Using a fingerprint scanner for a safe lock, I got everything working using the adafruit library and standard code. Now I want to be able to turn the fingerprint sensor led backlight off when not in use so its actually hidden from view, then the backlight will turn on when finger pressure triggers a switch mounted behind the scanner. I looked up the library and there is an option to call the led on and off but im still a noob so how do you go about calling this function in the loop code?
/***************************************************
This is an example sketch for our optical Fingerprint sensor
Designed specifically to work with the Adafruit BMP085 Breakout
----> http://www.adafruit.com/products/751
These displays use TTL Serial to communicate, 2 pins are required to
interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#include <Adafruit_Fingerprint.h>
#if (defined(__AVR__) || defined(ESP8266)) && !defined(__AVR_ATmega2560__)
// For UNO and others without hardware serial, we must use software serial...
// pin #2 is IN from sensor (GREEN wire)
// pin #3 is OUT from arduino (WHITE wire)
// Set up the serial port to use softwareserial..
SoftwareSerial mySerial(2, 3);
#else
// On Leonardo/M0/etc, others with hardware serial, use hardware serial!
// #0 is green wire, #1 is white
#define mySerial Serial1
#endif
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
void setup()
{
pinMode(9,OUTPUT);
Serial.begin(9600);
//while (!Serial); // For Yun/Leo/Micro/Zero/...
delay(100);
Serial.println("\n\nAdafruit finger detect test");
// set the data rate for the sensor serial port
finger.begin(57600);
delay(5);
//if (finger.verifyPassword()) {
// Serial.println("Found fingerprint sensor!");
//} else {
// Serial.println("Did not find fingerprint sensor :(");
// while (1) { delay(1); }
//}
Serial.println(F("Reading sensor parameters"));
finger.getParameters();
Serial.print(F("Status: 0x")); Serial.println(finger.status_reg, HEX);
Serial.print(F("Sys ID: 0x")); Serial.println(finger.system_id, HEX);
Serial.print(F("Capacity: ")); Serial.println(finger.capacity);
Serial.print(F("Security level: ")); Serial.println(finger.security_level);
Serial.print(F("Device address: ")); Serial.println(finger.device_addr, HEX);
Serial.print(F("Packet len: ")); Serial.println(finger.packet_len);
Serial.print(F("Baud rate: ")); Serial.println(finger.baud_rate);
finger.getTemplateCount();
if (finger.templateCount == 0) {
Serial.print("Sensor doesn't contain any fingerprint data. Please run the 'enroll' example.");
}
else {
Serial.println("Waiting for valid finger...");
Serial.print("Sensor contains "); Serial.print(finger.templateCount); Serial.println(" templates");
}
}
void loop() // run over and over again
{
getFingerprintID();
delay(50); //don't ned to run this at full speed.
}
uint8_t getFingerprintID() {
uint8_t p = finger.getImage();
switch (p) {
case FINGERPRINT_OK:
Serial.println("Image taken");
break;
case FINGERPRINT_NOFINGER:
Serial.println("No finger detected");
return p;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
return p;
case FINGERPRINT_IMAGEFAIL:
Serial.println("Imaging error");
return p;
default:
Serial.println("Unknown error");
return p;
}
// OK success!
p = finger.image2Tz();
switch (p) {
case FINGERPRINT_OK:
Serial.println("Image converted");
break;
case FINGERPRINT_IMAGEMESS:
Serial.println("Image too messy");
return p;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
return p;
case FINGERPRINT_FEATUREFAIL:
Serial.println("Could not find fingerprint features");
return p;
case FINGERPRINT_INVALIDIMAGE:
Serial.println("Could not find fingerprint features");
return p;
default:
Serial.println("Unknown error");
return p;
}
// OK converted!
p = finger.fingerSearch();
if (p == FINGERPRINT_OK) {
Serial.println("Found a print match!");
} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println("Communication error");
return p;
} else if (p == FINGERPRINT_NOTFOUND) {
Serial.println("Did not find a match");
return p;
} else {
Serial.println("Unknown error");
return p;
}
// found a match!
