Merge pull request #95 from balena-io-hardware/ryan/wifi-channel

allow for configurable wifi access point channel

lib/features/network/implementations/linux-device/README.md

@@ -11,4 +11,5 @@
 ## Configuration
 
 - `WIRED_IF`: the name of the wired ethernet interface on the autokit, that is connected to the DUT - with the intent of sharing the autokit ethernet over this interface
-- `WIFI_IF`: the name of the wifi interface on the autokit that will be used to create a wifi access point
+- `WIFI_IF`: the name of the wifi interface on the autokit that will be used to create a wifi access point
+- `WIFI_AP_CHANNEL`: Some host devices don't like setting up an access point on channel > 11 - in this case, this variable can be used to speificy an integer value between 1 and 11, that the host will then use to set up the access point. If there are no issues, don't set this so networkManager automatically selects the best channel

lib/features/network/implementations/linux-device/networkManager.ts

@@ -80,6 +80,8 @@ class NetworkManager {
 			'802-11-wireless': {
 				mode: new dbus.Variant('s', 'ap'),
 				ssid: new dbus.Variant('ay', NetworkManager.stringToArrayOfBytes(ssid)),
+				band: new dbus.Variant('s', 'bg'),
+				...(process.env.WIFI_AP_CHANNEL && {channel: new dbus.Variant('u', Number(process.env.WIFI_AP_CHANNEL))}) 
 			},
 			'802-11-wireless-security': {
 				'key-mgmt': new dbus.Variant('s', 'wpa-psk'),