How to setup Android Things Raspberry Pi 3 to connect to wifi?

Question

I have installed a fresh copy of the latest Android Things rom into my pi 3 and now I wish to connect it to my tethered smartphones wifi connection.

How do I do that?

All examples I have seen has shown that it only works if you attach an ethernet connection from the pi 3 to a router?

Can't this done without ethernet cable and able to somehow type in commands on the actual pi 3 device to connect to a wifi?

I have my pi 3 attached to a external monitor with keyboard and mouse

Answer 1

This can be done via ADB if you have access to to a shell:

adb shell su 0 service call wifi 11

This will invoke WifiManager.startScan()

or you could try the following:

Once you can access a shell prompt, follow these steps:

1. Send an intent to the Wi-Fi service that includes the SSID of your local network. Your board must support the network protocol and frequency band of the wireless network in order to establish a connection.

     $ am startservice \
         -n com.google.wifisetup/.WifiSetupService \
         -a WifiSetupService.Connect

I looked up the documentation and you can get access to a shell can be done with a serial cable:

Alternatively, you could try writing an app to help you out (in the onCreate()) have not tested in Android things though:

Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    ComponentName cn = new ComponentName("com.android.settings", "com.android.settings.wifi.WifiSettings");
    intent.setComponent(cn);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);

EDIT

If you REALLY want to avoid the use of extra cables, you could mount the SD card to your normal pc (assuming linux I show how to mount here) and add the following to /data/misc/wifi/wpa_supplicant.conf:

network={
    ssid="[WIFI NAME]"
    key_mgmt=WPA-PSK
    psk="[PASSWORD]"
}

If you don't want your password stored in plain test you can generate the hash on the command line (and assuming you have the SD card mounted (I stole this from a script I wrote):

wpa_passphrase $1 $2 | awk '(NR != 3)' | sudo tee -a /data/misc/wifi/wpa_supplicant.conf > /dev/null

Where $1 is the name of the wifi and $2 is the password.