events.js:173
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::51826
    at Server.setupListenHandle [as _listen2] (net.js:1256:14)
    at listenInCluster (net.js:1304:12)
    at Server.listen (net.js:1392:7)
    at EventedHTTPServer.listen (/home/pi/.nvm/versions/node/v11.11.0/lib/node_modules/homebridge/node_modules/hap-nodejs/lib/util/eventedhttp.js:60:19)
    at HAPServer.listen (/home/pi/.nvm/versions/node/v11.11.0/lib/node_modules/homebridge/node_modules/hap-nodejs/lib/HAPServer.js:158:20)
    at Bridge.Accessory.publish (/home/pi/.nvm/versions/node/v11.11.0/lib/node_modules/homebridge/node_modules/hap-nodejs/lib/Accessory.js:609:16)
    at Server._publish (/home/pi/.nvm/versions/node/v11.11.0/lib/node_modules/homebridge/lib/server.js:128:16)
    at Server.run (/home/pi/.nvm/versions/node/v11.11.0/lib/node_modules/homebridge/lib/server.js:97:10)
    at module.exports (/home/pi/.nvm/versions/node/v11.11.0/lib/node_modules/homebridge/lib/cli.js:45:10)
    at Object.<anonymous> (/home/pi/.nvm/versions/node/v11.11.0/lib/node_modules/homebridge/bin/homebridge:17:22)
Emitted 'error' event at:
    at emitErrorNT (net.js:1283:8)
    at processTicksAndRejections (internal/process/next_tick.js:76:17)
    at process.runNextTicks [as _tickCallback] (internal/process/next_tick.js:51:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:865:11)
    at internal/main/run_main_module.js:21:11