DevHeads IoT Integration Server•3mo ago

How to Interface an LDR with ESP32 and BeagleBone Black for Light Monitoring System?

Hello, I’m working on a light intensity monitoring system using BeagleBone Black and a Esp32. I’m interfacing an LDR (Light Dependent Resistor) through the Esp32 with a 4-digit 7-segment display to show light levels. Could you guys guide me through the setup, For instance how do I connect the LDR properly to the Esp32 and interface it with BeagleBone Black? This is my code below, the issue is am getting no reading from my Esp32

     int sensorValue = 0;
     void setup() {
         pinMode(A0, INPUT);
         Serial.begin(9600);
     }
     void loop() {
         sensorValue = analogRead(A0);
         Serial.println(sensorValue);
         delay(1000);
     }

     int sensorValue = 0;
     void setup() {
         pinMode(A0, INPUT);
         Serial.begin(9600);
     }
     void loop() {
         sensorValue = analogRead(A0);
         Serial.println(sensorValue);
         delay(1000);
     }

5 Replies

ZacckOsiemo•3mo ago

Question, you wrote the code before doing the connection? And why do you need those 2 huge systems?

Boss lady•3mo ago

Hey @ZacckOsiemo ,Yes, I wrote the code first to outline the basic functionality of reading the LDR values through the ESP32. It’s a common approach to draft the code early and then adjust as needed when connecting the hardware. As for using both the BeagleBone Black and ESP32, each has its strengths: the ESP32 handles real-time sensor readings and communication, while the BeagleBone Black is great for more complex processing and control tasks, like managing the 7-segment display. This setup allows each device to do what it does best, and while it may seem like a lot for a simple task, it’s scalable and can handle added complexity as the project grows. Let me know if you have any other thoughts or suggestions!

ZacckOsiemo•3mo ago

i would say you are trying to optimize and scale too early. An ESP can handle all the functionality you need and usually i start figuring out the the connections before i write code. Because for which peripheral do i write code for? Doing what? That’s stuff you sort out before you code because your code answers these questions.

Boss lady•3mo ago

Thanks @ZacckOsiemo would firmly take ur advise can u give any suggestion on how to resolve the issue on my project

ZacckOsiemo•3mo ago

get the connections, then do the code, then scale.

Gaming

Programming

How to Interface an LDR with ESP32 and BeagleBone Black for Light Monitoring System?