MLD) Files


  1. Power up the Underdash device.
  2. Connect the Micronet Underdash to the computer using the development cable USB type A male connector (GCAB601B).
  3. Navigate to the folder where your ADB Tool was installed and open a Command prompt / Terminal window.
  4. Type 'adb devices' to verify the Micronet Underdash is connected.
  5. Launch Vysor or another screen emulator application. You can download Vysor for free here:
    https://www.vysor.io/download/?return=https%3A%2F%2Fwww.vysor.io%2F.
  6. Navigate to “Settings”  “About Phone”  “MCU Version” to find the MCU version. For example: MCU Version: A.2.8.0.
  7. Obtain the latest delta files from Micronet. Delta files are named as follows: MCUVersionToBeUpdated_MCUVersionAfterUpdate.mld). For example, if your MCU version is A.2.6.0 you cannot use an A.2.8.0_A.2.C.0.mld file to update your device. MLD delta files are built specific to each version update.
  8. From the terminal, navigate to the folder where you downloaded the delta file using the “cd” command. 
  9. Type 'adb root'
  10.   Type 'adb shell rm –f /cache/*'
  11.   Type 'adb push <NameofDeltaFile.mld> /cache/dp'
  12.   Type 'adb reboot recovery' 
    1. After using ‘adb reboot recovery’ the device will reboot and you will notice the right LED turn blue. Then, the device will reboot two more times and the MLD file will update the device for about 8 – 10 minutes. Once the update is finished, the left LED will turn back green.
  13. Verify that the versions were updated by checking “Settings”  “About Phone”  “MCU Version” & "FPGA Version"



NOTE: If this process doesn’t work you may also try the manual SD card delta update below:

  1. Insert the SD card into the Underdash's SD card slot.
  2. Repeat steps 1 – 9 above.
  3. Type 'adb push <NameofDeltaFile.mld> /storage/sdcard1/delta'
  4. Type 'adb reboot recovery'
    1. Again, after using ‘adb reboot recovery’ the device will reboot and you will notice the right LED turn blue. Then, the device will reboot two more times and the MLD file will update the device for about 8 – 10 minutes. Once the update is finished, the left LED will turn back green. Verify that the OS was updated by checking “Settings”  “About Phone”  “Build Number”).
  5. Verify that the versions were updated by checking “Settings”  “About Phone”  “MCU Version" & "FPGA Version"


OTA with RedBend
  1. Power up the Underdash device and make sure it is connected only to cellular data.
  2. Launch Cisco AnyConnect and type in the IP Address: 94.236.41.232 and click “connect” to enter Micronet’s virtual private network (VPN). If you do not have Cisco AnyConnect you can download it free here: https://software.cisco.com/download/home/286281283/type/282364313/release/4.6.03049
  3. In a web browser type http://192.168.137.20:8080/sma and hit enter.
  4. Enter your specific login credentials for the RedBend server.
  5. In the RedBend Dashboard navigate to “Software Management”  “New Campaign”
  6. Enter a Campaign Name, select which device you want to update by the Device’s ID (IMEI number), then select “Update All Software to the Latest Version” under “Select Action”
  7. Click “Run Campaign” at the bottom to initiate the updates.
  8. Launch the RedBend “Software Management” app on the Underdash device and the updates will be installed automatically.



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