Christoph Laib

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10 years, 8 months ago.

USB Mass Storage

hello i'm struggling with the " MBED" drive on the uBlox c027 got a powered USB Hub and powered the board as well with 12v. I can't write anything to the filesystem. I flashed the latest and greatest firmware as well. tried it with several WIN7 computer and a mac same result....

any advice highly appreciated thanks

Question relating to:

Last updated: 27 Aug 2020
The u-blox-C027 is a complete starter kit that allows quick prototyping of a variety of applications for the Internet of Things. The application board has a MAX-M8Q GPS/GNSS receiver and …

2 Answers

Christoph Laib
poster
10 years, 8 months ago.

thanks for the fast reply ! - yes, i see the disk

content of the mbed.htm file :

<! mbed Microcontroller Website and Authentication Shortcut > <! Version: 0200 Build: Dec 20 2013 13:33:37 > <html> <head> <meta http-equiv="refresh" content="0; url=http://mbed.org/device/?code=12340200E38AD61E992A0958"/> <title>mbed Website Shortcut</title> </head> <body></body> </html>

there is a fail.txt, but it does not stay in the volume : something about power...

regards CL

Accepted Answer

Can you confirm that you supply 7-17v DC on the Barrel jack connector or the VIN pin on the Arduino headers? You have to supply power in addition to connecting USB.

posted by Michael Ammann 02 Mar 2014

yes : i have external power to the 1-17V Barrel Jack ( 12v ) , pulling ca. 500mA and a powered USB Hub

posted by Christoph Laib 02 Mar 2014
Michael Ammann
10 years, 8 months ago.

You need to power with USB and a external power supply on VIN (7-17V).

Few questions to help us debug this:

  • Do you see the mbed disk?
  • Could you please let me know the content of mbed.htm file?
  • Is there a fail.txt file after you drag and drop the program?

in the meantime i updated to the latest ( 28.2.2014 ) Firmware : still got the same problems.. Also tried with a Linux Machine : can't copy any .bins

posted by Christoph Laib 02 Mar 2014

A power consumption of >500mA is too high, I would expect something like 200mA at VIN even with the GSM/3G in connected mode.

posted by Michael Ammann 04 Mar 2014