"Discover Child on Network" feature doesn't work

[pieqq]

Hello and thanks for developing this app!

I tested it and found a few issues.

App/devices info

ProtectBabyMonitor v0.3 (downloaded from F-Droid)
Devices:

• Samsung Galaxy S7 edge (Android 8.0.0)
• Oneplus One (Android 6.x)

Both devices are connected to the same network.

Steps

1. Start the app on both devices (Samsung = parent device, Oneplus = child device)
2. On the parent device, click Discover Child on Network

Expected result

The child device is shown.

Actual result

Nothing shows up, no matter how long I wait.

Additional information

The Select Child by Address works fine.

I have another Samsung Galaxy S7 edge (also running Android 8.0.0). If I replace the child device (Oneplus One) with this Samsung Galaxy S7 edge and set it to be a child device, I still cannot see it when clicking Discover Child on Network.

Please let me know what kind of logs I can attach, and how (I'm pretty tech-savvy but I'm not very familiar with Android development).

[pieqq]

Hmmm... after retrying tonight, with the same devices, it works! I can now see the child device by clicking on Discover Child on Network. Marking as closed.

[brarcher]

The discovery works by using the mDNS library in Android (though it is called something else). I've seen that the library is a bit finicky in the past, so I would not be surprised if sometimes it does not work. If the issue happens again you are welcome to grab adb logs and I can take a look.