WiPy dead after connecting SafeBoot pin with VIN

[femto]

By accident I connected the SafeBoot pin with the VIN pin and now my WiPy seems to be dead.

Pressing the reset button or switching off and on of the power supply doesn't help, there's no sign of a heartbeat.

Any hints?

BR,

HD

[femto]

Ok, for some strange reason it boots now again, but SafeBoot isn't working anymore. This is really bad, since my boot script isn't working and I can't connect to it anymore.

[danicampora]

Hi femto,

Unfortunately the CC3200 in the WiPy is not 5V tolerant.

[femto]

I was favored by fortune that I had added the following lines at the top of my misbehaving script:

Code: Select all

# enable the UART on the USB-to-serial port
uart = UART(0, baudrate=115200)
# duplicate the terminal on the UART
dupterm(uart)
print('UART initialised')

So I noticed that the REPL of my WiPy was still available and alive!

Using the serial console, I just needed to execute the right commands manually to get my WiPy connected to my home WiFi again.

Yeah, bingo, we're back to work!

BR,

HD

[danicampora]

Hi!

Good to know that you found a solution for now!

[andrew]

I've just done the same thing, in my case by plugging the WiPy into the expansion board upside down. I thought it was completely dead but once some component on the expansion board cooled down again (it got burning hot) the WiPy booted. Unfortunately it seems to have shorted the safe boot pin permanently to high so everytime it starts up it's in full safe boot mode. That means no running boot.py or main.py and it always reverts to factory firmware. Luckily it does still start in AP mode so I can connect to it and run stuff but it's partly crippled due to my careless mistake.

When do you think you'll start selling them off the website?

Andrew

[danicampora]

Hi Andrew,

We will be selling them again soon. Sorry to hear about your accident...

[andrew]

Bizarrely it seems to have healed itself and now boots up normally not in safe boot mode. And just after I ordered a new one from your webshop... Oh well, two WiPys are better than one.

Andrew

[Peter.Kenyon]

I notice that there is a pyboard.bootloader() call, so if you are upgrading software then there is no need to short out any pins, maybe this should be mentioned somewhere.

[danicampora]

pyboard.bootloader()

That only works in the pyboard, not in the WiPy. Make sure to be browsing the WiPy docs:

http://micropython.org/resources/docs/e ... index.html

And not the ones from the pyboard.