Ebyte E28-2G4T27SX User Manual
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Ebyte E28-2G4T27SX User Manual

Sx1280 2.4ghz lora module
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E28-2G4T27SX
SX1280 2.4GHz LoRa Module

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Summary of Contents for Ebyte E28-2G4T27SX

  • Page 1 E28-2G4T27SX SX1280 2.4GHz LoRa Module...

  • Page 2: Table Of Contents

    9.3 BER(Bit Error Rate) is high..................................15 10.Production Guidance......................................16 10.1 Reflow soldering temperature..................................16 10.2. Reflow soldering curve....................................16 11. Related products........................................17 12. Antenna Guidance........................................ 18 13. Package for batch order......................................19 Revision history..........................................19 Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 3 Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4T27SX User Manual About us............................................19 Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 4: Product Overview

    1.Product Overview 1.1 Brief Introduction E28-2G4T27SX is an UART module based on SEMTECH SX1281, 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, compatible with 3.3V and 5V IO port voltage.

  • Page 5: Technical Parameters

    Distance 5000m height: 2.5m，air data rate: 1kbps 121 Btye Max. Transmitting length per packet FIFO 221 Btye Continuous transmission mode Cache 2048 Byte GFSK Modulation LoRa FLRC Interface UART Package Connector 1.27mm Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 6: Mechanical Characteristics

    Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4T27SX User Manual Size 40.5*25mm IPEX/Sample Antenna 50Ω Impedance hole 3. Mechanical Characteristics 3.1. Dimension Plan Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 7: Pin Definition

    M2, M1 and M0 determine eight working modes Input M2, M1 and M0 determine eight working modes Ground Ground Antenna interface (50 Ω characteristic impedance) Ground Ground Ground Ground cannot be floated, can be grounded if not used Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 8: 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. 5. Functional Description 5.1. Fixed Transmission Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 9: Broadcast

    UART, or whether the module is still in the process of self-check initialization. 5.6.1 Indication of serial output Used to wake up the external MCU (note: AUX indicates no delay under continuous mode)  Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 10: Indication Of Wireless Transmission

    GPIO of the MCU. When M2, M1 and M0 changed and the module is in idle state (AUX at high level), it can starts to work normally under new  Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 11: 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. Ranging Mode (Mode 2) 6.4. (Reserved)  6.5. (Mode 3) Configuration mode  Under this mode, Baud rate is fixed as 9600 8N1 Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 12: Command Format

    C3 C3 C3, the module will return current parameter values, i.e.: C3 00 28 10 0C 09 01 00; C3+C3+C3 The 00 28 means the module model number (E28 series), 10 means the version number, 0C means the transmitting power, other values means other characteristics. Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 13: Reset Command

    100k The lower the air data rate, the longer the 1M（FLRC） transmitting distance, better anti-interference performance longer transmitting time. 2M（FSK） The air data rates on both sides must be the same. Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 14 The external power source must provide 100mA or above current output and ensure 27dBm（defult）） the power ripple is lower than 100mV. 23dBm Low power transmission is not 20dBm recommended due to its low power supply 17dBm efficiency. Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 15: Hardware Design

     The antenna must not be installed inside the metal case, which will cause the transmission distance to be  greatly weakened.  Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 16: 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 ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 17: Production Guidance

    Time above liquid phase line 60-90 sec 30-90 sec Time（tL）Maintained Above（TL） Peak temperature（Tp） Peak temperature 220-235℃ 230-250℃ Average ramp-down rate 6℃/second max 6℃/second max Average ramp-down rate（Tp to Tsmax） 10.2 Reflow soldering curve Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 18: Related Products

    Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4T27SX User Manual 11.Related products Frequency Power Distance Size Type Package Interface E28-2G4T27SX SX1280 2.4G 12.5 17.5*28.7 E28-2G4M27S SX1280 2.4G 15*26.5 E28-2G4M20S SX1280 2.4G 15*26.5 E28-2G4M12S SX1280 2.4G 12.5 25*14 Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 19: Antenna Guidance

    Straight antenna,ultra short TX2400-JW-5 Rubber 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 Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 20: Package For Batch Order

    Initial Version About us Technical support: support@cdebyte.com Documents and RF Setting download link: www.ebyte.com Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com ------------------------------------------------------------------------------------------------------------ Fax: 028-64146160 Web: www.ebyte.com Address: B5 Mould Industrial Park, 199# Xiqu Ave, High tech Zone, Chengdu, Sichuan, China...

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