Last set host name shown to all the network ports while trying OTA update.

[PurushottamPawar]

I have more than 5 NodeMCUs installed at various places in my office. I am trying to update the binaries over OTA using Arduino IDE. I have set different hostnames to each of them while uploading through USB. However, when I see into Arduino IDEs Tools->Port, I find them all taking up the name of the lastly set hostname. Interestingly, the IP addresses appended are displayed properly.

My Configuration:

• Ubuntu 14.04 (64-bit)
• Arduino IDE 1.8.5
• using ArduinoOTA for OTA support

Steps to Repro:

1. Open BasicOTA Sketch
2. Change ssid, password as per your configuration
3. Set Hostname using ArduinoOTA.setHostname(hostName)
4. Connect NodeMCU using USB.
5. Select Port ( local -*tty )
6. Upload the sketch.
7. Disconnect the NodeMCU and connect it to wall plug charger.
8. Connect another NodeMCU via USB.
9. Change hostname to something else.
10. Select Port ( local -*tty )
11. Upload the sketch.
12. Disconnect the NodeMCU and connect it to wall plug charger.
13. Go to Tools->Port
14. Give it some time or restart the IDE.
15. The lastly given name will be shown to both the NodeMCUs with correct IP addresses.

I even tried with the latest hourly-build version of IDE but with no luck.
Please let me know if any more info is needed.

Thanks,
Purush

[facchinm]

Hi @PurushottamPawar ,
it's a bit strange but not totally unexpected; in fact a lot of caching happen at when we discover the network boards via mdns.
Is avahi-browse reporting the right name when that situation happens?