Christian Chavez
Published

IoT Morse Code Soil Sensor

A Particle Argon MCU reads data from a capacitive soil moisture and communicates that data to an iOS app using Morse code.

AdvancedProtip10 hours156
IoT Morse Code Soil Sensor

Things used in this project

Hardware components

Argon
Particle Argon
×1
Gravity: Analog Soil Moisture Sensor For Arduino
DFRobot Gravity: Analog Soil Moisture Sensor For Arduino
×1
NeoPixel Ring: WS2812 5050 RGB LED
Adafruit NeoPixel Ring: WS2812 5050 RGB LED
×1
Li-Ion Battery 1000mAh
Li-Ion Battery 1000mAh
×1

Story

Read more

Code

Morse Communication

C/C++
/*
 * Project LightCommunication
 * Description: Uses a NeoPixel to send soil moisture data via morse code  * to Morse Cam app for iOS
 * Author: Christian Chavez
 * Date: March 2021
 */

SYSTEM_MODE(SEMI_AUTOMATIC);

#include <neopixel.h>

#define PIXEL_PIN D2
#define PIXEL_COUNT 12
#define PIXEL_TYPE WS2812B

Adafruit_NeoPixel pixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

unsigned int currentTime;
unsigned int delayTime;
unsigned int cameraTime;
unsigned int morseTime;

int soilRead;
int soilPin=A2;
uint8_t i;
uint8_t n;
uint8_t soil[4];

bool calState=true;
bool cameraState=false;
bool morseState=false;

void setup() {
  pinMode(soilPin, INPUT);
  pixel.begin();
  pixel.show();
  pixel.clear();
  pixel.setBrightness(20);
  currentTime=millis();
}

void loop() {
  if(millis()-currentTime>10000){ //send morse code sequence every 10 seconds
    soilRead=analogRead(soilPin);
    soil[0]=soilRead/1000; //calculations for accessing individual characters from soil reading
    soil[1]=((soilRead-(soil[0]*1000))/100);
    soil[2]=(soilRead-(soil[0]*1000)-(soil[1]*100))/10;
    soil[3]=(soilRead-(soil[0]*1000)-(soil[1]*100))%10;
    sendMorse();
  }
}
  
void sendMorse(){  //.-. / -.-.- <your message> .-.-. //format for sending messages
  if(calState==true){
    dot(); dash(); dot(); //calibrate camera brightness
    calState=false;
    cameraState=true;
    cameraTime=millis();
    Serial.printf("Calibrate\n");
  }
  if(millis()-cameraTime>300&&cameraState==true){
   dash(); dot(); dash(); dot(); dash();//gain camera attention
   cameraState=false;
   morseState=true;
   morseTime=millis();
   Serial.printf("Camera\n");
  }
  if(millis()-morseTime>300&&morseState==true){
    for(i=0;i<4;i++){ //loop for sending morse code to neopixel
      Serial.printf("soil[i] = %i i = %i\n",soil[i],i);
      switch (soil[i]){
        case 0:
          dash(); dash(); dash(); dash(); dash(); space(); break;
        case 1:
          dot(); dash(); dash(); dash(); dash(); space(); break;
        case 2:
          dot(); dot(); dash(); dash(); dash(); space(); break;
        case 3:
          dot(); dot(); dot(); dash(); dash(); space(); break;
        case 4:
          dot(); dot(); dot(); dot(); dash(); space(); break;
        case 5:
          dot(); dot(); dot(); dot(); dot(); space(); break;
        case 6:
          dash(); dot(); dot(); dot(); dot(); space(); break;
        case 7:
          dash(); dash(); dot(); dot(); dot(); space(); break;
        case 8:
          dash(); dash(); dash(); dot(); dot(); space(); break;
        case 9:
          dash(); dash(); dash(); dash(); dot(); space(); break;
      }
      if(i==3){
        dot(); dash(); dot(); dash(); dot(); //end of message
        Serial.printf("Over\n");
        currentTime=millis();
        calState=true;
        cameraState=false;
        morseState=false;
      }
    }
  }
}

void dash(){
  unsigned int dashOnTime=millis();
  while(millis()-dashOnTime<300){
    for(n=0;n<=12;n++){
      pixel.setPixelColor(n,255,255,255);
      pixel.show();
    }
  }
  unsigned int dashOffTime=millis();
  while(millis()-dashOffTime<100){
    pixel.clear();
    pixel.show();
  }
}

void dot(){
  unsigned int dotOnTime=millis();
  while(millis()-dotOnTime<100){
    for(n=0;n<=12;n++){
      pixel.setPixelColor(n,255,255,255);
      pixel.show();
    }
  }
  unsigned int dotOffTime=millis();
  while(millis()-dotOffTime<100){
    pixel.clear();
    pixel.show();
  }
}

void space(){
  unsigned int spaceTime=millis();
  while(millis()-spaceTime<300){
    pixel.clear();
    pixel.show();
  }
}

Credits

Christian Chavez

Christian Chavez

4 projects • 13 followers
Internet of Things Coding and Hardware Design

Comments

Add projectSign up / Login