Serial.print("Found ID #"); Serial.print(finger.fingerID);
Serial.print(" with confidence of "); Serial.println(finger.confidence);
//cycle door lock release on for 1 sec
digitalWrite(9,HIGH);
delay(1000);
digitalWrite(9,LOW);
delay(1000);
return finger.fingerID;
}
// returns -1 if failed, otherwise returns ID #
int getFingerprintIDez() {
uint8_t p = finger.getImage();
if (p != FINGERPRINT_OK) return -1;
p = finger.image2Tz();
if (p != FINGERPRINT_OK) return -1;
p = finger.fingerFastSearch();
if (p != FINGERPRINT_OK) return -1;
// found a match!
Serial.print("Found ID #"); Serial.print(finger.fingerID);
Serial.print(" with confidence of "); Serial.println(finger.confidence);
return finger.fingerID;
}
library
#ifndef ADAFRUIT_FINGERPRINT_H
#define ADAFRUIT_FINGERPRINT_H
/*!
* @file Adafruit_Fingerprint.h
*/
#include "Arduino.h"
#if defined(__AVR__) || defined(ESP8266)
#include <SoftwareSerial.h>
#elif defined(FREEDOM_E300_HIFIVE1)
#include <SoftwareSerial32.h>
#define SoftwareSerial SoftwareSerial32
#endif
#define FINGERPRINT_OK 0x00 //!< Command execution is complete
#define FINGERPRINT_PACKETRECIEVEERR 0x01 //!< Error when receiving data package
#define FINGERPRINT_NOFINGER 0x02 //!< No finger on the sensor
#define FINGERPRINT_IMAGEFAIL 0x03 //!< Failed to enroll the finger
#define FINGERPRINT_IMAGEMESS \
0x06 //!< Failed to generate character file due to overly disorderly
//!< fingerprint image
#define FINGERPRINT_FEATUREFAIL \
0x07 //!< Failed to generate character file due to the lack of character point
//!< or small fingerprint image
#define FINGERPRINT_NOMATCH 0x08 //!< Finger doesn't match
#define FINGERPRINT_NOTFOUND 0x09 //!< Failed to find matching finger
#define FINGERPRINT_ENROLLMISMATCH \
0x0A //!< Failed to combine the character files
#define FINGERPRINT_BADLOCATION \
0x0B //!< Addressed PageID is beyond the finger library
#define FINGERPRINT_DBRANGEFAIL \
0x0C //!< Error when reading template from library or invalid template
#define FINGERPRINT_UPLOADFEATUREFAIL 0x0D //!< Error when uploading template
#define FINGERPRINT_PACKETRESPONSEFAIL \
0x0E //!< Module failed to receive the following data packages
#define FINGERPRINT_UPLOADFAIL 0x0F //!< Error when uploading image
#define FINGERPRINT_DELETEFAIL 0x10 //!< Failed to delete the template
#define FINGERPRINT_DBCLEARFAIL 0x11 //!< Failed to clear finger library
#define FINGERPRINT_PASSFAIL \
0x13 //!< Find whether the fingerprint passed or failed
#define FINGERPRINT_INVALIDIMAGE \
0x15 //!< Failed to generate image because of lac of valid primary image
#define FINGERPRINT_FLASHERR 0x18 //!< Error when writing flash
#define FINGERPRINT_INVALIDREG 0x1A //!< Invalid register number
#define FINGERPRINT_ADDRCODE 0x20 //!< Address code
#define FINGERPRINT_PASSVERIFY 0x21 //!< Verify the fingerprint passed
#define FINGERPRINT_STARTCODE \
0xEF01 //!< Fixed falue of EF01H; High byte transferred first
#define FINGERPRINT_COMMANDPACKET 0x1 //!< Command packet
#define FINGERPRINT_DATAPACKET \
0x2 //!< Data packet, must follow command packet or acknowledge packet
#define FINGERPRINT_ACKPACKET 0x7 //!< Acknowledge packet
#define FINGERPRINT_ENDDATAPACKET 0x8 //!< End of data packet
#define FINGERPRINT_TIMEOUT 0xFF //!< Timeout was reached
#define FINGERPRINT_BADPACKET 0xFE //!< Bad packet was sent
#define FINGERPRINT_GETIMAGE 0x01 //!< Collect finger image
#define FINGERPRINT_IMAGE2TZ 0x02 //!< Generate character file from image
#define FINGERPRINT_SEARCH 0x04 //!< Search for fingerprint in slot
#define FINGERPRINT_REGMODEL \
