esp8266 ต่อกับโมดูลสแกนนิ้ว fingerprint โค้ดไม่error แต่ข้อความไม่ออก

นี้โค้ดที่ใช้ค่ะ

//*******************************libraries********************************
#include <SPI.h>
#include <Wire.h>
#include <WiFiClient.h>
#include <ESP8266WiFi.h>
#include <SoftwareSerial.h>
#include <ESP8266WebServer.h>
#include <ESP8266HTTPClient.h>
#include <Adafruit_Fingerprint.h> //https://github.com/adafruit/Adafruit-Fingerprint-Sensor-Library
//************************************************************************
//Fingerprint scanner Pins
#define Finger_Rx D5
#define Finger_Tx D6

//************************************************************************
SoftwareSerial mySerial(2,3);
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
//************************************************************************
/* Set these to your desired credentials. */
const char *ssid = "hello"; //ENTER YOUR WIFI SETTINGS
const char *password = "12345678";
//************************************************************************
String postData ; // post array that will be send to the website
String link = "http://YourComputerIP/biometricattendance/getdata.php"; //computer IP or the server domain
int FingerID = 0; // The Fingerprint ID from the scanner
uint8_t id;

//************************************************************************
void setup() {

Serial.begin(115200);
//---------------------------------------------

connectToWiFi();

//---------------------------------------------

// set the data rate for the sensor serial port

finger.begin(57600);
Serial.println("\n\nAdafruit finger detect test");

if (finger.verifyPassword()) {
Serial.println("Found fingerprint sensor!");

} else {
Serial.println("Did not find fingerprint sensor :(");

while (1) { delay(1); }
}
//---------------------------------------------

finger.getTemplateCount();
Serial.print("Sensor contains "); Serial.print(finger.templateCount); Serial.println(" templates");
Serial.println("Waiting for valid finger...");

//------------*test the connection*------------

SendFingerprintID( FingerID );

}
//************************************************************************
void loop() {

//check if there's a connection to WiFi or not
if(WiFi.status() != WL_CONNECTED){
connectToWiFi();
}
//---------------------------------------------
//If there no fingerprint has been scanned return -1 or -2 if there an error or 0 if there nothing, The ID start form 1 to 127
FingerID = getFingerprintID(); // Get the Fingerprint ID from the Scanner
delay(50); //don't need to run this at full speed.

//---------------------------------------------

DisplayFingerprintID();

//---------------------------------------------

ChecktoAddID();

//---------------------------------------------

ChecktoDeleteID();

//---------------------------------------------
}
//************Display the fingerprint ID state on the OLED*************
void DisplayFingerprintID(){
//Fingerprint has been detected
if (FingerID > 0){

SendFingerprintID( FingerID ); // Send the Fingerprint ID to the website.

}
//---------------------------------------------
//No finger detected
else if (FingerID == 0){

Serial.print("No");
}
//---------------------------------------------
//Didn't find a match
else if (FingerID == -1){

Serial.print("don'tfind");
}
//---------------------------------------------
//Didn't find the scanner or there an error
else if (FingerID == -2){

Serial.print("error");
}
}
//************send the fingerprint ID to the website*************
void SendFingerprintID( int finger ){

HTTPClient http; //Declare object of class HTTPClient
//Post Data
postData = "FingerID=" + String(finger); // Add the Fingerprint ID to the Post array in order to send it
// Post methode

http.begin(link); //initiate HTTP request, put your Website URL or Your Computer IP
http.addHeader("Content-Type", "application/x-www-form-urlencoded"); //Specify content-type header

int httpCode = http.POST(postData); //Send the request
String payload = http.getString(); //Get the response payload

Serial.println(httpCode); //Print HTTP return code
Serial.println(payload); //Print request response payload
Serial.println(postData); //Post Data
Serial.println(finger); //Print fingerprint ID

if (payload.substring(0, 5) == "login") {
String user_name = payload.substring(5);
Serial.println(user_name);


}
else if (payload.substring(0, 6) == "logout") {
String user_name = payload.substring(6);
Serial.println(user_name);

}
delay(1000);

postData = "";
http.end(); //Close connection
}
//********************Get the Fingerprint ID******************
int 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 0;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
return -2;
case FINGERPRINT_IMAGEFAIL:
Serial.println("Imaging error");
return -2;
default:
Serial.println("Unknown error");
return -2;
}
// OK success!
p = finger.image2Tz();
switch (p) {
case FINGERPRINT_OK:
Serial.println("Image converted");
break;
case FINGERPRINT_IMAGEMESS:
Serial.println("Image too messy");
return -1;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
return -2;
case FINGERPRINT_FEATUREFAIL:
Serial.println("Could not find fingerprint features");
return -2;
case FINGERPRINT_INVALIDIMAGE:
Serial.println("Could not find fingerprint features");
return -2;
default:
Serial.println("Unknown error");
return -2;
}
// OK converted!
p = finger.fingerFastSearch();
if (p == FINGERPRINT_OK) {
Serial.println("Found a print match!");
} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println("Communication error");
return -2;
} else if (p == FINGERPRINT_NOTFOUND) {
Serial.println("Did not find a match");
return -1;
} else {
Serial.println("Unknown error");
return -2;
}
// found a match!
Serial.print("Found ID #"); Serial.print(finger.fingerID);
Serial.print(" with confidence of "); Serial.println(finger.confidence);

return finger.fingerID;
}
//******************Check if there a Fingerprint ID to delete******************
void ChecktoDeleteID(){

