DevHeads IoT Integration Server•5mo 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•5mo ago

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

Boss lady•5mo 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•5mo 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•5mo ago

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

ZacckOsiemo•5mo ago

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

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

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