Wireless module

EC20 4G module suit

Product parameters

Model  EC20-C R2.0 Mini PCIe-C

Voltage  3.3V~ 3.6V, Typical value: 3.3V

Working frequency  TDD-LTE: B38/B39/B40/B41  FDD-LTE: B1/B3/B8  WCDMA:
B1/B8  TD-SCDMA: B34/B39  GSM: 900/1800

Data transmission  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)  TD-SCDMA：
Max 4.2Mbps (DL) Max 2.2Mbps (UL)  CDMA： Max 3.1Mbps (DL) Max 1.8Mbps
(UL)  EDGE： Max 236.8Kbps (DL) Max 236.8Kbps (UL)  GPRS： Max
85.6Kbps (DL) Max 85.6Kbps (UL)

Interface connector  USB：USB 2.0 high-speed interface, 480Mbps
Digital voice: Digital voice interface ×1 (optional)  USIM：1.8V/3V
Internet indicator: ×2, NET_STATUS and NET_MODE  UART：×1 UART  Reset:
low level  PWRKEY：low level  Antenna interface: ×3 (Main antenna,
diversity antenna and GNSS antenna interface)  ADC：×2

Size  51.0mm × 30.0mm × 4.9mm

Weight  About 10.5g

Certification  CCC/ NAL*/ TA

Image


Connection method

USB interface connection


Reference firmware

The public-version firmware supports EC20 4G module by default.

DELINCOMM Series

Product Parameter


The parameters of each module model of this series will be different,
please refer to

DelinComm_gps.pdf

Connection method

For DELICOMM series, VCC (red wire), GND (black wire), TX (white
wire), connect with Firefly-RK3288 UART3 3.3V, GND, RX.

DK2635U7F Module

Product Parameter


Connection method

For Module UBLOX, VCC(white wire), GND(black wire), TX(blue wire),
connect with Firefly-RK3288 UART3 3.3V, GND, RX.

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/rk3288/gps/u-blox.conf
    +++ b/device/rockchip/rk3288/gps/u-blox.conf
    @@ -35,7 +35,7 @@

     ### Serial interface
     # Device to be used by the driver
    -SERIAL_DEVICE          /dev/ttyS4
    +SERIAL_DEVICE          /dev/ttyS3
     #SERIAL_DEVICE         /dev/s3c2410_serial2
     #SERIAL_DEVICE         /dev/i2c-4
     #SERIAL_DEVICE         /dev/ttyACM0

Reference firmware

The public version firmware turns off GPS function by default, you can
modify the "ro.factory.hasGPS" in "/system/build.prop" to close or
open GPS .Then, please restart your board after completing the
modification.

Notice

The GPS function may occupy UART3. If you need to use UART3 for other
purposes, disable the GPS first.