[rtl872x] Use security type from usb message for joining hidden networks

[scott-brust]

Problem

Joining a hidden wifi network via USB JoinNewNetworkRequest message fails even if the fields are populated correctly, ie hidden is true, and security is set to the correct value.

Solution

P2 platforms will use the provided SSID to scan for the network, and infer the security type from the actual network. I believe this was done to workaround CLI/app issues when P2 platform was being brought up.

If the network is not found, or it is hidden, then no security value will be used and any wifi connection attempts will fail.
The solution is to use the provided security type from the USB message if the network is hidden, or is not detected during a scan.

Steps to Test

1. Flash firmware with this branch
2. Use example node.js snippet to send the pbuf encoded message:

import * as usb from 'particle-usb';

const devices = await usb.getDevices();
console.log(devices);

for (let device of devices) {
  console.log("Device Type: ", device.type);
}

let p2_device = devices[0];
await p2_device.open();

let messages = [
	{
		ssid: "TP-Link_F6E0", // <-- Your hidden SSID Here
		bssid: null,
		security: 4, //   WPA_WPA2_PSK = 4
		hidden: true,
		credentials: {
			type: 1, // CredentialsType.PASSWORD
			password: "78019348". // <--- Your password here
		},
	}
]

for (let i in messages) {
	let msg = messages[i];
	console.log("Sending: ", msg);
	
	let rep = await p2_device._sendAndHandleProtobufRequest('wifi.JoinNewNetworkRequest', msg, { timeout: 30000 });
	
	console.log("Response ", rep);
}

await p2_device.close();

output:

Device Type:  p2
Sending:  {
  ssid: 'TP-Link_F6E0',
  bssid: null,
  security: 4,
  hidden: true,
  credentials: { type: 1, password: '78019348' }
}
Response  { pass: true, replyObject: JoinNewNetworkReply {} }

Example App

Any

References

Original hidden network support PR

---

Completeness

• User is totes amazing for contributing!
• Contributor has signed CLA (Info here)
• Problem and Solution clearly stated
• Run unit/integration/application tests on device
• Added documentation
• Added to CHANGELOG.md after merging (add links to docs and issues)