xNT Hand Implant to Webhook to Home Assistant Event Trigger

 https://www.instagram.com/p/DKZQHQBi4Eq/ 

#include <WiFi.h>

#include <HTTPClient.h>

#include <SPI.h>

#include <MFRC522.h>

// === Wi-Fi credentials ===

const char* ssid = "SSID";

const char* password = "password";

// === Home Assistant Webhook endpoint ===

const char* webhook_url = "http://HA_IP_ADDRESS:8123/api/webhook/rfid_trigger";

// === SPI Pin Assignments for Xiao ===

#define RST_PIN 3

#define SS_PIN 7

MFRC522 mfrc522(SS_PIN, RST_PIN);

// === Setup ===

void setup() {

Serial.begin(115200);

while (!Serial);

Serial.println("Connecting to Wi-Fi...");

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {

delay(500);

Serial.print(".");

}

Serial.println("\nWi-Fi connected.");

Serial.println("Initializing RFID...");

SPI.begin(8, 9, 10); // SCK, MISO, MOSI

mfrc522.PCD_Init();

Serial.println("Ready to scan tags.");

}

// === Send UID to Home Assistant via Webhook ===

void sendWebhook(String uid) {

if (WiFi.status() != WL_CONNECTED) return;

HTTPClient http;

http.begin(webhook_url);

http.addHeader("Content-Type", "application/json");

String payload = "{\"uid\": \"" + uid + "\"}";

int code = http.POST(payload);

Serial.print("Sent UID: "); Serial.print(uid);

Serial.print(" | HTTP Response: "); Serial.println(code);

http.end();

}

// === Main loop ===

void loop() {

if (!mfrc522.PICC_IsNewCardPresent() || !mfrc522.PICC_ReadCardSerial()) return;

String uid = "";

for (byte i = 0; i < mfrc522.uid.size; i++) {

if (mfrc522.uid.uidByte[i] < 0x10) uid += "0";

uid += String(mfrc522.uid.uidByte[i], HEX);

}

uid.toUpperCase();

Serial.println("Scanned UID: " + uid);

sendWebhook(uid);

delay(2000); // debounce

mfrc522.PICC_HaltA();

}