0x05 //!< Combine character files and generate template
#define FINGERPRINT_STORE 0x06 //!< Store template
#define FINGERPRINT_LOAD 0x07 //!< Read/load template
#define FINGERPRINT_UPLOAD 0x08 //!< Upload template
#define FINGERPRINT_DELETE 0x0C //!< Delete templates
#define FINGERPRINT_EMPTY 0x0D //!< Empty library
#define FINGERPRINT_READSYSPARAM 0x0F //!< Read system parameters
#define FINGERPRINT_SETPASSWORD 0x12 //!< Sets passwords
#define FINGERPRINT_VERIFYPASSWORD 0x13 //!< Verifies the password
#define FINGERPRINT_HISPEEDSEARCH \
0x1B //!< Asks the sensor to search for a matching fingerprint template to the
//!< last model generated
#define FINGERPRINT_TEMPLATECOUNT 0x1D //!< Read finger template numbers
#define FINGERPRINT_AURALEDCONFIG 0x35 //!< Aura LED control
#define FINGERPRINT_LEDON 0x50 //!< Turn on the onboard LED
#define FINGERPRINT_LEDOFF 0x51 //!< Turn off the onboard LED
#define FINGERPRINT_LED_BREATHING 0x01 //!< Breathing light
#define FINGERPRINT_LED_FLASHING 0x02 //!< Flashing light
#define FINGERPRINT_LED_ON 0x03 //!< Always on
#define FINGERPRINT_LED_OFF 0x04 //!< Always off
#define FINGERPRINT_LED_GRADUAL_ON 0x05 //!< Gradually on
#define FINGERPRINT_LED_GRADUAL_OFF 0x06 //!< Gradually off
#define FINGERPRINT_LED_RED 0x01 //!< Red LED
#define FINGERPRINT_LED_BLUE 0x02 //!< Blue LED
#define FINGERPRINT_LED_PURPLE 0x03 //!< Purple LEDpassword
#define FINGERPRINT_REG_ADDR_ERROR 0x1A //!< shows register address error
#define FINGERPRINT_WRITE_REG 0x0E //!< Write system register instruction
#define FINGERPRINT_BAUD_REG_ADDR 0x4 //!< BAUDRATE register address
#define FINGERPRINT_BAUDRATE_9600 0x1 //!< UART baud 9600
#define FINGERPRINT_BAUDRATE_19200 0x2 //!< UART baud 19200
#define FINGERPRINT_BAUDRATE_28800 0x3 //!< UART baud 28800
#define FINGERPRINT_BAUDRATE_38400 0x4 //!< UART baud 38400
#define FINGERPRINT_BAUDRATE_48000 0x5 //!< UART baud 48000
#define FINGERPRINT_BAUDRATE_57600 0x6 //!< UART baud 57600
#define FINGERPRINT_BAUDRATE_67200 0x7 //!< UART baud 67200
#define FINGERPRINT_BAUDRATE_76800 0x8 //!< UART baud 76800
#define FINGERPRINT_BAUDRATE_86400 0x9 //!< UART baud 86400
#define FINGERPRINT_BAUDRATE_96000 0xA //!< UART baud 96000
#define FINGERPRINT_BAUDRATE_105600 0xB //!< UART baud 105600
#define FINGERPRINT_BAUDRATE_115200 0xC //!< UART baud 115200
#define FINGERPRINT_SECURITY_REG_ADDR 0x5 //!< Security level register address
// The safety level is 1 The highest rate of false recognition , The rejection
// rate is the lowest . The safety level is 5 The lowest tate of false
// recognition, The rejection rate is the highest .
#define FINGERPRINT_SECURITY_LEVEL_1 0X1 //!< Security level 1
#define FINGERPRINT_SECURITY_LEVEL_2 0X2 //!< Security level 2
#define FINGERPRINT_SECURITY_LEVEL_3 0X3 //!< Security level 3
#define FINGERPRINT_SECURITY_LEVEL_4 0X4 //!< Security level 4
#define FINGERPRINT_SECURITY_LEVEL_5 0X5 //!< Security level 5
#define FINGERPRINT_PACKET_REG_ADDR 0x6 //!< Packet size register address
#define FINGERPRINT_PACKET_SIZE_32 0X0 //!< Packet size is 32 Byte
#define FINGERPRINT_PACKET_SIZE_64 0X1 //!< Packet size is 64 Byte
#define FINGERPRINT_PACKET_SIZE_128 0X2 //!< Packet size is 128 Byte
#define FINGERPRINT_PACKET_SIZE_256 0X3 //!< Packet size is 256 Byte
//#define FINGERPRINT_DEBUG
#define DEFAULTTIMEOUT 1000 //!< UART reading timeout in milliseconds
///! Helper class to craft UART packets
struct Adafruit_Fingerprint_Packet {
/**************************************************************************/
/*!
