Brigadoon - An Occasional Corner on the Internet
USB WiFi Adapter
Designed by Mark Little
Older version of the Raspberry Pi do not comes with a WiFi connection. To provide a WiFi connection, the Raspberry Pi must either connect to a WiFi router via the Ethernet port or add a WiFi adapter via one of its USB ports.
There are many USB WiFi adapters that work and work well, but the problem is whether there is a device driver for that unit that works with the Raspberry Pi's operating system.
In many cases, a WiFi adapter will work immediately if plugged into the USB port. However, the default setting is likely to be as a client machine that obtains its IP address from a WiFi hotspot.
If you want to use the WiFi adapter such that the Raspberry Pi acts as a hotspot, it is best to confirm that someone has done it, with this actual model, before you buy the device. To run as a hotspot, will also require setting up networking parameters to assign it an IP address and to allocate addresses using a DHCP server.
In most cases, the Raspberry Pi projects on this website that use WiFi connections assume that the Raspberry Pi is connecting to a router which is acting like a WiFI hotspot, and assumes that the USB WiFi adapter is one of the units that works automatically as soon as it is plugged in. WiFi set up will be limited to setting up the SSID and password. The next page provides help setting up a WiFi connection that connects to an existing system.