How to get a list of access points? #314
Comments
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you got an Error inside the wifi driver : |
I haven't even heard of that protocol before, so no idea.
STA mode means connecting to an existing WiFi network right? I'm not trying to do that. I'm trying to print a list of visible wifi networks without doing any connection. Like the promiscuous mode from back in the Backtrack days. Or is that not a supported use case? |
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yes you dont need to connect to anything. what i want you to do is not opening an AP mode and STA mode at the same time. you even can start in None Mode. |
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with the set_configuration method you can set it to None / Ap / sta /mixed . Please test it with None or Sta and run a scan. |
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Setting it to None didn't work, but setting it to Client mode did the trick! Thanks! |
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In any case this error still is really wired. The AP should not crash if its get something send it's not compatible with ( if that's the case here) so we would still need to dick deeper. |
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So it would be cool if you could sniff the packets you receive and check if you get something like a NAN package. I think this would be a bug in the upstream esp-idf impl |
If you want me to run some code for diagnost purposes, feel free to give me a snippet. |
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If you could do one test where you configure the EspWifi ( so you have netif running) just in AP mode - and just set a simple test ssid and pw ( rest of the config can be filled with ..default::Default) and connect with your phone ore something and see if it still crashes? |
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the only related problem on esp-idf i could find is espressif/esp-idf#12473 though also a relative new issue |
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I used the following code: fn wifi_ap() -> Result<()> {
log::info!("Setting up WiFi radio");
let sysloop = EspSystemEventLoop::take().with_context(|| "Error getting SysEventLoop handle")?;
let peripherals = Peripherals::take()?;
let nvs = EspDefaultNvsPartition::take().with_context(|| "Error retrieving default NVS partitions")?;
let mut wifi = BlockingWifi::wrap(
EspWifi::new(peripherals.modem, sysloop.clone(), Some(nvs))?,
// WifiDriver::new(peripherals.modem, sysloop.clone(), Some(nvs))?,
sysloop)?;
let wifi = wifi.wifi_mut();
log::info!("Starting Wifi");
wifi.set_configuration(&Configuration::AccessPoint( AccessPointConfiguration {
ssid: "ESP32".into(),
password: "AchtTekens".into(),
auth_method: AuthMethod::WPA2Personal,
..Default::default()
}))?;
log::info!("Starting WiFi AP");
wifi.start()?;
loop {
let netif = wifi.ap_netif();
log::info!("AP Info: {} - {:?}", netif.get_name(), netif.get_ip_info()?);
FreeRtos::delay_ms(1000);
}
}And that worked flawlessly. Could connect with my phone and it kept running: |
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hmm, so in the first case you used the mixed mode i think, have to look up the default. Could you try again with that? Thanks for testing. Maybe it was a spurious error cause we really need such a packet in the time-frame you are opening the driver and wait for something. Maybe the internal driver got in some wrong state in his state-machine, still it sounds super fishy |
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From my testing so far it doesn't matter if I use If I set it in mixed mode, it works fine. I think it's a driver initialisation error. You just have to set any configuration or it crashes. |
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Ok ty for your testing. Did it always crash with the same error? |
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Always with |
I'm new to ESP32's and as an exercise I am trying to simply print out a list of access points the wifi adapter can see.
Code here.
This is the output:
Can someone tell my why the Wifi is getting dropped and what I am doing wrong?
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