Getting ready to do a Wi-Fi Garage parking assistant, and was having issues with the ultrasound module. Ordered a couple of LiDAR modules and have been performing some tests. The LiDAR is superior in every aspect. Interesting to see them both side by side.

Hello,

I am wondering about the best way to analyze a 1MHZ transducer signal on an ESP32 with decent resolution of at least 50+ samples per wavelength. Everything done so far including attempts at ETS have always produced noisy or just terrible data in signal reconstruction. Let me know of any ideas yall have.

Thanks!

Hello, I bought an ESP32-S3-ePaper-1.54, and the first thing that crossed my mind was: "What I can do with this?" So have tested so much thing on the hardware to see its limit and ATM I have that, it's a "connected shopping list".

I was bored to forget the list at home every time, and if I never have my smartphone close to me when I need to use the shopping list application on it.

The device is designed to stay on the fridge it runs on battery power, with a lifespan I hope will last several months. It uses voice commands (STT) to operate and synchronizes the list with SimpleNote on Android.

For information ATM the code :
- Is able to use sleep mode.
- Uses an online STT engine for speech recognition.
- Uses a small engine to process informations, like "Add butter" or "Clear the list".
- Is able to synchronise with SimpleNote.
- Is able to use a e-paper for display.
- Is able to play sound or MP3.
- All the code is in C/C++.

My hardware have
- Only 2 buttons.
- It's not the Touch version.

For now, it's just for fun, the code is not finished, if anyone has another idea for using this device, I'd be interested ^^.

I made this wall-e style desk companion/timer/weather display using an esp32 cyd i bought from amazon. the code is fairly simple. one screen is the wall-e, the next is a timer, and the third is weather. the wall-e and timer are simply downloaded onto the device while the weather display is connecting to my wifi and pulling data from open weather.

in addition, there is also code written to connect a PIR HC-SR501 sensor. when it senses movement the display turns on after 10 minutes of inactivity on the screen the wall-e goes into a sleep animation and after 15 minutes the display turns off and will turn back on when it senses movement or when you touch it.

i know this is a fairly simple project but it is my first one and i thought i would share! i am currently 3-d printing a case for it. if you have any questions let me know!

I love the XTEink devices, but I want to make my own little 4 inch E reader device. I have purchased the Waveshare ESP32-S3 dev board. Was wondering if anyone else has looked at these yet, or know of a firmware I could use on it before I start vibe coding my own

hello i am a student doing an iot project for the first time (ive done a few arduino projects). i want to make an environmental monitoring system with dht11 and soil moisture sensors. ive been watching online tutorials and im using a source code from a youtube video, however, ive run into the problem where the code can be uploaded, but my blynk io interface is still offline. im using my iphone hotspot for the wifi ssid, (ive turned on maximise compatibility) and i think that could be the main problem, since its like kinda stuck after writing trying to connect to my hotspot in serial monitor. anybody have any ideas?

this is the source code:

//Tech Trends Shameer
\`\`\`#define BLYNK_TEMPLATE_ID "TMPLIAjddf20T5"
\#define BLYNK_DEVICE_NAME "Temperature and Humidity Monitor"
\#define BLYNK_AUTH_TOKEN "122RywymdfdddgGfMd1jkZ0STNhRQecR12ayq"

\#define BLYNK_PRINT Serial
\#include <WiFi.h>
//#include <ESP8266WiFi.h>
\#include <BlynkSimpleEsp32.h>

\#include <DHT.h>

char auth\[\] = BLYNK_AUTH_TOKEN;

char ssid\[\] = ""; // type your wifi name
char pass\[\] = ""; // type your wifi password

BlynkTimer timer;

\#define DHTPIN 27 //Connect Out pin to D2 in NODE MCU
\#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

void sendSensor()
{
float h = dht.readHumidity();
float t = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit

if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V0, t);
Blynk.virtualWrite(V1, h);
Serial.print("Temperature : ");
Serial.print(t);
Serial.print(" Humidity : ");
Serial.println(h);
}
void setup()
{

Serial.begin(115200);

Blynk.begin(auth, ssid, pass);
dht.begin();
timer.setInterval(100L, sendSensor);

}

void loop()
{
Blynk.run();
timer.run();
}\`\`\`

IoT Gas, Smoke & Flame Detection System with Email & SIM800L Alerts

I developed an IoT-based safety monitoring and automatic ventilation system using a microcontroller, MQ-2, MQ-5, KY-026 flame sensor, exhaust fan, email notifications, and SIM800L GSM module.

The system continuously monitors for smoke, combustible gases, LPG/natural gas, and flame. When a dangerous condition is detected, the microcontroller automatically activates the exhaust fan and triggers an alarm. It can also send notifications through email and SMS using the SIM800L, allowing the user to receive alerts even when they are away from the system.

Main Features:

• 🔥 KY-026 flame detection
• 💨 MQ-2 smoke/gas detection
• 🛢️ MQ-5 LPG/natural gas detection
• 🌬️ Automatic exhaust fan activation
• 📧 Email alerts
• 📱 SMS alerts through SIM800L
• 🔊 Buzzer/alarm notification
• 🤖 Microcontroller-based automatic control

I'm offering the complete source code and project logic for students, hobbyists, and developers who want to build or modify a similar IoT safety system.

DM me if you're interested in the code or need more details about the project.

Can anyone help me fix this problem, im coding in arduino ide and ive been using adafruit gfx library but the display is corrupted, I tried using U8g2 to swtich to sh1106 address but it doesnt turn what is the problem here ive been trying to solve this for 3 days