RDIoT Demo

Call server API for multiple sensor information [P002]

https://www.youtube.com/watch?v=6oUOoBihOfo

*GitHub : https://github.com/rdiot/rdiot-p002.git

* Parts

- Arduino Uno R3

- Ethernet W5100 Shield (W5100) [B004]

- LCD1602 (HD44780) [D002]

- Temperature and humidity DHT11 sensor module (KY-015) [S008]

- Button

* Contents

- Collect multiple (two temperature / humidity) sensor values on one sensor and load them into the server

Air Quality Sensor Measurement RGB Matrix Output [P004]

https://www.youtube.com/watch?v=BxdZ1Tk4Mmw

https://www.youtube.com/watch?v=yhVOXsE28B4

 https://www.youtube.com/watch?v=vl9jQZMoH-o

*GitHub : https://github.com/rdiot/rdiot-p004.git

* Parts

- Arduino Mega

- Air Quality Sensor (MQ135) [S037]

- 32x64 RGB LED Matrix P4 (LM-P4-SMD-RGB-LED) [D025]

- SI7021 Humidity Sensor (GY-21) [S068]

- Photo Resistor Module (KY-018) [S002]

* Contents

- Key Code

#include <Adafruit_GFX.h>   // Core graphics library

#include <RGBmatrixPanel.h> // Hardware-specific library

#include <MQ135.h>

#include <Wire.h>

int pin = A5; // Air Quality Sensor

// LED Matrix 

#define OE   9

#define LAT 10

#define CLK 11

#define A   A0

#define B   A1

#define C   A2

#define D   A3

RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false, 64);

MQ135 gasSensor = MQ135(pin);

#define RZERO 76.63

double rzero;

double result;

int i=0;

double rzero;

double result;

void setup() {
  matrix.begin(); // LED Matrix init
  matrix.drawPixel(0, 0, matrix.Color333(7, 7, 7));
  delay(500);

  matrix.fillRect(0, 0, 64, 32, matrix.Color333(0, 7, 0));
  delay(3000);
}

void loop() {

  matrix.fillScreen(matrix.Color333(0, 0, 0));
  matrix.setCursor(1, 1);    // start at top left, with 8 pixel of spacin

  if (i==0) {
   rzero = gasSensor.getRZero(); // float
  }

  if (i>0) { 
   result = gasSensor.getRZero();
   rzero = (rzero + result)/2;
  }

  float co2_ppm = gasSensor.getPPM();

  matrix.println("rz:"+(String)rzero+" ");
  matrix.setCursor(1, 9);    // start at top left, with 8 pixel of spacing
  matrix.println("rs:"+(String)result+" ");
  matrix.setCursor(1, 16);    // start at top left, with 8 pixel of spacing
  matrix.println("D:"+(String)analogRead(pin)+" ");
  matrix.setCursor(1, 23);    // start at top left, with 8 pixel of spacing
  matrix.println("A:"+(String)co2_ppm+"ppm");

  i++;

  if(co2_ppm > 10)

  {

    matrix.drawRect(0, 0, 64, 32, matrix.Color333(0, 4, 7));

  }

  else

  {

  // matrix.drawRect(0, 0, 64, 32, matrix.Color333(0, 4, 7));

  }

  //cool down
  delay(1000);

}

S198 - Sonoff ITEAD WiFi Switch Module (ESP8266)

https://www.youtube.com/watch?v=yGFyIM13VS0

https://www.youtube.com/watch?v=Bu8K9uPCroU

* Specs

Specification:
Voltage range: 90-250v AC(50/60Hz)
Max current: 10A
Max Wattage: 2200 watts
Dimensions: (L)88*(W)38*(H)23mm
Color: White
Humidity: 5%-95%
Wireless Frequency: 2.4Ghz
Working Temp: -20°C-75°C

Features:
Support WiFi network.
Support status tracking, home appliances status timely feedback to your App.
Support remotely turn on or off added devices.
Support Max 8 timing tasks for each added device.
Support numerous WiFi smart switches one smart phone.
Easy installation, easy handling and can be activated immediately and stably.

* Contents

- Connect

Input    Output
N ————N
L————-L

- Reference

 : https://www.itead.cc/blog/user-guide-for-sonoff-slampher

- download E-Welink app : https://play.google.com/store/apps/details?id=com.coolkit&hl=zh-CN