A WiFi direct group consists of 1 group owner and devices or peers connected to it as clients (P2P clients). The peer device acting as current access point is said to be assuming a group owner role in WiFi direct group. WPS and WPA2 are used for encryption and keep the communication private. Here each member is assigned a limited access point and other members connect to it as regular clients. WiFi direct is a WiFi certified standard enabling devices to connect with each other without requiring a wireless access point (a.k.a router or WiFi hot spot). Using this, devices can communicate with each other at typical WiFi speeds, unlike ad hoc wireless connections (which allows two or more devices to connect and communicate, and has a limit of 11 Mbps) or Bluetooth, setup required for WiFi direct is much simpler. Communication again will be socket communication. Same as earlier post the problem addressed is sharing IP and port information. I will start with a bit of theory about WiFi direct and then we will see how it is implementable using android APIs (Sample app source code git link is at the end of this post). In this post I will explain communication between two non-connected android devices (can be connected to same or other network, doesn’t really matter) via WiFi direct.
So if a WiFiConfig is already present for a given ssid, it will not recreate it.if the passphrase is changed it might fail to connect, in your scenarios if it likely for the passphrase to change, then it is better to create the config on every time.In my earlier blog post I discussed data sharing between two android devices in same network using NSD. Then it will try to get the WiFiConfig the given ssid, if the WiFiConfig is not already present, it will create a new WiFiConfig for the ssid. We have a simple activity with a button ,The real actions happens when we click the buttonįirst the program checks if the device is already connected to requested AP, if yes it will simply shows a toast message The programs assumes that it already got the access point details to which it needs to connect. In this blog we will see how we can do this using kotlin as our programming language, we have already seen how to setup environment for kotlin development here. Google showcased this feature using Google lens , where you point you camera at a wifi router and your device connects to the router Application might have got the details of the Access point from other means like Bluetooth or image processing of the router image. We might have some scenarios, where application needs to connect the device to a WiFi access point.
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