Wireless Module
Update time：2018-06-22 Views：4011
1 EC20 4G module
1.1 Product Parameter
Model
EC20-C R2.0 Mini PCIe-C
Power supply
3.3V～3.6V (Typical 3.3V)
Band
TDD-LTE: B38/B39/B40/B41
FDD-LTE：B1/B3/B8
WCDMA: B1/B8
TD-SCDMA: B34/B39
GSM: 900/1800
TDD-LTE： Max 130Mbps (DL) Max 35Mbps (UL)
FDD-LTE： Max 150Mbps (DL) Max 50Mbps (UL)
DC-HSPA+： Max 42Mbps (DL) Max 5.76Mbps (UL)
UMTS： Max 384Kbps (DL) Max 384Kbps (UL)
CDMA： Max 3.1Mbps (DL) Max 1.8Mbps (UL)
TD-SCDMA： Max 4.2Mbps (DL) Max 2.2Mbps (UL)
EDGE： Max 236.8Kbps (DL) Max 236.8Kbps (UL)
GPRS： Max 85.6Kbps (DL) Max 85.6Kbps (UL)
USB: USB 2.0 high-speed interface, 480Mbps
Digital voice: 1 digital voice interface (optional)
USIM: 1.8 V / 3 V
Network instructions: * 2, NET_STATUS, and NET_MODE
UART: x 1 UART
Reset: low level
PWRKEY: low level
Antenna interface: x 3 (main antenna, split antenna and GNSS antenna interface)
ADC: x 2
51.0×30.0×4.9mm
About 10.5 g
CCC/ NAL*/ TA
Data
Connector
Dimensions
Weight
Approvals
1.2 Firmware follow
The official website of the public version of the default firmware support EC20 4G dongle module, Baidu Pan link：public version of the default firmware
The EC20 USB 4G module patch link:patch
1.3 Picture
1.4 Connection method
USB interface connection
Mini-PCIe interface connection
GPS Module
Product Parameter
1.Firmware download
The firmware defaults to open the GPS :Download Link
2.Connection method
As for Module UBLOX, VCC(white cable), GND(black cable), TX(blue cable), connect with AIO-3399J UART2 3.3V GND RX.
3.Modification method
Modify uart device which you connect with GPS, or modify android system conf file directly /system/etc/u-blox.conf 。
--- a/device/rockchip/rk3399/gps/u-blox.conf +++ b/device/rockchip/rk3399/gps/u-blox.conf @@ -35,7 +35,7 @@ ### Serial interface # Device to be used by the driver -SERIAL_DEVICE /dev/ttyS4 +SERIAL_DEVICE /dev/ttysWK2 #SERIAL_DEVICE /dev/s3c2410_serial2 #SERIAL_DEVICE /dev/i2c-4 #SERIAL_DEVICE /dev/ttyACM0
GPS is available by default in firmware above, but the public version firmware defaults to close it. You can modify "ro.factory.hasGPS" in "/system/build.prop" to close or open GPS. Then, please restart your board after completing the modification.
4.Note
The GPS function will occupy uart2, so please follow above modification method to close the GPS before using uart2 to do other things.
