Repeated WiFi Scan calls only returns zero networks after about 15 minutes

[ctacke]

The new Meadow.Sample application WiFinder repeatedly calls Scan on the WiFi adapter. On my Project Lab, in my office, this returns a list of about 10 SSIDs. If I let the application just run, it does a scan about every 2.5 seconds. After 10-15 minutes of running, the list of networks that returns from Scan goes from 10 SSIDs to 0. Once it returns 0 networks, it never returns any networks again. If I reset the device it starts returning networks again.

The behavior happens on every run, so is very repeatable. It happens with the internal or external antenna seelcted.

App:
https://github.com/WildernessLabs/Meadow.Samples/tree/develop/Source/MultiPlatform/WiFinder

Firmware Versions
    OS: 1.10.0.2
    Runtime: 1.10.0.2
    Coprocessor: 1.10.0.1
    Protocol: 8

[adrianstevens]

same behavior on v1.11.0.0?

[ctacke]

1.11.1.44 is worse. I don't think scanning works at all.

Scanning for networks...
ioctl Esp32Command returned -1. Last error: OperationNotPermitted
ESP Ioctl returned non-success: 1
Error getting access points: Failure

[halyssonJr]

Thanks @ctacke, I am checking what is going on with Scan calls.