Hi all,
I am creating a rfid wiegand reader with an ESP8285 board. I use the WiFiManager library to generate an AP, configure the Wifi and then create a Web Server. Everything works almost well.
The problem I have is when I connect the interruption pins of the reader, the ESP8285 board does not generate the AP or the WebServer, first I must disconnect the pins from the reader and then make the Wifi configuration and there I get up the web server without problems, Then I connect the reader's pins and everything works. But if I have the connector pins from the beginning it does not work for me, because of the terminal I see strange characters.
Do you have any idea what the problem might be?
Below I show you the code and the schematic.
#include <FS.h>
#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h> // https://github.com/tzapu/WiFiManager
// Set web server port number to 80
WiFiServer server(80);
#define MAX_BITS 100 // max number of bits
#define WEIGAND_WAIT_TIME 3000 // time to wait for another weigand pulse.
unsigned char databits[MAX_BITS]; // stores all of the data bits
unsigned char bitCount; // number of bits currently captured
unsigned char flagDone; // goes low when data is currently being captured
unsigned int weigand_counter; // countdown until we assume there are no more bits
unsigned long facilityCode=0; // decoded facility code
unsigned long cardCode=0; // decoded card code
String sFacilityCode = "";
String sCardCode = "";
const byte interruptPin0 = 13;
const byte interruptPin1 = 15;
String header;
// interrupt that happens when INTO goes low (0 bit)
void ISR_INT0()
{
Serial.print("0"); // uncomment this line to display raw binary
bitCount++;
flagDone = 0;
weigand_counter = WEIGAND_WAIT_TIME;
}
// interrupt that happens when INT1 goes low (1 bit)
void ISR_INT1()
{
Serial.print("1"); // uncomment this line to display raw binary
databits[bitCount] = 1;
bitCount++;
flagDone = 0;
weigand_counter = WEIGAND_WAIT_TIME;
}
void setup()
{
Serial.begin(9600);
Serial.println("RFID Readers");
pinMode(interruptPin0, INPUT_PULLUP); //data0
pinMode(interruptPin1, INPUT_PULLUP); //data1
// binds the ISR functions to the falling edge of INTO and INT1
attachInterrupt(digitalPinToInterrupt(interruptPin0), ISR_INT0, FALLING);
attachInterrupt(digitalPinToInterrupt(interruptPin1), ISR_INT1, FALLING);
weigand_counter = WEIGAND_WAIT_TIME;
// WiFiManager
// Local intialization. Once its business is done, there is no need to keep it around
WiFiManager wifiManager;
wifiManager.autoConnect("AutoConnectAP");
// or use this for auto generated name ESP + ChipID
//wifiManager.autoConnect();
// if you get here you have connected to the WiFi
Serial.println("Connected.");
server.begin();
}
void loop()
{
tagReader();
webServer();
}
void printBits()
{
// I really hope you can figure out what this function does
Serial.print("FC = ");
Serial.print(facilityCode);
Serial.print(", CC = ");
Serial.println(cardCode);
sCardCode = String(cardCode);
sFacilityCode = String(facilityCode);
}
void tagReader(){
// This waits to make sure that there have been no more data pulses before processing data
if (!flagDone) {
if (--weigand_counter == 0){
flagDone = 1;
}
}
// if we have bits and we the weigand counter went out
if (bitCount > 0 && flagDone) {
unsigned char i;
Serial.print("Read ");
Serial.print(bitCount);
Serial.print(" bits. ");
// we will decode the bits differently depending on how many bits we have
// see www.pagemac.com/azure/data_formats.php for mor info
if (bitCount == 35)
{
// 35 bit HID Corporate 1000 format
// facility code = bits 2 to 14
for (i=2; i<14; i++)
{
facilityCode <<=1;
facilityCode |= databits[i];
}
// card code = bits 15 to 34
for (i=14; i<34; i++)
{
cardCode <<=1;
cardCode |= databits[i];
}
printBits();
}
else if (bitCount == 26)
{
// standard 26 bit format
// facility code = bits 2 to 9
for (i=1; i<9; i++)
{
facilityCode <<=1;
facilityCode |= databits[i];
}
// card code = bits 10 to 23
for (i=9; i<25; i++)
{
cardCode <<=1;
cardCode |= databits[i];
}
printBits();
}
else {
// you can add other formats if you want!
Serial.println("Unable to decode.");
}
// cleanup and get ready for the next card
bitCount = 0;
facilityCode = 0;
cardCode = 0;
for (i=0; i<MAX_BITS; i++)
{
databits[i] = 0;
}
}
}
void webServer(){
WiFiClient client = server.available(); // Listen for incoming clients
if (client) { // If a new client connects,
Serial.println("New Client."); // print a message out in the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
header += c;
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println("Connection: close");
client.println();
// Display the HTML web page
client.println("<!DOCTYPE html><html>");
client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
client.println("<link rel=\"icon\" href=\"data:,\">");
// CSS to style the on/off buttons
// Feel free to change the background-color and font-size attributes to fit your preferences
client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
client.println(".button { background-color: #195B6A; border: none; color: white; padding: 16px 40px;");
client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
client.println(".button2 {background-color: #77878A;}</style></head>");
// Web Page Heading
client.println("<body><h1>ESP8285 Tag Reader</h1>");
client.println("<p>CardCode: " + sCardCode + "</p>");
client.println("<p>FacilityCode: " + sFacilityCode + "</p>");
client.println("</body></html>");
// The HTTP response ends with another blank line
client.println();
// Break out of the while loop
break;
} else { // if you got a newline, then clear currentLine
currentLine = "";
}
} else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
}
}
// Clear the header variable
header = "";
// Close the connection
client.stop();
Serial.println("Client disconnected.");
Serial.println("");
}
}