HTTPClient http; //Declare object of class HTTPClient
//Post Data
postData = "DeleteID=check"; // Add the Fingerprint ID to the Post array in order to send it
// Post methode

http.begin(link); //initiate HTTP request, put your Website URL or Your Computer IP
http.addHeader("Content-Type", "application/x-www-form-urlencoded"); //Specify content-type header

int httpCode = http.POST(postData); //Send the request
String payload = http.getString(); //Get the response payload

if (payload.substring(0, 6) == "del-id") {
String del_id = payload.substring(6);
Serial.println(del_id);
deleteFingerprint( del_id.toInt() );
}

http.end(); //Close connection
}
//******************Delete Finpgerprint ID*****************
uint8_t deleteFingerprint( int id) {
uint8_t p = -1;

p = finger.deleteModel(id);

if (p == FINGERPRINT_OK) {
Serial.println("Deleted!");

} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println("Communication error");

return p;
} else if (p == FINGERPRINT_BADLOCATION) {
Serial.println("Could not delete in that location");

return p;
} else if (p == FINGERPRINT_FLASHERR) {
Serial.println("Error writing to flash");

return p;
} else {
Serial.print("Unknown error: 0x"); Serial.println(p, HEX);

return p;
}
}
//******************Check if there a Fingerprint ID to add******************
void ChecktoAddID(){

HTTPClient http; //Declare object of class HTTPClient
//Post Data
postData = "Get_Fingerid=get_id"; // Add the Fingerprint ID to the Post array in order to send it
// Post methode

http.begin(link); //initiate HTTP request, put your Website URL or Your Computer IP
http.addHeader("Content-Type", "application/x-www-form-urlencoded"); //Specify content-type header

int httpCode = http.POST(postData); //Send the request
String payload = http.getString(); //Get the response payload

if (payload.substring(0, 6) == "add-id") {
String add_id = payload.substring(6);
Serial.println(add_id);
id = add_id.toInt();
getFingerprintEnroll();
}
http.end(); //Close connection
}
//******************Enroll a Finpgerprint ID*****************
uint8_t getFingerprintEnroll() {

int p = -1;

while (p != FINGERPRINT_OK) {
p = finger.getImage();
switch (p) {
case FINGERPRINT_OK:
Serial.println("Image taken");

break;
case FINGERPRINT_NOFINGER:
Serial.println(".");

break;
case FINGERPRINT_PACKETRECIEVEERR:

break;
case FINGERPRINT_IMAGEFAIL:
Serial.println("Imaging error");
break;
default:
Serial.println("Unknown error");
break;
}
}

// OK success!

p = finger.image2Tz(1);
switch (p) {
case FINGERPRINT_OK:
Serial.println("OK");

break;
case FINGERPRINT_IMAGEMESS:
Serial.println(".");

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;
}

Serial.println("Remove finger");
delay(2000);
p = 0;
while (p != FINGERPRINT_NOFINGER) {
p = finger.getImage();
}
Serial.print("ID "); Serial.println(id);
p = -1;

while (p != FINGERPRINT_OK) {
p = finger.getImage();
switch (p) {
case FINGERPRINT_OK:
Serial.println("Image taken");

break;
case FINGERPRINT_NOFINGER:
Serial.println(".");

break;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
break;
case FINGERPRINT_IMAGEFAIL:
Serial.println("Imaging error");
break;
default:
Serial.println("Unknown error");
break;
}
}

// OK success!

p = finger.image2Tz(2);
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!
Serial.print("Creating model for #"); Serial.println(id);

p = finger.createModel();
if (p == FINGERPRINT_OK) {
Serial.println("Prints matched!");

} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println("Communication error");
return p;
} else if (p == FINGERPRINT_ENROLLMISMATCH) {
Serial.println("Fingerprints did not match");
return p;
} else {
Serial.println("Unknown error");
return p;
}

Serial.print("ID "); Serial.println(id);
p = finger.storeModel(id);
if (p == FINGERPRINT_OK) {
Serial.println("Stored!");

confirmAdding();
} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println("Communication error");
return p;
} else if (p == FINGERPRINT_BADLOCATION) {
Serial.println("Could not store in that location");
return p;
} else if (p == FINGERPRINT_FLASHERR) {
Serial.println("Error writing to flash");
return p;
} else {
Serial.println("Unknown error");
return p;
}
}
//******************Check if there a Fingerprint ID to add******************
void confirmAdding(){

HTTPClient http; //Declare object of class HTTPClient
//Post Data
postData = "confirm_id=" + String(id); // Add the Fingerprint ID to the Post array in order to send it
// Post methode

http.begin(link); //initiate HTTP request, put your Website URL or Your Computer IP
http.addHeader("Content-Type", "application/x-www-form-urlencoded"); //Specify content-type header

int httpCode = http.POST(postData); //Send the request
String payload = http.getString(); //Get the response payload

delay(1000);
Serial.println(payload);

http.end(); //Close connection
}
//********************connect to the WiFi******************
void connectToWiFi(){
WiFi.mode(WIFI_OFF); //Prevents reconnection issue (taking too long to connect)
delay(1000);
WiFi.mode(WIFI_STA);
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("Connected");

Serial.print("IP address: ");
Serial.println(WiFi.localIP()); //IP address assigned to your ESP

}

เท่าที่ทดลอง fingerprint รองรับ esp32 ยังไม่รองรับ esp8266

สาเหตุเพราะติดปัญหาทางการสื่อสารแบบ Serial กับ esp8266

อาจจะต้องหาข้อมูลเพิ่มเติมครับ