6. Android Application
6.1 Display
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Connect the board and monitor, then start up. EM3288 supports Dual-screen display (HDMI/LVDS).
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6.1.1 Dual-screen different display
Settings -> Display -> HDMI -> Turn On, check dual screen and Vice screen rotation
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Press and hold volume + and volume simultaneously and hold for 2 seconds.
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The same operation can exit the different display mode.
6.1.2 Miracast
Miracast is a wireless display standard designed for mirroring a smartphone, tablet, or PC’s screen to a television without requiring any physical HDMI cables.
Miracast using WiFi protocol, it must be connected to the same WiFi.
Settings -> Display -> Cast -> Check Enable wireless display
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6.2 SD Card
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EM3288 supports SD Hot-plug.
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6.3 USB Host
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The USB2.0 Host can be used to connect USB mouse, USB keyboard, U-Disk or other USB devices. Support Hot-plug.
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6.4 Video&Audio Player
Copy video file to SD_card/U-disk then insert it to the board. Click Video icon and select multimedia file to play.
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6.5 Ethernet
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Connect the board and router with an Ethernet cable (default DHCP=Yes). User can ping URL/IP at terminal, or open the browser to test Network.
su
ping www.boardcon.com
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6.6 Record
EM3288 supports recording via line-in(headset) or differential MIC. Default MIC recording. It will switch to the Line_in recording automatically if inserted the headset.
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Open the APP Sound Recorder in Android.
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Click Start button to start recording.
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After finish recording, click Stop and Save to store file.
The default storage path is Internal Memory/Android/data/com.android.soundrecorder/files/Download
Audio output priority: Headphone > HDMI
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6.7 RTC
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Execute the command hwclock at CRT terminal to query hardware clock
busybox hwclock
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6.8 WiFi
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Connect the WiFi antenna, then click Settings -> Network&internet -> Wi-Fi -> turn on, select the SSID from the list of available networks and enter the password.
After connected, user can ping URL/IP at terminal, or open the browser to test Network.
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6.9 Bluetooth
Click Settings -> Bluetooth -> turn on
Select the available device in the list to pair.
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6.10 4G
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Step 1, Insert 4G module to PCIe slot (4G model: EC20/EC25).
Step 2, Connect antenna and insert SIM card.
Step 3, Power on. The default network connection is 4G network.
4G network settings
Settings -> Wireless&networks -> More -> Cellular networks -> Preferred network type -> LTE
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6.11 GPS
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EM3288 4G module combines high-speed wireless connectivity with embedded multi-constellation high-sensitivity GPS+GLONASS receiver for positioning.
In addition, the development board also supports a standalone GPS module(Model: ST-91-U7).
Connect GPS antenna, then power on and install the APP /Tools/GPS_test1.2.4.apk
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6.12 Camera
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Connect the camera module (OV13850) to the development board before power on, then click the camera APP to test.
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6.11 UART
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The UART loopback test is for reference only.
Step 1, push the file com
to the test board via ADB
adb root
adb remount
adb push \xx\com /system //\xx\ is the absolute path to store com
adb shell
chmod 777 /system/com //Modify com properties
Step 2, connect the transmit (TX) pin to the receive (RX) pin of UART1
Step 3, after executes the command, input character to test UART
./system/com /dev/ttyS1 115200 8 0 1 //Test UART1
6.12 SATA
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Connect the SATA and SATA-power to the development board before power on,then the SATA will auto mount.
Since SATA requires a relatively high current, the SATA power supply on the EM3288 may not provide sufficient current, leading to instability. Therefore, it is advisable to provide SATA power externally.
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