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Intel® Joule™

Intel® Joule™, Intel’s highest-performing system-on-module, packs powerful compute capabilities in a thumb-sized, low-power package. The Intel® Joule™ 550x/570x developer kit enables developers to rapidly prototype all manner of autonomous robots and IoT applications requiring computer vision or edge processing.

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Flashing the image

Before you begin flashing, you will need the following items in addition to your Joule board:

To flash Android Things onto your board, download the preview image in the Android Things Console (see the release notes) and follow these steps:

Step 1: Install Fastboot

If this is your first time installing Android Things on the Joule, you need to upgrade the BIOS and bootloader to be Fastboot capable. Follow the Intel Getting Started Guide to perform the required one-time setup steps on your board.

Step 2: Connect the Hardware

Connect the board to your host computer as shown below:

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  1. Connect a 12V adapter to the power input connector.
  2. Connect a USB-C cable from your host computer for USB OTG.
  3. Connect a Micro-HDMI cable to an external display.
  4. Optionally, connect a USB keyboard for BIOS setup.

Step 3: Flash Android Things

Once you have loaded the proper bootloader on your device, use the following steps to flash the Android image:

  1. Update the Android SDK Platform Tools to version 25.0.3 or later from the SDK Manager.

    • Verify that the fastboot binary is installed in the platform-tools/ directory of your Android SDK.
    • After you have the fastboot tool, add it to your PATH environment variable.
  2. Open a command line terminal and navigate to the unzipped image directory.

  3. Verify that the device has booted into Fastboot mode by executing the following:

    $ fastboot devices
    1b2f21d4e1fe0129	fastboot
    
  4. Execute the flash-all.sh script. This script installs the necessary bootloader, baseband firmware(s), and operating system. (On Windows systems, use flash-all.bat instead).

  5. To verify that Android is running on the device, discover it using the adb tool:

    $ adb wait-for-device
    ...
    $ adb devices
    List of devices attached
    1b2f21d4e1fe0129	device
    

Connecting Wi-Fi

After flashing your board, it is strongly recommended to connect it to the internet. This allows your device to deliver crash reports and receive updates.

Before connecting your board to a Wi-Fi network, ensure the provided antennas are attached to the u.FL Wi-Fi connectors on your board as shown:

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To connect your board to Wi-Fi, first access a shell prompt on the device. You can use either of the following methods:

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

  1. Send an intent to the Wi-Fi service that includes the SSID and passcode 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 \
        -e ssid <Network_SSID> \
        -e passphrase <Network_Passcode>
    

    For passcodes with special characters (space, !, ", $, &, ', (, ), ;, <, >, `, or |), you must use base64 encoding. Replace the passphrase argument in the command above with the following:

    -e passphrase64 <Base64 Network_Passcode>
    
  2. Verify that the connection was successful through logcat:

    $ logcat -d | grep Wifi
    ...
    V WifiWatcher: Network state changed to CONNECTED
    V WifiWatcher: SSID changed: ...
    I WifiConfigurator: Successfully connected to ...
    
  3. Test that you can access a remote IP address:

    $ ping 8.8.8.8
    PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
    64 bytes from 8.8.8.8: icmp_seq=1 ttl=57 time=6.67 ms
    64 bytes from 8.8.8.8: icmp_seq=2 ttl=57 time=55.5 ms
    64 bytes from 8.8.8.8: icmp_seq=3 ttl=57 time=23.0 ms
    64 bytes from 8.8.8.8: icmp_seq=4 ttl=57 time=245 ms
    
  4. Check that the date and time are set correctly on the device:

    $ date
    

If you want to clear all of the saved networks on the board:

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

Serial debug console

The serial console is a helpful tool for debugging your board and reviewing system log information. The console is the default output location for kernel log messages (i.e. dmesg), and it also provides access to a full shell prompt that you can use to access commands such as logcat. This is helpful if you are unable to access ADB on your board through other means and have not yet enabled a network connection.

To access the serial console, connect a micro USB cable to the board as shown below.

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Open a connection to the USB serial device on your development computer using a terminal program, such as PuTTY (Windows), Serial (Mac OS), or Minicom (Linux). The serial port parameters for the console are as follows:

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