Network scan IP Camera (Dahua)

MarcelTimmermans

Hi,

I am building an app for Dahua camera's. It seems to work all but I would like to implement the list_devices function so that only Dahua Camera's will be shown. This means I need to scan the network somehow and identify what is a Dahua camera. Anyone thoughts how to do this?

Marcel

robertklep

If you happen to be using `node-dahua-api`, I guess you could try and connect to an IP-address and see if it doesn't emit an `error` event.

From what I can infer from the code (not at all tested, just to get you going):

const ipcamera = require('node-dahua-api');

const checkForDahua = async (ip) => {
  const client = new ipcamera.dahua({
    host : ip,
    ... /* other options */
  });
  return new Promise((resolve, reject) => {
    dahua.once('error',   reject);
    dahua.once('connect', () => resolve(client));
  });
};

class DahuaDriver extends Homey.Driver {
  ...
  async onPairListDevices(data, callback) {
    let cameras = [];
    for (let i = 2; i < 255; i++) {
      try {
        let client = await checkForDahua('192.168.1.' + i);
        cameras.push(client);
      } catch(e) {
      }
    }
    return callback(null, cameras);
  }
}

MarcelTimmermans

Hi Robert,

Thanks. This is almost the same what I tried but this is taking relative long. So I first want to scan all the ip address an look for a manufacturer that is dahua and then do this on the limited set of ip addresses. But I am not sure how to find the manufacture (as for example you will see in Advanced IP Scanner). 

Unfortunately I cannot use the api as I am on windows and they use net-keepalive which is not supported under windows.

RuudvB

MarcelTimmermans said:

Hi,

I am building an app for Dahua camera's. 

Marcel

Cool! I have one which I would like to connect to homey. The model I own is a SD22204T-GN which get perfectly recognized by the app TinyCam Pro.
If you need testing, just let me know.

MarcelTimmermans

RuudvB said:

MarcelTimmermans said:

Hi,

I am building an app for Dahua camera's. 

Marcel

Cool! I have one which I would like to connect to homey. The model I own is a SD22204T-GN which get perfectly recognized by the app TinyCam Pro.
If you need testing, just let me know.

I have the same I just start with basic things... When someone on the doorbel rings the camera point to the front door

RichardR

That is great news, i also have a few outside

MarcelTimmermans

Mmh, I am a step further. I need to find the mac addresses in the local network. This could be done with arp -a but I am not sure this works on a homey? Anyone suggestions?

robertklep

@MarcelTimmermans you can resolve IP-addresses to MAC using `Homey.ManagerArp.getMac()`, which I guess you can run against the network subnet Homey is in.

MarcelTimmermans

robertklep said:

@MarcelTimmermans you can resolve IP-addresses to MAC using `Homey.ManagerArp.getMac()`, which I guess you can run against the network subnet Homey is in.

YES, That will work! Thanks!

MarcelTimmermans

Solved the issue, case closed