Not able to Flash Master Brick 2.0

[rwblinn]

Having an older Master Brick and wanted to update to latest firmware version. Updated several Masters, but this device does not work.

 

Put the Master Brick in bootloader mode (blue LEDs turned off), but the device is not recognized as serial device on:

a) Raspberry Pi 3B+ running latest brickd + brickv. When connecting via USB the RPi freezes. Plugging out, the RPi is back to normal.

b) PC running Stretch: no tty device, i.e. ttyACM0 listed.

c) PC running Windows 10 with latest brickd + brickv: No serial device found.

 

Tried to run brickv as root or admin, but did not help.

 

Any hints on how to flash the Master Brick appreciated

 

[photron]

Try to put in in bootloader mode a second time, even if the blue LED is already off.

[rwblinn]

Tried also several times (should have mentioned in first post).

 

Any other options?

[photron]

But the Master Brick worked before you put it into bootloader mode?

 

Do you have anything connected to the Master Brick, apart from the USB cable? If yes, disconnect everything apart from the USB cable and try again.

 

Is the reset button stuck, keeping the Brick in reset? Or does the reset button feel normal?

[rwblinn]

Both buttons feel OK and can be pressed and released.

 

The Master Brick worked fine prior setting in bootloader mode.

 

Tried again:

Connected to PC USB port, set bootloadermode, the Master Brick started to smell and is getting hot (can not touch anymore) ... immediate unplugged. Will not plugin anymore!

 

 

[wehnerc]

Tried again:

Connected to PC USB port, set bootloadermode, the Master Brick started to smell and is getting hot (can not touch anymore) ... immediate unplugged. Will not plugin anymore!

There it seems you have a shortlink in your connection. Please check your 4 connections to the bricklets whether there is one pin bended and touching the neighbour pin. Unbend it and try it again.

I also had one case where I couldn't upgrade a master because of this fault.

[rwblinn]

Thanks for the hint. Checked the pins - seems OK.

 

... but does not trust this master brick anymore ... and will order a new one.

[wehnerc]

Don't give up to early. My master is working after unbending the pin and refreshing.

It is very hard to see whether it is bended. Look at this picture:

http://www.tinkerforge.com/de/doc/_images/bricklet_connector_short_circuit.jpg

[wehnerc]

Forgot to say. Use a magnifier glas.

[rwblinn]

(Sorry for late reply) Indeed found total 4 pins bend in two slots. After unbending, the Master Brick is still not reacting. 2 pins look rather dark - think are burned.

Will not pursue with this Master Brick.

 

Many thanks for the hint. Appreciated.

[photron]

That's one of the reasons we are switching the Bricklet connector to a different connector that doesn't have this kind of free standing pins.