Comments for Random Nerd Tutorials

Comment on ESP32 Web Server with MPU-6050 Accelerometer and Gyroscope (3D object representation) by Jessica

Jessica — Wed, 30 Jul 2025 01:34:58 +0000

In reply to Jessica. hey! So i got it fixing if anyone has the same problem uh its just scyning and takes time thank you Sara Santos for the libraries help good day

Comment on ESP32 CYD with ESP-NOW: Receive and Display Data From Multiple Boards by Bryan Staines

Bryan Staines — Tue, 29 Jul 2025 16:43:30 +0000

Hi Sara
I’m fairly new to this game so might need a bit of hand holding!
I get the following when compiling the code:

C:\Users\44784\AppData\Local\Temp.arduinoIDE-unsaved2025629-20436-411cb1.v10f6\sketch_jul29a\sketch_jul29a.ino: In function ‘void setup()’:
C:\Users\44784\AppData\Local\Temp.arduinoIDE-unsaved2025629-20436-411cb1.v10f6\sketch_jul29a\sketch_jul29a.ino:78:29: error: invalid conversion from ‘void ()(const uint8_t, esp_now_send_status_t)’ {aka ‘void ()(const unsigned char, esp_now_send_status_t)’} to ‘esp_now_send_cb_t’ {aka ‘void ()(const wifi_tx_info_t, esp_now_send_status_t)’} [-fpermissive]
78 | esp_now_register_send_cb (OnDataSent);
| ^~~~~~~~~~
| |
| void ()(const uint8_t, esp_now_send_status_t) {aka void ()(const unsigned char, esp_now_send_status_t)}
In file included from C:\Users\44784\AppData\Local\Temp.arduinoIDE-unsaved2025629-20436-411cb1.v10f6\sketch_jul29a\sketch_jul29a.ino:7:
C:\Users\44784\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.5-b66b5448-v1\esp32/include/esp_wifi/include/esp_now.h:185:54: note: initializing argument 1 of ‘esp_err_t esp_now_register_send_cb(esp_now_send_cb_t)’
185 | esp_err_t esp_now_register_send_cb(esp_now_send_cb_t cb);
| ~~~~~~~~~~~~~~~~~~^~
exit status 1

Compilation error: invalid conversion from ‘void ()(const uint8_t, esp_now_send_status_t)’ {aka ‘void ()(const unsigned char, esp_now_send_status_t)’} to ‘esp_now_send_cb_t’ {aka ‘void ()(const wifi_tx_info_t, esp_now_send_status_t)’} [-fpermissive]

I have installed:
ARDUINO ESP32 BOARDS by ARDUINO v 2.0.18-arduino .5
esp32 by Espressif Systems v 3.3.0

Any help would be greatly appreciated, thank you
Bryan

Comment on ESP32-CAM Remote Controlled Car Robot Web Server by Ramon

Ramon — Tue, 29 Jul 2025 15:43:08 +0000

In reply to eric coller. Good afternoon, I'm trying to do the same thing as you. Can you share your setup? Thanks.

Comment on ESP32 Web Server with MPU-6050 Accelerometer and Gyroscope (3D object representation) by Jessica

Jessica — Mon, 28 Jul 2025 17:21:22 +0000

In reply to Sara Santos.

Oops, yah your right. I messed up.
I have another question idk if you could answer or not.

So basically, I wanted to tweak the website, but whenever I do, littleFS no longer works and I get an error message. Is there a reason for this? I use VS Code to edit the HTML files. Do I need to use PlatformIO for that then?

Comment on ESP32 HTTP GET and HTTP POST with Arduino IDE (JSON, URL Encoded, Text) by Peter

Peter — Mon, 28 Jul 2025 16:45:35 +0000

for newest library this line of code is obselute:
http.begin(serverPath.c_str());
so i used:
http.begin(wifiClient, serverPath); // Initialize with full URL
where serverpath is http://192.168.1.107/get-esp-data.php?apikey….
i also used some debug lines in code bellow which helped for solving the -1,404 code.
Lot of issues in php code, xampp server , code in arduino from my changes. One more problem is that you need to be connected to the same wifi network ( xampp, lampp + esp).
i did used another way of a code but maybe it helps somebody.
void upload() {
if (WiFi.status() != WL_CONNECTED) {
Serial.println(“WiFi Disconnected”);
return;
}
//ip address of a server
Serial.println(“Connecting to: ” + String(serverName));
//ip adress of a esp
Serial.println(“STA IP: ” + WiFi.localIP().toString());

// Create the server path
String serverPath = String(“http://”) + serverName +
“?api_key=” + apiKeyValue +
“&data=” + data +
“&data2=” + data2 +
“&teplota=” + temp;

HTTPClient http;

int httpResponseCode = http.GET();
Serial.println(“HTTP Response code: ” + String(httpResponseCode));

if (httpResponseCode > 0) {
String payload = http.getString();
Serial.println(“Payload: ” + payload);
} else {
Serial.println(“Error: ” + http.errorToString(httpResponseCode));
}

http.end(); // Free resources
}

firstly use get method for test and then go to post. It will help you. Also some easy code from start – test it step by step. othervise you will be lost – as me 🙂

great tutorial. Helped me 2-3 years ago. Helped me now

Comment on ESP32 HTTP GET and HTTP POST with Arduino IDE (JSON, URL Encoded, Text) by Peter

Peter — Mon, 28 Jul 2025 16:35:05 +0000

In reply to Uziel. there could be a very wide range of a issues. ai helped me. generally you need to check everything.

Comment on ESP32 CYD with LVGL: Weather Station (Description, Temperature, Humidity) by Lukasz

Lukasz — Mon, 28 Jul 2025 16:31:27 +0000

Is it possible to add a second screen with the weather forecast for 3 days ahead so that the screens change every 5 minutes?

Comment on Node-RED with Raspberry Pi Camera (Take Photos) by Dusan

Dusan — Mon, 28 Jul 2025 15:28:16 +0000

No longer valid in 2025

Comment on Getting Started with the ESP32-C3 Super Mini by Sara Santos

Sara Santos — Mon, 28 Jul 2025 10:24:35 +0000

In reply to Reini44.

Hi.
Thanks for pointing that out.
I’m sorry for the mistake in the code. It is fixed now.
Regards,
Sara

Comment on Getting Started with the ESP32-C3 Super Mini by Sara Santos

Sara Santos — Mon, 28 Jul 2025 10:19:30 +0000

In reply to Ed.

Thanks for sharing.
Regards,
Sara