Comments on: ESP32 WebSocket Server: Display Sensor Readings

By: George

George — Sun, 30 Mar 2025 18:01:06 +0000

Hello. Thanks for the great project. In my case, I access the web page from the browser when the computer is connected to the network via wifi. When I connect the computer with a network cable, I cannot access the web page. The browser shows ERR_CONNECTION_TIMED_OUT. Can you help me?

By: Anthony

Anthony — Mon, 03 Mar 2025 04:53:04 +0000

Hi,
Thanks for the tutorial. It has been very helpful but I had some issues and I thought I would put up my changes for anyone else that has similar issues as it looks like there are some updates to code that make some changes necessary. Luckily, it looks like all the libraries can now be downloaded in the arduino ide now. One change is that instead of AsyncTCP its ESPAsyncTCP. These includes:
#include
#include
Change to:
#include
#include
And then this line:
if (!LittleFS.begin(true)) {
Changes to:
if (!LittleFS.begin()) {
This made the sections of code I was looking at work. YMMV as I am setting up a softAP and not using any of the BME stuff since I’m only trying to read voltage.

By: Sara Santos

Sara Santos — Thu, 23 Jan 2025 10:50:58 +0000

In reply to M. Soares.

Hi.
There’s probably something wrong with the way you edited the code.
But, without further information, it’s very difficult to find out what might be wrong.
Regards,
Sara

By: M. Soares

M. Soares — Thu, 23 Jan 2025 08:40:41 +0000

Hello

Thanks for the tutorial.
But I can’t get it to work on my setup, although it successfully compiles.
The only thing I have changed is that I removed the BME sensor (don’t have one), an replaced the calls to the sensors by fixed values. Should actually work.

I have no readings and the console is showing me that the connection was interrupted while loading.
rehost.diberie.com/Picture/Get/f/344461

Could you please give-me some hints how to debug it?

Thank you

By: Sara Santos

Sara Santos — Mon, 07 Oct 2024 08:20:58 +0000

In reply to summer.

Hi.
You can learn how to use an LCD with the ESP32 on this tutorial: https://randomnerdtutorials.com/esp32-esp8266-i2c-lcd-arduino-ide/
Regards,
Sara

By: Miroan

Miroan — Mon, 07 Oct 2024 00:23:15 +0000

Whenever I need something I stumble to your tutorial thanks to search engine, I’ve changed async lib’s to work on esp8266. Thanks a lot once again, you have best tutorials on the net!

By: summer

summer — Sat, 05 Oct 2024 01:39:59 +0000

good.
how to display the data on a LCD?

By: iwan

iwan — Fri, 04 Oct 2024 02:27:29 +0000

great job sara
god bless you

By: Michael

Michael — Fri, 21 Jun 2024 11:15:39 +0000

In reply to Stein Arve Lovik.

I know it’s a late response but I ran into the same “error” or better behavior. I checked the webpage (I’m using Firefox) using the “Website Inspector”, moved to the “Console” tab and saw that the sensor readings data was delivered to the webpage but not displayed. Then I used the “Debug” tab and clicked on the “script.js” entry on the left side (“main thread” – “192..” . script.js. On the right side you can see the content of the script. BUT: that was some old content I used half an hour before. Firefox didn’t update the script.js file and for a short test I used Chrome instead – and the sensor readings were displayed. Happy coding, Michael

By: MeisterQ

MeisterQ — Wed, 12 Jun 2024 07:15:42 +0000

Thank you very much for this tutorial.

Can you explain how to set up websockets including the port when using portforwarding?

If i forward my ESPs port 80 and websockets start on /ws, it cant receive ws data.

On browsers debug window it says an error on line Socket = new WebSocket(ws://${window.location.hostname}/ws);

Error is “WebSocket connection to ‘ws://myurlishiddentokeepprivacy/ws’ failed:”

Any idea how to set this up?