OTA or not OTA that is the question...
-
Could an image be downloaded to the WiPy and copied to an 8266? Then the helper chip could reset the WiPy, hold pin 23, feed the update, and reset it again.
If you capture the bytes from a serial port of a successful flash you could then replay that exact sequence from the helper board and no need to program much logic into it. Simply reset, pin 23, stream the prerecorded flash session, reset.
-
@BetterAuto
You have to be running an image with the modified boot loader flashed via the normal serial process before you try OTA, otherwise the code will overwrite itself during the FTP and cause a crash.
-
Ok but you see the file won't even upload. I'm able to upload only about 1/4 of appimg.bin and it dies. But since you said it's not ready I'll wait.
-
@BetterAuto In order to uplod the full appimg.bin you must bulid the environment and edit the bootloader. (Actually the size for the appimg is fixed to 1MB). After that you can upload the entire file appimg.bin using FTP. Anyway, I do some tests and after the upload of the appimg.bin file in the sys folder nothing change. In other words OTA doesn't work also if you upload the full image on sys folder.
-
I'm trying OTA over FTP, is this still non-functional? I'm able to upload only about 1/4 of appimg.bin and it dies.
This is what I see on the console when it dies. Here, I am going from 1.4.0.b1 to 1.6.0.b1 on a WiPy 2.0.
Also could someone please upvote me as well? Grin
Guru Meditation Error of type IllegalInstruction occurred on core 0. Exception was unhandled. Register dump: PC : 0x40188c04 PS : 0x00050930 A0 : 0x80096671 A1 : 0x3fff2730 A2 : 0x3ffced9c A3 : 0x3ffc1dec A4 : 0x40188603 A5 : 0x00000000 A6 : 0x00000000 A7 : 0x0000012e A8 : 0x80188600 A9 : 0x3fff2710 A10 : 0x3ffc1dec A11 : 0x00060923 A12 : 0x00060920 A13 : 0x00000002 A14 : 0x00000fdb A15 : 0x00060023 SAR : 0x0000001a EXCCAUSE: 0x00000000 EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0x00000000 Backtrace: 0x40188c04:0x3fff2730 0x40096671:0x3fff2750 0x4009824e:0x3fff2770 0x40099fa2:0x3fff2790 Rebooting...
-
@Innocenzo I just gave ftplib a try.
- the uncompressed python script does not load
- the cross-compiled python file loads and works well
- a minified python script loads too and works well.
Since the minified version is not really readable too and requires an PC pre-process step, the compiled version is preferred. You could also compile the minified version, which gives the smallest footprint (about 11k). (get minify with pip install minify)
I would still try to use my own little loader, since that gives you full control. The only disadvantage is, that you have to implement both client & server.
-
@robert-hh Thx a lot.
-
@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 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 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.
-
@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 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.
-
@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 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.
-
@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 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.
-
@robert-hh I've tried this version but I've some problem on memory allocation
MemoryError: memory allocation failed, allocating 322 bytes
-
@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.
-
@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?
-
@bucknall Thx a lot for everything
