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Summary of Contents for Ebyte E28-2G4T20SX
- Page 1 E28-2G4T20SX/E28-2G4T27SX UserManual SX1281 2.4GHz High-Speed LoRa Module...
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Page 2: Table Of Contents
10. Production Guidance ·······································································································································································16 10.1 Reflow soldering temperature ..............................16 10.2 Reflow soldering curve ................................17 11.Related products ················································································································································································18 12. Antenna Guidance ···········································································································································································18 13. Package for batch order ··································································································································································19 Revision history ······················································································································································································20 About us ····································································································································································································20 Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 3: Product Overview
Smart Home and Industrial Sensors; Security system, location System Wireless remote control; UAV； Wireless Game Remote Controller Health care products； Wireless voice, wireless headset; Automotive industry applications. Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 4: Technical Parameters
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 Size 16*26mm Antenna IPEX-1/Sample hole 50Ω Impedance Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. - Page 5 121 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 Size 40.5*25mm Antenna IPEX-1/Sample hole 50Ω Impedance Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd.
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Page 6: Mechanical Characteristics
M2, M1 and M0 determine eight working modes TTL serial input, connected to external RXD output pin; Output It can be configured as drain open circuit or pull-up input. See parameter setting for details Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 7: E28-2G4T27Sx Mechanical Characteristics
Ground Ground Copyright ©2012–2025, 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. Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 9: Functional Description
Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4TxxSX User Manual 5. Functional Description 5.1. Fixed Transmission 5.2. Broadcast Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 10: Broadcast Address
Under continuous transmission mode, AUX=1 means the module is busy, but it is not applicable for waking up external MCU, because the data transmission is very quick under continuous transmission mode. AUX=1 means all serial data is transmitted through RF, and the module is at idle state. Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 11: Operation Modes
AUX status and enables quick mode switch; for example, when switching from transmitting mode to receiving mode, the user MCU could enter sleep mode before mode Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 12: 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. Reserved Mode (Mode 2) 6.4. (Reserved) 6.5. (Mode 3) Configuration mode Under this mode, Baud rate is fixed as 9600 8N1 Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 13: Command Format
Under configuration,(M0=1,M1=1), send command (HEX format) to the serial: C1 C1 C1, the C1+C1+C1 module will return current parameter values, i.e.: C0 00 00 13 18 04 7.3. Reading Version Number Command Format Description Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 14: Reset Command
The 10k（default） high the baud rate, the faster the data transmission shorter communication range. 100k 1M（FLRC） The lower the air data rate, the longer 2M（GFSK） the transmitting distance, the better anti- Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. - Page 15 100mA or above current output 20dBm（defult）） 27dBm（defult）） and ensure the power ripple is lower than 100mV. 17dBm 23dBm Low power transmission is not 14dBm 20dBm recommended due to its low power 10dBm 17dBm supply efficiency. Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd.
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Page 16: Hardware Design
The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly weakened. Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 17: Faq
Average ramp-up rate 3℃/second max 3℃/second max Liquidous Temperature (TL) Liquid phase temp. 183℃ 217℃ Time（tL）Maintained Above（TL） Time above liquid phase line 60-90 sec 30-90 sec Peak temperature 220-235℃ 230-250℃ Peak temperature（Tp） Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 18: Reflow Soldering Curve
Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4TxxSX User Manual Average ramp-down rate 6℃/second max 6℃/second max Average ramp-down rate（Tp to Tsmax） 10.2 Reflow soldering curve Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 19: Related Products
Straight antenna,ultra short TX2400-JZ-5 Rubber 2.4G SMA-J 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-XPL-150 Sucker 2.4G SMA-J Small sucker antenna,high gain Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 20: Package For Batch Order
Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4TxxSX User Manual 13. Package for batch order Copyright ©2012–2025, Chengdu Ebyte Electronic Technology Co., Ltd. -
Page 21: Revision History
Technical support: support@cdebyte.com Documents and RF Setting download link:https:// www.cdebyte.com Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com ------------------------------------------------------------------------------------------------------------ Address: B2 Mould Industrial Park, 199# Xiqu Ave, High tech Zone, Chengdu, Sichuan, China...
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