Ebyte E28-2G4T12S User Manual
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Ebyte E28-2G4T12S User Manual

Sx1280 2.4ghz ttl lora module
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E28-2G4T12S User Manual
SX1280 2.4GHz TTL LoRa Module

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Summary of Contents for Ebyte E28-2G4T12S

  • Page 1 E28-2G4T12S User Manual SX1280 2.4GHz TTL LoRa Module...

  • Page 2: Table Of Contents

    10.2 Reflow soldering curve Related products··············································································································································· 16 12. Antenna Guidance··············································································································································16 ............................16 12.1 Antenna recommendation ..............................16 12.2 Antenna selection 13. Package for batch order······································································································································· 17 Revision history······················································································································································· 17 About us································································································································································ 17 Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 3: Product Overview

    1. Product Overview 1.1 Brief Introduction E28-2G4T12S is an UART module based on SEMTECH SX1280, it adopts transparent transmission and works at 2.4GHz band. It adopts LoRa, FLRC and GFSK modulations. It features SMD packing with both IPX and PCB antenna interfaces, and its TTL output is 3.3V.

  • Page 4: Technical Parameters

    2.5m，air data rate: 1kbps 121 Btye Max. Transmitting length per packet FIFO 221 Btye Continuous transmission mode GFSK Modulation LoRa FLRC Interface UART Package Connector 1.27mm Size 17.5*28.7mm Antenna IPEX/PCB 50Ω Impedance Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 5: Dimension And Pin Defintion

    Parameter Configuration. (can be floated) Module power source positive reference. Voltage range: 2.3 ~ 5.5V DC 10～11 Ground Ground Disconnected 12～19 Ground Ground Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 6: Recommended Connection Diagram

    The wireless UART module adopts TTL level, please connect to MCU with TTL level. For some 5V MCU, 4~10K pull-up resistor may need to be added at the TXD and AUX pins of the module. Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 7: Functional Description

    SX1280 Wireless Module E28-2G4T12S User Manual 5. Functional Description 5.1. Fixed Transmission 5.2. Broadcast Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 8: Broadcast Address

    AUX=1 means all serial data is transmitted through RF, and the module is at idle state.  5.6.3 Module in configuration process Only occurs when resetting or when exiting sleep mode  Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 9: Operation Modes

    This operation is very flexible and efficient, it is designed based on convenient MCU operation, and it could ease the  operation load of the entire system and increase the operation efficiency and lower the energy consumption. Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 10: Transmission Mode (Mode 0)

    Under this mode, the module will output current RSSI value of 2.4GHz signal every 100ms so as to check the channel quality, the value is in HEX compliment format. 6.4. Ranging Mode (Mode 2) (Reserved) Sleep Mode (Mode 3) 6.5. Under this mode, Baud rate is fixed as 9600 8N1 Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 11: Command Format

    Reading Operating Parameters Command Format Description Under configuration,(M0=1,M1=1), send command (HEX format) to the serial: C1 C1 C1, the module will return C1+C1+C1 current parameter values, i.e.: C0 00 00 13 18 04. Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 12: Reading Version Number

    TTL UART baud rate（bps） 1200 SPED 4800 Under normal mode, the mode can be different； 9600（default） Under continuous transmission mode, the 19200 baud rate must be the same. 57600 115200 460800 921600 Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 13 100mV. 10dBm power transmission recommended due to its low power supply 7dBm efficiency. 4dBm For example: The meaning of No.3 "SPED" byte: The binary bit of the byte Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 14: Hardware Design

    The antenna must not be installed inside the metal case, which will cause the transmission distance to be  greatly weakened. Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 15: Faq

    Poor power supply may cause messy code. Make sure that the power supply is reliable.  The extension line and feeder quality are poor or too long, so the bit error rate is high.  Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 16: Production Guidance

    Time（tL）Maintained Above（TL） Time above liquid phase line 60-90 sec 30-90 sec Peak temperature（Tp） Peak temperature 220-235℃ 230-250℃ Average ramp-down rate（Tp to Tsmax） Average ramp-down rate 6℃/second max 6℃/second max 10.2 Reflow soldering curve Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 17: Related Products

    2.4G SMA-J Fixed bending antenna TX2400-JK-11 Rubber 2.4G SMA-J Flexible antenna, omnidirectional TX2400-JK-20 Rubber 2.4G SMA-J Flexible antenna, omnidirectional TX2400-XPL-150 Sucker 2.4G SMA-J Small sucker antenna,high gain 12.2 Antenna selection PCB（Default） IPEX Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 18: Package For Batch Order

    2019-3-12 Content added 2020-05-11 Parameter correction About us Website: www.ebyte.com Sales: info@cdebyte.com Support: support@cdebyte.com Tel: +86-28-61399028 Ext. 812 Fax: +86-28-64146160 Address: Innovation Center B333~D347, 4# XI-XIN road,High-tech district (west), Chengdu, Sichuan, China Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co., Ltd.

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