MicroPython Forum (Archive)

Hi, I've tried flashing the latest esp8266 micropython firmware, and it seems thoroughly bricked. I built a new toolchain from git and the latest micropython, but now it won't boot. Moreover, I get various errors that I think weren't happening before, with "esptool.py". Even the flash_id command app...

If all nodes are connected to the same (non-esp8266) accesspoint, they should be able to talk to each other normally. I don't know if the micropython networking stack supports multicast, but you should be able to use broadcast in UDP, and the other nodes will all receive if they have an open socket ...

Hi,

It seems wrong to write a new tool which runs on Python 2; Micropython is itself based on Python3 and all new projects should surely use P3.

And you really want to fix that echoing bug.

Mark

Probably some kind of downloader which downloads new files into a subdirectory in the fs, e.g. "new.d" or something. Then after all downloads are complete and confirmed, then rename the files. Otherwise, you'd risk "bricking" the device on an OTA update if it fails half way (or, say, the power fails...

The microcontroller does not have a multitasking operating system, so it's ok to enter a busy-waiting loop checking the sockets and anything else that needs checking. You can do that under an OS (e.g. Linux) too, but it uses CPU time that other tasks could use, which is why it's generally discourage...

I think the problem is that the Micropython boards don't have USB controllers, either host or device. This will cause a problem trying to talk USB. The USB port on the board goes directly into a usb-serial chip attached to the uart, so it's not a USB port which can be controlled by the gadget. There...

Soldering on female headers is certainly a good idea. I'd recommend you find your local hackspace, where you'll probably find someone who can help. Be very careful with boards which only support 3.3v - don't feed 5v into the inputs, otherwise you may let the "magic smoke" out i.e. destroy your chip....

In the latest version of the SDK, release notes, it says they (Expressif) have apparently fixed this issue:

" The ESP8266 maybe reset if connected to a special router."

http://bbs.espressif.com/viewtopic.php?f=46&t=2198

This could well be the same thing, and for micropython bug #1946

It does not appear to be the strlen() issue. I think it's probably the same as #1946. The strlen() issue did overrun the buffer, but usually only by a few bytes and not into an illegal area of memory, so I don't think it often caused a problem (except for returning incorrect data, of course). Plus t...

Hi, My device is crashing and rebooting, although not very often, possibly inside the scan() function. I can't reproduce this when it's just sitting at home, it obviously happens in certain geographical locations more than others. Perhaps there is a bad wifi packet which is killing it. Perhaps a som...