Arduino OTA and macOS Big Sur: [ERROR]: No response from device

[zeitwesen08_15]

Hi Forum,

I'm using Arduino OTA to update the firmware on an ESP8266 microcontroller.
Therefor I use the espota.py script in this way on a 2019 macbook pro with latest macOS Big Sur 11.1 (20C69)

python espota.py -d -r -i 192.168.5.157 -p 8266 -P 9099 --auth="my-own-ota-password" -f path/to/compiled/binary.bin

and it gives me:

09:22:55 [DEBUG]: Options: {'esp_ip': '192.168.5.157', 'host_port': 9099, 
'image': 'binary.bin', 'host_ip': '0.0.0.0', 
'auth': 'my-own-ota-password', 'esp_port': 8266, 'spiffs': False, 
'debug': True, 'progress': True}
09:22:55 [INFO]: Starting on 0.0.0.0:9099
09:22:55 [INFO]: Upload size: 3876
09:22:55 [INFO]: Sending invitation to: 192.168.5.157
Authenticating...OK
09:22:55 [INFO]: Waiting for device...
09:23:05 [ERROR]: No response from device

So basically it starts negotiating the upload but then the ESP8266 can not connect back to (static) port 9099 on the host. I already checked the macOS Firewall. It does not work when disabled, nor does it work when enabled (when enabled the firewall adds a rule for Python.app to "Allow any incoming connections".
My macOS uses python 2.7.16.

I tried the same python script with the same binary on my linux-box on the same network and it worked instantly. That is why I expect it to be a macOS problem and not a network-firewall and/or arduinoOTA source problem. Last time I tried the same procedure on the same macBook was about half a year ago, of course then with the predecessor of Big Sur.

Anyone have some hints about how to solve the problem?

[Ballscrewbob]

Simply do a search (upper right of the screen) for bigsur and you will find a few results and answers.

Could you also take a few moments to Learn How To Use The Forum.

Other general help and troubleshooting advice can be found here.
It will help you get the best out of the forum in the future.

[zeitwesen08_15]

thanks @ballscrewbob already did that with no luck so far. Seems to be an issues nobody on Big Sur had so far.

It basically seems to have to do with the macOS network layer (see Arduino Forum) and its firewall - not so much with Arduino itself as with the same scripts and setup it works on my linux-box right away.

[unkaktus]

Hi @zeitwesen08_15!

Turns out it is exactly because of the macOS firewall. I used Big Sur for a while now, and didn't have any issues with espota there. Recently, I have noticed that my firewall is turned off and so I toggled it back on. Then all of the sudden I've got this issue. Turned off my firewall and it all got back up.

TL;DR: System Prefrerences -> Security & Privacy -> Firewall -> Turn Off Firewall.