Comments on: ESP32 Web Server: Display Sensor Readings in Gauges

By: Sara Santos

Sara Santos — Sat, 08 Mar 2025 06:20:03 +0000

In reply to Klaus.

Hi.
It may also help taking a look at this: https://rntlab.com/question/solvedassert-failed-tcp_alloc-idf-components-lwip-lwip-src-core-tcp-c1851-required-to-lock-tcpip-core-functionality/
Regards,
Sara

By: Klaus

Klaus — Fri, 07 Mar 2025 11:48:02 +0000

Oh, sorry. Mein Fehler. Habe gerade noch einmal geschaut und festgestellt, dass dass es noch eine AsyncTCP neben der AsyncTCP-Master gab. Diese wurde vermutlich beim compilieren gezogen. Habe die AsyncTCP gelöscht, neu compiliert und? Es funktioniert!!
Vielen Dank für die tolle Arbeit!!!

Gruß Klaus

By: Klaus

Klaus — Fri, 07 Mar 2025 11:37:31 +0000

Hallo,
sieht alles sehr gut aus, nur funktioniert es bei mir nicht ganz. Das Board ESP32-CAM startet mit folgender Fehlermeldung immer wieder neu. Habe auch den ESPAsyncWebserver und die AsyncTCP aus dem ZIP Archiv verwendet. Sorry, habe die Anleitung akribisch abgearbeitet. Nun scheitere ich doch. Was habe ich bitte falsch gemacht?

Connecting to WiFi …192.168.13.60
LittleFS mounted successfully

assert failed: tcp_alloc /IDF/components/lwip/lwip/src/core/tcp.c:1851 (Required to lock TCPIP core functionality!)

Backtrace: 0x400826dd:0x3ffb1fe0 0x4008f225:0x3ffb2000 0x400955f6:0x3ffb2020 0x400f7fff:0x3ffb2150 0x400f8179:0x3ffb2170 0x400d61f4:0x3ffb2190 0x400dcf35:0x3ffb21e0 0x400d2e7b:0x3ffb2200 0x400e3737:0x3ffb2270 0x4008ffa2:0x3ffb2290

By: Doug

Doug — Thu, 06 Mar 2025 23:28:37 +0000

Everything running well THANKS SARA,!

My question today is when I changed the max and min values to different than download, with major ticks at say 0-10-20 and changed the highlite coloring scale, that at say- scale value “10” , the highlite coloring 0-10, 10-20 changes color at say “13” and not at 10. I would have thought both would coincide together. Seems max and min are in sync. It’s the same with 0 (no) small ticks.

By: Doug

Doug — Thu, 06 Mar 2025 23:28:06 +0000

Everything running well THANKS SARA,!

By: Vlad

Vlad — Mon, 03 Feb 2025 09:51:33 +0000

Thanks, great project! Gauges arrows work well but the “numbers” don’t work.

script.js
135 var myObj = JSON.parse(e.data); // work were well, but next step mistake
137 gaugeTemp.value = myObj.temperature;// gaugeTemp.value=const (dont change)
138 gaugeHum.value = myObj.humidity; // gaugeHum.value=const (dont change)

By: Sara Santos

Sara Santos — Fri, 27 Dec 2024 15:15:48 +0000

In reply to Malcolm.

Hi.
To insert values/thresholds on the web page, you can read the following:
– https://randomnerdtutorials.com/esp32-esp8266-thermostat-web-server/
– https://randomnerdtutorials.com/esp32-esp8266-input-data-html-form/

If you want access via a web page without internet, you need to set an access point and save the javascript library on the ESP32 filesystem.

Regards,
Sara

By: Malcolm

Malcolm — Fri, 27 Dec 2024 14:26:00 +0000

Interesting project. I currently have a project that controls the heating in (upto) 8 reptile enclosures. Its based on an Arduino Mega, and uses DS18B20 sensors. But reading this project would love to try and port the code to an ESP32Dunio, and use the same sensors mentioned here as having humidity readings would be an advantage. However the main issue is making the project two way and allow the user (me) to set the target values for each enclosure on a web page and have that data sent to the ESP32. If anyone has any pointers to tutorials that I can read / use it would be helpful, but the main requirement is the same as JB mentioned above, that the “website” runs locally on the ESP, which connects to my home network but doesn’t use internet access.

By: Dom

Dom — Sun, 08 Dec 2024 02:57:57 +0000

Sara,
Is there a tutorial you can point me to, about adding more than one ESP server/sensor (to show multiple readings/gauges on app, or scroll thru each gauge)

By: Doug

Doug — Mon, 02 Dec 2024 12:13:34 +0000

Saw it, thanks Sara