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Vincent , 04-19-2025, 01:46 PM

Hey everyone, I’m working on an IoT-based project where I’m using the following components:

2 IR sensors (one for RPM measurement, one for obstacle detection)

L298N motor driver

30 RPM DC motor

ESP32

GPS module (NEO-6M)

Buzzer

Increment/Decrement buttons

LCD display with I2C module

My project goal is:

When the vehicle is moving at a normal speed, and it approaches a restricted zone like a school or hospital (within 500 meters), the buzzer should alert.

Once it enters the restricted zone, the vehicle’s speed should automatically reduce to a predefined limit.

After exiting the restricted zone, the speed should return to the previous level.

Additionally, if the vehicle detects an obstacle, it should stop immediately.

The motor’s real-time RPM should be displayed on the LCD.

The speed can be set using increment and decrement buttons.

We can be determined the restricted zones with the help of gps.

I want to create a prototype but i couldn't able to do that....I dont know how to code ...could anyone figure it out for me.

Also I asled chatgpt for the help it did give me a solid circuit cinnection but it couldnt figure out the code ..

QDrives , 04-19-2025, 03:27 PM

"*I dont know how to code*" -- you are not showing anything coming close to coding. It seems more that you have difficulty creating the schematic?
For speed detection of motors it is better to used a incremental encoder with quadrature output.
What is the motor used for anyway?

Mr. Nerdy , 04-20-2025, 03:59 AM

I can help you

Vincent , 04-20-2025, 06:08 AM

basically its a prototype. the motor used to measure speed of the vehicle

Mr. Nerdy , 04-20-2025, 09:39 AM

you can just use tachometer to read the speed. using motor as sensor have errors and require calibration

QDrives , 04-20-2025, 01:39 PM

Can't you use the GPS to measure the speed?