Wi-Fi

RITM SDR USRP does not have a built-in Wi-Fi module, but the DWA-N150C network adapter (150 Mbit/s, 2.4 GHz frequency range, Wi-Fi 4 802.11n standard, one integrated antenna) is supplied in the basic package. This adapter can be connected in two modes: router connection mode and access point mode.

It is recommended to use Wi-Fi only for transmitting control commands. Due to the limited bandwidth, the adapter may not provide stable transmission of large data streams.

Router connection mode

In this mode, the device connects to the existing router network, after which the SDR USRP RITM becomes available on the local network.

Before using Wi-Fi usage, you should configure the network in Embedded Linux. For more information, see External joints and periphery. Configuration is performed using the utility wifictl. The order of interaction with the utility:

Connect to the router:
```
wifictl set-sta HomeWiFi password123
```
View the STA connection parameters:
```
wifictl show-sta
```

To pair with the router, the function is used wifictl set-sta, and to check that the connection is correct — wifictl show-sta. After the connection is established, the receipt of the IP address from the router is checked by the command ip a.

Disadvantages of this mode: reduced data transfer rate due to the need for traffic routing and lack of mobility (when changing the network, you need to re-configure access parameters).

Access point mode

In this mode, the connection to the RITM SDR USRP is carried out directly.

Enable an access point:
```
wifictl ap
```
View AP settings:
```
wifictl show-ap
```
Set the access point SSID:
```
wifictl set-ap MyDevice 12345678
```

After RITM SDR USRP switches to access point mode, you need to find the corresponding SSID in the list of available networks.

This mode solves the problems described in the Router connection mode section, but it has its drawbacks: lack of access to the external network on the client device, as well as a limit on the number of simultaneously connected devices.