Comments on: ESP32 Useful Wi-Fi Library Functions (Arduino IDE) https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/ Learn ESP8266, ESP32, Arduino, and Raspberry Pi Mon, 16 Mar 2026 13:03:18 +0000 hourly 1 https://wordpress.org/?v=6.8.5 By: Sara Santos https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-1169428 Mon, 16 Mar 2026 13:03:18 +0000 https://randomnerdtutorials.com/?p=101782#comment-1169428 In reply to stefano.

You can use this example sketch: https://raw.githubusercontent.com/RuiSantosdotme/Random-Nerd-Tutorials/master/Projects/ESP32/ESP32_WiFiScan.ino

]]> By: stefano https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-1165465 Sun, 01 Mar 2026 16:53:05 +0000 https://randomnerdtutorials.com/?p=101782#comment-1165465 hi
I have some devices connected to a router
i would like to scan the signal strength of those devices

regards
stefano

]]> By: Sara Santos https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-1120697 Sat, 08 Nov 2025 11:08:34 +0000 https://randomnerdtutorials.com/?p=101782#comment-1120697 In reply to John.

Hi.
I tried to compile the program and it is compiling fine as expected.
Which version of the ESP32 core do you have installed? You can check it in Tools > Boards > Boards Manager > ESP32. My version at the moment is esp3 by Espressif Systems version 3.3.2.

Regards,
Sara

]]> By: John https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-1120543 Sat, 08 Nov 2025 04:32:12 +0000 https://randomnerdtutorials.com/?p=101782#comment-1120543 Works fine with the earlier led blinking exercise but when I try to use WiFi :

Compilation error: ‘class WiFiClass’ has no member named ‘mode’

Now trying to run Arduino IDE version 2.3.6 with ESP32 Dev Module.

This and other more complex programs worked previously with IDE 2.1.8.19 but this version does not work any more. WiFi now superceded?

]]> By: Ken https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-1004970 Mon, 03 Feb 2025 10:32:25 +0000 https://randomnerdtutorials.com/?p=101782#comment-1004970 In reply to Sara Santos.

To be more specific… hold down the reset and boot buttons, release the reset button, then the boot button.

]]> By: Sara Santos https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-1004969 Mon, 03 Feb 2025 10:25:53 +0000 https://randomnerdtutorials.com/?p=101782#comment-1004969 In reply to sameer.

Hi.
Try pressing the ESP32 BOOT button before trying to upload the code.
Close any other Arudino IDE instances and serial monitor before trying to upload the code.
Regards,
Sara

]]> By: sameer https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-1004957 Mon, 03 Feb 2025 09:49:15 +0000 https://randomnerdtutorials.com/?p=101782#comment-1004957 When i am trying to upload the code from arduino ide to esp32 nodemcu wifi board, it is showing that the board is not in download mode or board is in wrong mode. What should i do? Can anyone please help me out?

]]> By: Sara Santos https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-990221 Mon, 09 Dec 2024 21:57:24 +0000 https://randomnerdtutorials.com/?p=101782#comment-990221 In reply to Mike_MCS.

Hi.
Make sure that you have the ESP32 or ESP8266 boards installed in your Arduino IDE.
Additionally, make sure you select the right board in Tools > Board before uploading your code.
Regards,
Sara

]]> By: Mike_MCS https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-990136 Mon, 09 Dec 2024 15:00:39 +0000 https://randomnerdtutorials.com/?p=101782#comment-990136 I’ve been away from Arudion for a while, and I think I must have forgotten a lot!
I was following your sketch to get the RSSI data, but I keep getting “Wifi.h: no such file”, tried ESP8266WIFI.h, same result.

]]> By: isaa https://randomnerdtutorials.com/esp32-useful-wi-fi-functions-arduino/#comment-972088 Tue, 15 Oct 2024 05:58:39 +0000 https://randomnerdtutorials.com/?p=101782#comment-972088 In reply to Sara Santos.

hi Sara ,hi Rui
first , thank you for these tutorials, priceless
the problem i am having with esp32 WiFi connection is that unless you connect through a computer and read the ip address from serial monitor , then you dont know the address to search for
off course you can program it with an static IP as long as you use it on your network, but i am not sure what will happen if you connect it to another network
i have also found out that although my esp32 dev module is connected to Wifi and i can reach it through browser, it is hidden in the routers wifi list
recently i installed FluidNC on a similar unit and i can reach it by simply putting “FluidNC.local” in the search bar
i am wondering if a similar approach can be implemented in general
can i have your thoughts, please?
and finally why is esp32 hidden in wifi network

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