Dyah Setyaningsih: Difference between revisions

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Revision as of 11:39, 16 February 2025

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→‎Wiring Diagram: and add codes

Dyah

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 This project is called "'''Respiring Reflections'''", a bubble machine which is connected to Pothos plants (''Epipremnum aureum'') in an enclosed environment. Read below to follow the process and the story behind the making of this project.
-//TODO: add gif/video<gallery mode="packed" heights="150">
+//TODO: add gif/video<gallery mode="packed" heights="200">
 File:Respiring Reflections image 1.png
 File:Respiring Reflections image 2.jpg
@@ Line 46: / Line 46: @@
 === Wiring Diagram ===
-[[File:The_Plant_Plant_-_Bubble_Machine_Wiring_Diagram.png|none|thumb|350x350px]]
+[[File:The_Plant_Plant_-_Bubble_Machine_Wiring_Diagram.png|none|thumb|450x450px]]
 During the process of making the bubble machine, unfortunately I fried my ESP32... I'm still not sure why, but perhaps it was due to false wiring. Thus I made this wiring diagram so that the wiring could be clear. I tried some free tools to make wiring diagram, such as but in the end I stick with EasyEDA to make this. The wiring diagram helps me a lot in reproducing the wiring I wanted to do, as well as to ask opinion from Christian or someone else for consultation.
 Since I wanted this installation to be a standalone one, I powered the ESP32 with the power suppy of 12 volts, through a buck converter of 5 volts, 1 Ampere. For this, I went to an electronics store in Erfurt (Bastlerland) and showed my wiring diagram for this project. The guy in that store recommended me this solution and I followed it.
-=== Code ===
+=== Codes ===
 To program the ESP32, I used Visual Studio Code with PlatformIO extension. Here are the codes I uploaded to the ESP32 to run the bubble machine:
+===== Bubble machine =====
 '''main.cpp:'''<syntaxhighlight lang="cpp">
 #include <Arduino.h>
@@ Line 160: / Line 161: @@
 	waspinator/AccelStepper@^1.64
 	wifwaf/MH-Z19@^1.5.4
+</syntaxhighlight>
+===== Calibration =====
+To determine the thresholds for my bubble machine, I uploaded a calibration script to the ESP32 and let the CO<sub>2</sub> sensor run in the enclosed plants' casing for minutes until the values are somewhat "stable" and not deviating too much from the previous ones:
+'''main.cpp:'''<syntaxhighlight lang="cpp">
+#include <Arduino.h>
+#include "MHZ19.h"
+#include <HardwareSerial.h>
+#define BAUDRATE 9600
+/*CO2 sensor*/
+#define RX_PIN 16  //wire green here (8)
+#define TX_PIN 17  //wire blue here (9)
+/*CO2 sensor variables*/
+MHZ19 myMHZ19;
+HardwareSerial mySerial(2);
+unsigned long getDataTimer = 0;
+unsigned long timeElapse = 0;
+void verifyRange(int range);
+int CO2;
+int8_t Temp;
+int minCO2 = 1500;    // save min CO2 value
+int maxCO2 = 400;     // save max CO2 value
+int range;
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+  mySerial.begin(BAUDRATE);    // sensor serial
+  /*CO2 sensor*/
+  myMHZ19.begin(mySerial);     // pass to library
+  myMHZ19.autoCalibration();
+  timeElapse = 6e5;            // wait 10mins to calibrate
+  Serial.println("Calibrating... (10mins)");
+  delay(timeElapse);
+}
+void loop() {
+  // put your main code here, to run repeatedly:
+      if (millis() - getDataTimer >= 1000)  // Check if interval has elapsed (non-blocking delay() equivalent)
+    {
+        CO2 = myMHZ19.getCO2(); // get CO2 value
+        Serial.print("CO2 (ppm): ");
+        Serial.println(CO2);
+        if(CO2 < minCO2){   // if current CO2 value is lower than the min value: save the new value as the min
+          minCO2 = CO2;
+        }
+        if(CO2 > maxCO2){   // if current CO2 value is higher than the max value: save the new value as the max
+          maxCO2 = CO2;
+        }
+        Serial.print("Min CO2: ");
+        Serial.println(minCO2);
+        Serial.print("Max CO2: ");
+        Serial.println(maxCO2);
+        int8_t Temp;    // Buffer for temperature
+        Temp = myMHZ19.getTemperature();    // Request Temperature (as Celsius)
+        Serial.print("Temperature (C): ");
+        Serial.println(Temp);
+        range = maxCO2 - minCO2;  // calculate the range
+        Serial.print("Range: ");
+        Serial.println(range);
