Use this code to Control your Hisense TV with In-built Fire TV remotely. This is the server code, needed for the front end code https://gist.github.com/saamerm/df3e08e9564c5a65b1cbf41b6c5be6ea

hisense-online-remote.js

// You need a server in order to prevent CORS errors from allowing you to communicate with the TV
// Steps to get started: Make sure you have node installed, then download this file (or create a new file and put it in a blank directory and then run the commands below in your terminal
// npm init -y
// npm install express cors adbkit wakeonlan
// node hisense-online-remote.js
const express = require('express');
const cors = require('cors');
const adb = require('adbkit');
const wol = require('wakeonlan');

const app = express();
app.use(cors());
app.use(express.json());

// ⚠️ Configurations for your Hisense Fire TV
const TV_IP = "{YOUR TVS IP ADDRESS, EG: 192.168.0.12}";
const TV_MAC = "{YOUR TVS MAC ADDRESS, EG: 14:14:16:92:28:9F}";  // For the Wake Up functionality

// Initialize the ADB Client
const adbClient = adb.createClient();
const deviceId = `${TV_IP}:5555`;

// Connect to the Fire TV over the network
function connectADB() {
    adbClient.connect(TV_IP, 5555)
        .then(() => console.log(`Connected to Fire TV ADB at ${deviceId}`))
        .catch(err => console.error(`ADB Connection failed (Is ADB turned on in TV settings?):`, err.message));
}
connectADB();

// Endpoint to turn the TV ON via Wake-on-LAN
app.post('/api/wakeup', (req, res) => {
    console.log(`Sending Wake-on-LAN packet to MAC: ${TV_MAC}`);
    wol(TV_MAC).then(() => {
        // Wait 5 seconds for network to initialize, then reconnect ADB
        setTimeout(connectADB, 5500);
        res.json({ success: true, message: "Magic packet sent successfully." });
    }).catch((err) => {
        console.error("Wake-on-LAN failed:", err);
        res.status(500).json({ success: false, error: err.message });
    });
});

// Primary Endpoint Route for Fire TV KeyEvents
app.post('/api/command', (req, res) => {
    const { key } = req.body; 
    if (!key) return res.status(400).json({ success: false, error: "Missing key parameter" });

    console.log(`Relaying Android KeyEvent to TV: [${key}]`);

    // Sends standard Android keyevents directly to Fire OS
    adbClient.shell(deviceId, `input keyevent ${key}`)
        .then(adb.util.readAll)
        .then(() => {
            res.json({ success: true });
        })
        .catch((err) => {
            console.error("Failed to send command. Attempting reconnection...", err.message);
            connectADB(); // Try to repair connection if dropped
            res.status(500).json({ success: false, error: "TV connection offline" });
        });
});

app.listen(3000, () => console.log('Fire TV Relay server active on http://localhost:3000'));