#WIFI-2 - OEM WiFi USB module (RaLink RT5370N) (Out of stock)

<abstract>
WIFI-2 is an USB 2.0 module compliant with IEEE802.11 b/g/n. It is based on a 
RaLink RT5370N chip and fully supported by the latest Kernel Linux versions.
It can be mounted directly on a PCB instead of 
plugged in a USB port and works at 3.3 Volt. It can 
work in managed, ad-hoc and access point mode. 
</abstract>

<div class="alert alert-danger" role="alert" markdown="1">
This product is discontinued by the manufacturer. Please evaluate this
alternative @article='WIFI-5'
</div>

<img src="wifi_modules.jpg" width="320px"/>

This module is available in two versions:

* __WIFI-2__  which needs an external RF antenna plugged on the i-PEX MHF receptacle
* __WIFI-2-IA__  without the i-PEX MHF receptacle using the onboard PCB antenna

Both models are available with a 6 pin pitch 2mm solded on semi-holes to be plugged on
a female connector or welded directly on the PCB.

##Datasheets

* [Module datasheet](./GWF-3M08-Datasheet.pdf)
* [Chip RT5370N datasheet](./RT5370N_datasheet.pdf)
* [PCB antenna datasheet](./AN-WIFI-01.pdf)
* [Rubber antenna datasheet](./AN-WIFI-02.pdf)
* [Rubber antenna cable datasheet](./AN-WIFI-02-CABLE.pdf)

##Certifications

* [CE certification (April 2020)](./CE-3M08-apr2020.pdf)
* [CE certification (November 2016)](./CE-3M08-14nov2016.pdf)
* [CE certification (September 2012)](./CE-3M08-26sep2012.pdf)
* [CE test report](./GWF-3M08-TestReport.pdf)
* [FCC certification](./GWF-3M08-FCC.pdf)
* [RoHS certification](./GWF-3M08-ROHS.pdf)

## Articles

* @article='arietta_wifi'

## Pinout

* @include='pinout_WIFI-2'

## Linux Kernel configuration

This are the driver to enable inside the Linux Kernel to support wifi module. Follow these articles
to know how to compile the Linux kernel:

* @article='roadrunner_compile_kernel_4_19'

To change the Kernel configuration use this command on your Linux PC as described on this article:

	make ARCH=arm menuconfig
	
Thanks set these items:

	Device Drivers  --->
	  [*] USB support  ---> 
	    <*> USB Wireless Device Management support

and these:

	Device Drivers > 
	  Network device support > 
	    Wireless LAN [*]
	     [*]   Ralink devices
	     <*>   Ralink driver support --->
	     
and then:

	--- Ralink driver support
	< >   Ralink rt2500 (USB) support
	< >   Ralink rt2501/rt73 (USB) support
	<*>   Ralink rt27xx/rt28xx/rt30xx (USB) support
	[ ]     rt2800usb - Include support for rt33xx devices
	[ ]     rt2800usb - Include support for rt35xx devices (EXPERIMENTAL)
	[ ]     rt2800usb - Include support for rt3573 devices (EXPERIMENTAL)
	[*]     rt2800usb - Include support for rt53xx devices (EXPERIMENTAL)
	[ ]     rt2800usb - Include support for rt55xx devices (EXPERIMENTAL)
	[ ]     rt2800usb - Include support for unknown (USB) devices
	[ ]   Ralink debug output

## Package installation

A closed firmware made by RaLink need to be installed. This firmware will be loaded on the
module at startup

Change this line in __/etc/apt/sources.list__

	deb http://cdn.debian.net/debian/ buster main

in

	deb http://cdn.debian.net/debian/ buster main contrib non-free

then update the package index by typing

	sudo apt update
	sudo apt install firmware-ralink


Install iw and wpasupplicant using __make menuconfig__:

	sudo apt install wpasupplicant
	sudo apt install iw

###Network configuration to get access to a WPA-WPA2-protected Wi-Fi

Add, inside the directory __/etc/network/interfaces.d__ a file called __wlan0__ 
by typing:

	sudo nano /etc/network/interfaces.d/wlan0
	
Write these lines and save:	

	allow-hotplug wlan0
	iface wlan0 inet dhcp
		wireless-essid any
		pre-up wpa_supplicant -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -B
		post-down killall -q wpa_supplicant

Create a file called __/etc/wpa_supplicant.conf__ that contains your access point name 
and password.

	sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

Write these lines and save:	

	ctrl_interface=/var/run/wpa_supplicant
	ap_scan=1
	
	network={
		ssid="acmetest"
		psk="acmetest"
	}

Alternatively it is possible to hide the password using __wpa_phassphrase__ by typing:

	wpa_passphrase acmetest acmetest
	
result	
	
	network={
		ssid="acmetest"
		#psk="acmetest"
		psk=8e347eea89c0f5a5726f56f553ae6c72240bf83e1ca23dddb3a88f7cefac1bc5
	}

Restart wlan0 with these command or reboot:

	sudo ifdown wlan0
	sudo ifup wlan0

After a while if the dhcp are working well you will obtain your interface up. 


## Wi-fi adapters

* @article='WIFI-2'
* @article='WIFI-3'
* @article='WIFI-4'
* @article='WIFI-5'

@include='bio_tanzilli'