claude garrett
Published © GPL3+

Air Quality Control

Are you aware of harmful gasses in your garage or shed? Monitor air quality, mitigate hazardous conditions, and improve the environment!

IntermediateFull instructions provided8 hours1,330
Air Quality Control

Things used in this project

Hardware components

Kinetis Freedom Board with FlexIO
NXP Kinetis Freedom Board with FlexIO
×1
Level Shifter Board
SparkFun Level Shifter Board
×1
SparkFun RedBoard
SparkFun RedBoard
×1
MQ-7 Gas Sensor SparkFun #SEN09403
×1
InClose FD1240 Mini 12V .11A Fan
×1
Resistor 1k ohm
Resistor 1k ohm
×2
1N4004 Diode
×1
Darlington High Power Transistor
Darlington High Power Transistor
×1
NS-232-02
×1
Star TSP600 Thermal Printer
Any generic RS-232 Thermal Printer should work
×1
NeoPixel OV7670 Camera Module
×1

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
DSO138 Oscilloscope

Story

Read more

Schematics

Air Quality Monitor Schematic

Monitors and logs Air Quality. Turns on exhaust fan when needed. Displays status on a webcam.

Code

Arduino RFID Card Reader

Arduino
Reads a card through SPI, sends the card UID through D1/TX serial port
/*
 * --------------------------------------------------------------------------------------------------------------------
 * Example sketch/program showing how to read data from a PICC to serial.
 * --------------------------------------------------------------------------------------------------------------------
 * This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
 * 
 * Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID
 * Reader on the Arduino SPI interface.
 * 
 * When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE
 * then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When
 * you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output
 * will show the ID/UID, type and any data blocks it can read. Note: you may see "Timeout in communication" messages
 * when removing the PICC from reading distance too early.
 * 
 * If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading).
 * So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all
 * details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so
 * keep the PICCs at reading distance until complete.
 * 
 * @license Released into the public domain.
 * 
 * Typical pin layout used:
 * -----------------------------------------------------------------------------------------
 *             MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
 *             Reader/PCD   Uno           Mega      Nano v3    Leonardo/Micro   Pro Micro
 * Signal      Pin          Pin           Pin       Pin        Pin              Pin
 * -----------------------------------------------------------------------------------------
 * RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST
 * SPI SS      SDA(SS)      10            53        D10        10               10
 * SPI MOSI    MOSI         11 / ICSP-4   51        D11        ICSP-4           16
 * SPI MISO    MISO         12 / ICSP-1   50        D12        ICSP-1           14
 * SPI SCK     SCK          13 / ICSP-3   52        D13        ICSP-3           15
 */

#include <SPI.h>
#include <MFRC522.h>

#define RST_PIN         9          // Configurable, see typical pin layout above
#define SS_PIN          10         // Configurable, see typical pin layout above

MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance

void setup() {
	Serial.begin(9600);		// Initialize serial communications with the PC
	while (!Serial);		// Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
	SPI.begin();			// Init SPI bus
	mfrc522.PCD_Init();		// Init MFRC522
	//mfrc522.PCD_DumpVersionToSerial();	// Show details of PCD - MFRC522 Card Reader details
	//Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
}

void loop() {
	// Look for new cards
	if ( ! mfrc522.PICC_IsNewCardPresent()) {
		return;
	}

	// Select one of the cards
	if ( ! mfrc522.PICC_ReadCardSerial()) {
		return;
	}

  

  // UID
  //Serial.print(F("Card UID:"));
  for (byte i = 0; i < mfrc522.uid.size; i++) {
    if(mfrc522.uid.uidByte[i] < 0x10)
      Serial.print(F("0"));
    else
      Serial.print(F(""));
    Serial.print(mfrc522.uid.uidByte[i], HEX);
  } 
  Serial.println();
  delay(10000); //Waits 10 seconds between scans
  
	// Dump debug info about the card; PICC_HaltA() is automatically called
	//mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
}

160707 FRDM-K82F Code.zip

C/C++
No preview (download only).

Credits

claude garrett

claude garrett

11 projects • 9 followers

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