OTA of ESP8266-07 (1M flash) after commit 6 days ago

[Gulaschcowboy]

Hi Marvin,

the OTA of my ESPs 07 (1M flash, 512K SPIFFS) doesn't work anymore after your commit 6 days ago. Before it was possible. Now it fails with serial output like:

Receiving OTA payload (349680/349680)... �� OTA failed

So the ~350K actually should fit into the SPIFFS What do you think, are the program/flash sizes getting to small for OTA Updates? My NodeMCUs with 4M/3M SPIFFS can be updated...

Thank you, Alex

[marvinroger]

Look at the files this PR change: https://github.com/marvinroger/homie-esp8266/pull/174

Just add this:

String error();
Update.printError(error);
_interface->logger->logln(error);

after _interface->logger->logln(F("✖ OTA failed"));

And you'll see the actual error, which will tell you what the problem is. I indeed think the flash size is getting too small.

[Gulaschcowboy]

Thanks, I tried: diff.txt

But it throws a compile error, see compile_error.txt As I am not a coder, I cant really resolve it myself. Sorry.

Flash limitation of the ESP 07 versus Homie's OTA would really be a bad showstopper for me using homie. I chose the 07 because of it's external antenna, as I'm monitoring my remote beehives with it. As it is remote and under a bee hive, you don't wanna sit there with your laptop flashing it. Bees don't like serial flashing.

[Gulaschcowboy]

OK I just saw now, that you committed changes again. After git pull some errors less: compile_error.txt

[marvinroger]

My bad, add at the top of BootNormal.hpp: #include <StreamString.h>

Ans replace the code I told you to add by this one:

StreamString error;
Update.printError(error);
_interface->logger->println(error);

[marvinroger]

If your issue is indeed space, the solution is pretty simple: lower your SPIFFS size.

The OTA does not flash the sketch to the SPIFFS. The SPIFFS is not touched during an OTA update. You said 1M flash, 512K SPIFFS, so there's 512K for SPIFFS and 1024-512 = 512K for program space. If the sketch is 350K, there's only 512 - 350 = 162K available for an OTA, which is not enough. If you don't use SPIFFS in your program, select the 1M (64K SPIFFS) preset. Therefore, you have 1024 - 64 = 960K for program space (which is enough for the UI bundle and the config file). If your current program is 350K, then there are 960-350 = 610K available for an OTA. Which is enough!

This is a simplified schema, of course, but you get the idea.

[Gulaschcowboy]

Hi Marvin, yes, that was the case: ✖ OTA failed ERROR[4]: Not Enough Space OK, I got it. I thought the OTA is saved within the SPIFFS, but I was wrong. Will give it a shot!

Thanks man!

[Gulaschcowboy]

Thank you, it works.