#include <WiFiS3.h>
#include <SPI.h>
#include <MFRC522.h>
#include <ArduinoJson.h>
#include <TinyGPS.h>
#define RST_PIN 9
#define SS_PIN 10
MFRC522 mfrc522(SS_PIN, RST_PIN);
//WIFI CREDENTIALS//
char ssid[] = "Home 4G";
char pass[] = "P@ssw0rd123!";
int status = WL_IDLE_STATUS;
const char* host = "www.ssbms2024.online";
TinyGPS gps;
//SETUP//
void setup() {
Serial.begin(9600);
Serial1.begin(9600);
while (!Serial) {
;
}
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
status = WiFi.begin(ssid, pass);
delay(10000);
}
Serial.println("You're connected to the network");
Serial.println("IP Address: ");
Serial.println(WiFi.localIP());
SPI.begin();
mfrc522.PCD_Init();
Serial.println("RFID ready");
}
// READ DATA FROM SERVER //
void read_response(WiFiClient& client) {
uint32_t data_num = 0;
bool jsonDetected = false;
char data[500];
while (client.available() && data_num < 500) {
char c = client.read();
if ('{' == c) {
jsonDetected = true;
}
if (jsonDetected) {
data[data_num++] = c;
}
}
data[data_num] = '\0';
// RAW DATA JSON DATA //
if (jsonDetected) {
Serial.println("Raw JSON Response:");
Serial.println(data);
DynamicJsonDocument doc(512);
DeserializationError error = deserializeJson(doc, data);
if (error) {
Serial.print("deserializeJson() failed: ");
Serial.println(error.c_str());
} else {
Serial.println("Parsed JSON:");
const char* phoneNumber = doc["contact_number"];
const char* message = doc["message"];
const char* status = doc["status"];
const char* timestamp = doc["timestamp"];
const char* guardian = doc["guardian"];
const char* first_name = doc["child_firstname"];
const char* last_name = doc["child_lastname"];
const char* year_level = doc["year_level"];
const char* section = doc["section"];
Serial.print("Phone Number: ");
Serial.println(phoneNumber);
Serial.print("Message: ");
Serial.println(message);
Serial.print("Timestamp: ");
Serial.println(timestamp);
Serial.print("Guardian: ");
Serial.println(guardian);
Serial.print("Child's Name: ");
char childName[50];
sprintf(childName, "%s %s", first_name, last_name);
Serial.println(childName);
Serial.print("Yr & Sec: ");
char yrAndSec[50];
sprintf(yrAndSec, "%s %s", year_level, section);
Serial.println(yrAndSec);
Serial.print("Status: ");
Serial.println(status);
}
}
}
//READ RFID//
void loop() {
if (mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial()) {
String rfidData = "";
for (byte i = 0; i < mfrc522.uid.size; i++) {
rfidData += String(mfrc522.uid.uidByte[i], HEX);
}
Serial.println("RFID Tag: ");
Serial.println(rfidData);
//CONNECT TO THE SERVER SSBMS//
WiFiClient client;
if (client.connect(host, 80)) {
Serial.println("Connected to server");
client.print("GET /validate_rfid?rfid=" + rfidData + " HTTP/1.1\r\n");
client.print("Host: ");
client.print(host);
client.print("\r\n");
client.print("Connection: close\r\n\r\n");
while (client.connected() && !client.available()) delay(1);
read_response(client);
client.stop();
} else {
Serial.println("Connection to server failed");
}
delay(1000);
}
// GPS data reading
while (Serial1.available() > 0) {
char c = Serial1.read();
if (gps.encode(c)) {
float latitude, longitude;
gps.f_get_position(&latitude, &longitude);
Serial.print("Latitude: ");
Serial.print(latitude, 6);
Serial.print(", Longitude: ");
Serial.println(longitude, 6);
}
delay(5000);
}
}
I have a project that involves reading RFID cards to validate them against a server and reading GPS latitude and longitude data every 5 seconds. However, I'm facing two issues:
- When I upload the code, only the GPS functionality works, and the RFID scanning does not. I've checked the wiring and connections, and the RFID reader is powered and functional. What could be causing this issue?
- I'm also experiencing problems with software serial not working with the GPS module. I've double-checked the software serial pins and settings in my code, but it's still not working. Any suggestions on how to troubleshoot this?
PS: i am using RC522 RFID module, neo6mv2 GPS module, and the Arduino UNO R4 WIFI
