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Summary of Contents for Ebyte E28-2G4M27SX
- Page 1 E28-2G4M27SX User Manual SX1281 2.4GHz 500mW SPI High-speed LoRa module...
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Page 2: Table Of Contents
Chapter 7 Welding Operation Guidance..........................10 7.1 Reflow temperature ...............................10 7.2 Reflow soldering curve ............................11 Chapter 8 Related Models ..............................11 Chapter 9 Antenna Guidelines ..............................11 9.1 Antenna recommendation ............................11 Revise History ....................................12 About us ......................................13 Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 3: Disclaimer And Copyright Notice
Electronic Technology Co., Ltd. reserves the right to modify the contents of this manual without any notice or prompt. This manual is only used as a guide. Chengdu Ebyte Electronic Technology Co., Ltd. does its best to provide accurate information in this manual. However, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 4: Chapter 1 Product Overview
Smart bracelets and health management, etc. SX1281 supports RSSI, users can realize in-depth secondary development according to their needs. E28-2G4M27SX is a pure RF transceiver module, which needs to be driven by MCU or use a dedicated SPI debugging tool. 1.2 Features and Functions ... -
Page 5: Chapter 2 Technical Parameters
Main parameters Description Remark Clear and open, antenna gain 5dBi, antenna height 2.5 meters, Reference Distance 8000m air rate 1kbps FIFO 256Byte The maximum length of a single transmission Crystal Frequency 52MHz ±10ppm/11pF Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 6: Chapter 3 Mechanical Dimensions And Pin Definition
SPI clock input pin; can also be used as a UART request to transmit pin SCK_RTSN Input (see SX1281 manual for details) NSS_CTS Input Module chip select pin, used to start an SPI communication; also used for Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 7: Chapter 4 Basic Operations
It is recommended to stay away from the module according to the intensity of the interference. If the situation allows, appropriate isolation and shielding can be done; Assuming that there are traces with large electromagnetic interference around the module Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 8: Software Editing
It is recommended to set the power output parameter of SX1281 to 0dBm. At this time, the module can output power of 27dBm. When the output power of SX1281 is increased, the current will increase, and the power will not increase significantly. Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 9: Chapter 5 Basic Applications
Chengdu Ebyte Electronic Technology Co., Ltd. E28-2G4M27SX User manual Chapter 5 Basic Applications 5.1 Basic circuit Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 10: Chapter 6 Faq
If the power supply is not ideal, it may also cause garbled characters. Be sure to ensure the reliability of the power supply; Poor quality or too long extension lines and feeder lines will also cause a high bit error rate. Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 11: Chapter 7 Welding Operation Guidance
Peak temperature 220-235℃ 230-250℃ Aveage ramp-down rate（Tp to Tsmax） Average rate of descent 6℃/second max 6℃/second max Time from 25°C to peak Time 25℃ to peak temperature 6 minutes max 8 minutes max temperature Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 12: Reflow Soldering Curve
E28-2G4M20S SX1281 2.4G 15*26.5 E28-2G4M12S SX1281 2.4G 12.5 25*14 Chapter 9 Antenna Guidelines 9.1 Antenna recommendation Antennas play an important role in the communication process, and often inferior antennas will have a great Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 13: Revise History
TX2400-JK-20 Rubber 2.4G SMA-J omnidirectional antenna Small suction cup antenna, TX2400-XPL-150 Sucker 2.4G SMA-J cost-effective Revise History Version Revision Date Revision Notes Operator 2022-10-13 Bug fixes 2024-2-23 Bug fixes Modified ranging 2024-4-18 description Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 14: About Us
Chengdu Ebyte Electronic Technology Co., Ltd. E28-2G4M27SX User manual About us Hotline：4000-330-990 Tel：028-61399028 Support：support@cdebyte.com Website：https://www.fr-ebyte.com Address：Building B5, No. 199, West District Avenue, High-tech West District, Chengdu City, Sichuan Province Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co., Ltd.
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