OTA or not OTA that is the question...

[Innocenzo]

@jylaxx I am looking for the same answers. I would know if it is possible write a micropython code that connect to my server, download a new version of '/flash' and replace the older.

In other words a FS Update OTA feature.

[robert-hh]

@jylaxx You can make your owh OTA mechnism for user program update, by writing a protocol that downloads a new script. You can even replace the code of the script that is actually running, even if that might not be safe. And there is machine.reset() to restart you device.

You could also use the built-in ftp server to upload new code, if the device is accessible for remote clients, even if that is not reccomendet, since the connection is not secure.

[Innocenzo]

@robert-hh Hi Robert, so I can download a new boot.py an main.py, and also add other files in /flash/lib for example, and after reset, my device running the new code right? I know that FTP is not secure, but I can enable it only during this step and change the default password XD. Now, I do some tests.

Thx

[Innocenzo]

@robert-hh Instead, the Module Firmware update can be done only through the Pycom Firmware Update Tool, right?

[off Topic] How can I increase my reputation? I can write a message only every 600 seconds and it is pesky :( .

[robert-hh]

@Innocenzo Yes, that is true. You can replace any file in the file system, but firmware and frozen bytecode can only be loaded trough an external PC. It does not have to be the Pycom updater. If you search the board for downgrade, you'll find a manual procedure, and the firmware images are all accessible, once you guess the right name. You can also install the repository and build environment to create you own images. OTA of the firmware worked in the beginning, but that stopped at about V1.

P.S.: One mechanism of increasing the reputation is being upvoted by someone else, which I just did for your post.

[bucknall]

Hi @Innocenzo,

You need a minimum of 3 reputation to post faster than once every 600 seconds. I've upvoted a couple of your posts so this should be resolved now! It's intended as a method to slow down spammers and those posting automated content.

Regarding your questions about the Firmware Update tool, this is correct. As of current, you need to use the Pycom Firmware Update tool - we're looking into bringing OTA back but at the moment we're prioritising other core features!

I'll post back here when this feature is released!

Cheers,

Alex

[Innocenzo]

@bucknall Thx a lot for everything

[Innocenzo]

@robert-hh I am sorry for the many questions, but exists something like ftplib.py that works on WiPy 2.0?

Or the better solution is to write code from the scratch?

[robert-hh]

@Innocenzo @spotlightkid has created a ftplib version that runs on esp8266 micropython. In general, that should work on wipy32 too. Maybe you have to adapt a little bit, since the two dialects are not 100% the same.
https://forum.micropython.org/viewtopic.php?f=15&t=2949&p=17523&hilit=ftplib#p17459
and
https://github.com/SpotlightKid/micropython-ftplib
If the code get's too large, you too can use pre-compiled files, or use frozen bytecode (code in flash). That however requires you to install the build environment for the firmware.

[Innocenzo]

@robert-hh I've tried this version but I've some problem on memory allocation

MemoryError: memory allocation failed, allocating 322 bytes

[robert-hh]

@Innocenzo If the code get's too large, you too can use pre-compiled files, or use frozen bytecode (code in flash). That however requires you to install the build environment for the firmware.

[jmarcelino]

@Innocenzo
a FTP client feels a bit wasteful on resources, it's a very verbose protocol with lots of old baggage. Is there a particular reason for it?

[Innocenzo]

@robert-hh There is some guide where I can learn about using pre-compiled files or froze bytecode?

@jmarcelino I want perform the FileSystem Update through micropython code. In other words I want that a function in my code can connect to a Server, download a new version of boot.py and main.py and reset the machine. With previous answers I understand that the only way to do this is through FTP.

[robert-hh]

@Innocenzo Besides that, you can always implement a simple file transfer using sockets with a few dozen lines of code.
open connection to sever
request: name_of_file
response: file_or_sorry
get data until the server closes the connection.

[robert-hh]

@Innocenzo Both mpy-cross and dfrozen bytecode require the buidl environment for WiPy (https://github.com/pycom/pycom-micropython-sigfox). I can make a mpy-cross (the pyhton cross-compiler) for you, if you tell me your OS. Then you would compile you python code on your PC, get a file with the extension .mpy and store it on the wipy, like a python script. Th ecompield file may not be much smaller, but it needs less space when loaded and does not need RAM during loading.

[jmarcelino]

@Innocenzo
It's much better if you run use a FTP client on your Server to connect to the existing FTP server running on the LoPy. (confusing sorry :) The FTP server on the LoPy is more efficient and already done in C.

Alternatively use the light weight sockets approach robert-hh suggested.

[Innocenzo]

@robert-hh Actually I use Windows 10 (if there are problems I have also a VM with Ubuntu). Thx

@jmarcelino For my purposes the Wipy must require the transfer and contact the server. I think that the socket approach is the better solution.

[robert-hh]

@Innocenzo OK. It'll take a few housr before I'm home to prepare the binaries. Linux is easy, for Windows10 I can use my Windows VM.

[robert-hh]

@Innocenzo I have placed Linux and Windows versions here:
https://github.com/robert-hh/Shared-Stuff
The versions for the pycom and micropython.org variants differ in the tag of the generated file, so take the right one.
mpy-cross --help
tells you the usage. On WiPy, the .py files take precedence over the .mpy files. If you want to run the .mpy variant, delete or rename the other version first.

[Innocenzo]

@robert-hh Thx a lot.