一、Introduction

Product introduction

EC20

This module does not support voice calls and SMS, if you need support, please contact business <sales@t-firefly.com>。

Detailed parameters

Model	EC20 R2.1 Mini PCIe
Working frequency band	TDD-LTE: B38/B39/B40/B41 FDD-LTE: B1/B3/B8 WCDMA: B1/B8 TD-SCDMA: B34/B39 GSM: 900/1800 MHz
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)
Structure size	51.0mm x 30.0mm x 4.9mm Weight about 10.5 g
Authentication	NAL/SRRC/CCC
Antenna Connectors	x3 main antenna, diversity antenna and GNSS antenna

二、Usage

三、Firmware and Resource download

Related documents and firmware download, see the official website Resource Download

四、Tutorial

Flash firmware

CPU	USB upgrade	SD upgrade
PX30	AIO-PX30-JD4
RK3128	Firefly-RK3128, AIO-3128C
RK3288	Firefly-RK3288, AIO-3288J, AIO-3288C	Firefly-RK3288, AIO-3288J, AIO-3288C
RK3308	ROC-RK3308B-CC-PLUS
RK3328	ROC-RK3328-CC, ROC-RK3328-PC	ROC-RK3328-CC
RK3399	Firefly-RK3399, ROC-RK3399-PC ROC-RK3399-PC-PLUS, AIO-3399JD4, AIO-3399J AIO-3399C	Firefly-RK3399, ROC-RK3399-PC ROC-RK3399-PC-PLUS, AIO-3399JD4, AIO-3399J AIO-3399C
RK3399Pro	AIO-3399Pro-JD4, AIO-3399ProC	AIO-3399Pro-JD4, AIO-3399ProC
RK3566	AIO-3566JD4, ROC-RK3566-PC	AIO-3566JD4, ROC-RK3566-PC
RK3568	AIO-3568J, ROC-RK3568-PC, ROC-RK3568-PC SE	AIO-3568J, ROC-RK3568-PC, ROC-RK3568-PC SE
RV1126_RV1109	AIO-1126-JD4, AIO-1109-JD4, [CAM-C1126S2U](../../AI Camera/CAM-C1126S2U/upgrade_firmware.md), [CAM-C1109S2U](../../AI Camera/CAM-C1109S2U/upgrade_firmware.md)	AIO-1126-JD4, AIO-1109-JD4
RK3588	ITX-3588J, ROC-RK3588S-PC, AIO-3588SJD4,AIO-3588Q	ITX-3588J, ROC-RK3588S-PC,AIO-3588SJD4 ,AIO-3588Q
RK3576	ROC-RK3576-PC, AIO-3576Q, AIO-3576C	ROC-RK3576-PC ,AIO-3576Q, AIO-3576C

EC20 GNSS Function(optional)

EC20 module supports wireless network data communication, including GNSS and without GNSS:

Suffix SNNS: not support GNSS
Suffix SGNS: support GNSS

GNSS is supported by public firmware, but disabled by default

EC20 module supports GPS, GLONASS, GALILEO and BEIDOU, and is compatible with standard NMEA 0183 protocol. It can output NMEA information of 1Hz frequency through USB NMEA interface. The default output serial port is /dev/ttyUSB1 and baud rate is 115200 bit/s.

Antenna Requirements

	Parameter
Frequency range	1559MHz~1609MHz
Polarization	RHCP or Linear
VSWR	< 2(Typical)
Active antenna noise figure	< 1.5dB
Active antenna gain	> 0dB
LNA gain embedded in active antenna	< 17dB

How to enable GPS and modify serial port Configuration

Android Temporary modification method

Enable ADB, and how to enable ADB, please refer to wiki tutorial ADB Use

Set system readable and writable

adb shell setprop persist.sys.root_access 3
adb root && adb remount

Modify Parameters
- Enabled GPS：Modify the parameter ro.factory.hasGPS in /vendor/build.prop on the machine to true to enable GPS. It will take effect after soft restarting the machine.
- Modify serial port configuration: change SERIAL_DEVICE and SERIAL_BAUD_RATE in /system/etc/u-blox.conf to /dev/ttyusb1 and 115200 respectively. It takes effect after soft restarting the machine.

Android Code modification method

Enabled GPS
- Modify the BOARD_HAS_GPS in the SDK directory device/rockchip/{CPU}/{PRODUCT}/{PRODUCT}.mk to true to enable GPS function. Then, recompile the SDK and upgrad the firmware to take effect.
Modify serial port configuration (serial port node or baud rate)
- Set SERIAL_DEVICE in device/rockchip/{CPU}/{PRODUCT}/GPS/u-blox.conf to /dev/ttyUSB1. SERIAL_BAUD_RATE is changed to 115200. Then, recompile the SDK and upgrad the firmware to take effect.

一、Introduction

Product introduction

EC20

Detailed parameters

二、Usage

Hardware connection

Module connection

PCIE connection

USB connection

SIM insertion