@brief Create a new UART-borne packet
@param type Command, data, ack type packet
@param length Size of payload
@param data Pointer to bytes of size length we will memcopy into the
internal buffer
*/
/**************************************************************************/
Adafruit_Fingerprint_Packet(uint8_t type, uint16_t length, uint8_t *data) {
this->start_code = FINGERPRINT_STARTCODE;
this->type = type;
this->length = length;
address[0] = 0xFF;
address[1] = 0xFF;
address[2] = 0xFF;
address[3] = 0xFF;
if (length < 64)
memcpy(this->data, data, length);
else
memcpy(this->data, data, 64);
}
uint16_t start_code; ///< "Wakeup" code for packet detection
uint8_t address[4]; ///< 32-bit Fingerprint sensor address
uint8_t type; ///< Type of packet
uint16_t length; ///< Length of packet
uint8_t data[64]; ///< The raw buffer for packet payload
};
///! Helper class to communicate with and keep state for fingerprint sensors
class Adafruit_Fingerprint {
public:
#if defined(__AVR__) || defined(ESP8266) || defined(FREEDOM_E300_HIFIVE1)
Adafruit_Fingerprint(SoftwareSerial *ss, uint32_t password = 0x0);
#endif
Adafruit_Fingerprint(HardwareSerial *hs, uint32_t password = 0x0);
Adafruit_Fingerprint(Stream *serial, uint32_t password = 0x0);
void begin(uint32_t baud);
boolean verifyPassword(void);
uint8_t getParameters(void);
uint8_t getImage(void);
uint8_t image2Tz(uint8_t slot = 1);
uint8_t createModel(void);
uint8_t emptyDatabase(void);
uint8_t storeModel(uint16_t id);
uint8_t loadModel(uint16_t id);
uint8_t getModel(void);
uint8_t deleteModel(uint16_t id);
uint8_t fingerFastSearch(void);
uint8_t fingerSearch(uint8_t slot = 1);
uint8_t getTemplateCount(void);
uint8_t setPassword(uint32_t password);
uint8_t LEDcontrol(bool on);
uint8_t LEDcontrol(uint8_t control, uint8_t speed, uint8_t coloridx,
uint8_t count = 0);
uint8_t setBaudRate(uint8_t baudrate);
uint8_t setSecurityLevel(uint8_t level);
uint8_t setPacketSize(uint8_t size);
void writeStructuredPacket(const Adafruit_Fingerprint_Packet &p);
uint8_t getStructuredPacket(Adafruit_Fingerprint_Packet *p,
uint16_t timeout = DEFAULTTIMEOUT);
/// The matching location that is set by fingerFastSearch()
uint16_t fingerID;
/// The confidence of the fingerFastSearch() match, higher numbers are more
/// confidents
uint16_t confidence;
/// The number of stored templates in the sensor, set by getTemplateCount()
uint16_t templateCount;
uint16_t status_reg = 0x0; ///< The status register (set by getParameters)
uint16_t system_id = 0x0; ///< The system identifier (set by getParameters)
uint16_t capacity = 64; ///< The fingerprint capacity (set by getParameters)
uint16_t security_level = 0; ///< The security level (set by getParameters)
uint32_t device_addr =
0xFFFFFFFF; ///< The device address (set by getParameters)
uint16_t packet_len = 64; ///< The max packet length (set by getParameters)
uint16_t baud_rate = 57600; ///< The UART baud rate (set by getParameters)
private:
uint8_t checkPassword(void);
uint8_t writeRegister(uint8_t regAdd, uint8_t value);
uint32_t thePassword;
uint32_t theAddress;
uint8_t recvPacket[20];
Stream *mySerial;
#if defined(__AVR__) || defined(ESP8266) || defined(FREEDOM_E300_HIFIVE1)
SoftwareSerial *swSerial;
#endif
HardwareSerial *hwSerial;
};
#endif
The calls in the original code use lower case and periods but the library has everything labeled in uppercase with under scores, so what code has to be added to switch the led backlight on and off?