I got recently a lot of strange problems:
My Arduino IDE did only display sporadically a few of the ~twenty connected ESP8266 devices as OTA candidates I have.
And once I found a match to upload, it seemed to upload, but did not.
My dashboards in the cloud displayed erratic results.
After a long troubleshooting, I finally found the very cause:
What is not supposed to happen, happened: two of my ESP devices had the same MAC-Address !
The manufacturer is supposed to guarantee that the MAC address of an ESP device is unique?
It was not !
Isn't Espressif is supposed to guarantee that the MAC address of an ESP device is unique?
It was not !
So, if your System is playing crazy and you can’t figure the cause: think to verify that you really have unique ESP MAC-Addresses in your network.
I suppose some routers will report the conflict, my AVM Fritzbox router (a reputable brand) did not…
Regards
Laszlo
A lot of strange problems... 2 ESP8266 with duplicate MAC addresses !
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Re: A lot of strange problems... 2 ESP8266 with duplicate MAC addresses !
You can assign a new MAC address to avoid duplicates.
Re: A lot of strange problems... 2 ESP8266 with duplicate MAC addresses !
It will not be permanent.
I just marked that device for use elsewhere in another network.
Re: A lot of strange problems... 2 ESP8266 with duplicate MAC addresses !
You are not the first to find Duplicate MAC addresses!
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