ESP32 scan class help needed

Using Arduino Project Guidance
1

I am trying to use scan class for ESP32. My goal is to scan for specific ssid only. Following is the relevant code I am using:

#include <WiFi.h>
#include <esp_wifi.h>

const char* ssid = "ESP";
int apChannel = 7;

void setup() {
  
  //int16_t scanNetworks(bool async = false, bool show_hidden = false, bool passive = false, uint32_t max_ms_per_chan = 300, uint8_t channel = 0, const char * ssid=nullptr, const uint8_t * bssid=nullptr);
  int n = WiFi.scanNetworks(true, false, false, 300, apChannel, ssid);
  
}

void loop() { }

I get error message in arduino IDE:
no matching function for call to 'WiFiClass::scanNetworks(bool, bool, bool, int, int&, const char*&)'

I need help please.

Thanks.

2

It looks like yet another library is needed. Check what WiFi.h needs!

3

Isn't parameter 'apChannel' supposed to be a pointer?

4

@Railroader You were right I added the library needed. Thanks.
@anon57585045 I have no problem using apChannel as it is but error is generated only whe I pass ssid varible.

Thanks.

5

Great! Thanks for telling!
During the time as professional many large and sophisticated systems came in my way. Intuition, general thinking,... worked.
Nice being able to contribute here.

6

@Railroader My problem is still not solved. Do you have any suggestions?

Thanks.

7

Shit. I thought it pulled the plug.

What does the current block look like?

8

take a look at WiFiScan.h

9

@horace That's where I got the below line:

//int16_t scanNetworks(bool async = false, bool show_hidden = false, bool passive = false, uint32_t max_ms_per_chan = 300, uint8_t channel = 0, const char * ssid=nullptr, const uint8_t * bssid=nullptr);

How do I get rid of error mentioned in first post.

Thanks.

10

looking at the version of WiFiScan.h installed on my PC its declaration is

   int16_t scanNetworks(bool async = false, bool show_hidden = false, bool passive = false, uint32_t max_ms_per_chan = 300, uint8_t channel = 0);

5 parameters - clearly there are different libraries around

11

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