+        Serial.print("Lower threshold: ");
+        Serial.println(minCO2 + (range * 1 / 3));   // lower threshold
+        Serial.print("Higher threshold: ");
+        Serial.println(minCO2 + (range * 2 / 3));   // higher threshold
+        getDataTimer = millis();  // Update interval
+    }
+}
+</syntaxhighlight>'''platformio.ini:'''<syntaxhighlight lang="ini">
+[env:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+lib_deps = wifwaf/MH-Z19@^1.5.4
 </syntaxhighlight>
@@ Line 170: / Line 268: @@
 To build the final prototype for the Winterwerkschau, I decided to change the casing material to transparent acrylic sheets. I think it matches the concept that everything is transparent/translucent. Before building the real physical final prototype, I tried out several online tools to help me, such as 3D sketch plan, 2D blueprint and optimization software to cut the acrylic sheets, to know how much materials I needed. Because the dimension of my final prototype will depend on the bubble sticks (attached to the rotating stepper motor), and also the length of the breadboard, I decided to use half-size breadboard instead of a full-size one, since the full-size will be redundant for my project. The wiring diagram helped me to consider this, since I wouldn't need that much space of the breadboard. The half-size breadboard minimized the length (or depth) dimension of my prototype a lot. In building the final prototype, I learned a lot how to be creative in finding solutions with common materials or tools that I could find in the lab (either diyElectronics Lab in B15 or Electronics Lab in M5), at home or in the city. I'm glad that I made it work in the end:)
-//TODO: add gif/video<gallery mode="packed" heights="150">
+//TODO: add pics + gif/video<gallery mode="packed" heights="200">
 File:3D sketch bubble machine.png|3D plan - Tinkercad
 File:2D blueprint bubble machine.png|2D blueprint - cuttle.xyz
@@ Line 180: / Line 278: @@
 ===== Prototyping hurdles =====
-Technically it was challenging, since it was the first time I learned ESP32, plus I broke my first one in this class... But lessons learned, always make a wiring diagram and triple check everything! I usually only deal with digital problems, so prototyping with electronics and physical mechanical things adds dimension in the project, which means when I encounter a problem, that problem could be in any dimension and I couldn't really pinpoint where. Throughout the class, I experienced that problems can arise everywhere: cables, ESP32, understanding of mechanical/physical things, materials, tools, device specification that needs specific usage in the code, etc. But that's just the art of prototyping, as my friend said. We're not doing a finished line of production, so enjoy the ups and downs, the successes and failures. Fail fast is better.
+Technically it was challenging, since it was the first time I learned ESP32, plus I broke my first one in this class... But lessons learned, always make a wiring diagram and triple check everything! I usually only deal with digital problems, so prototyping with electronics and physical mechanical things adds dimension in the project, which means when I encounter a problem, that problem could be in any dimension and I couldn't really pinpoint where. Throughout the class, I experienced that problems can arise everywhere: cables, ESP32, understanding of mechanical/physical things, materials, tools, device specification that needs specific usage in the code, etc. But that's just the art of prototyping, as my friend said. We're not doing a finished line of production, so enjoy the ups and downs, the successes and failures. Fail fast is also better.
+I feel like I spent most of my time designing and planning for my prototypes rather than building the prototypes, both for the cardboard prototype (first prototype) and also the final one. I wasn't sure how it was supposed to be made, but I kept thinking about the measurements and the mechanisms so that I could make them work, at least logically in my mind. Sometimes even night and day, that I got a little bit overwhelmed. In the end though, I compromised the accuracy aspect and focused more on the functionality/mechanical things to make it work. "Just try it out" was definitely a motto for this project.
 ===== Learning from my Pothos plants (and observations) =====