background image

Chengdu Ebyte Electronic Technology Co., Ltd.                                                                                          E28-2G4M12S  User Manual 

Copyright ©2012–2018

Chengdu Ebyte Electronic  Technology Co.,Ltd.                                                                                                                                3   

                                                                                                                                                                     

 

2.Specification and parameter 

2.1 Limit parameter 

Main  parameter 

Performance 

Remark 

Min. 

Max. 

Power supply

V

 

3.6 

Voltage  over 3.6V will cause permanent 

damage  to module 

Blocking  power

dBm

 

10 

Chances of burn is slim when modules are 

used in short distance 

Operating temperature

 

-40 

85 

 

2.2 Operating parameter 

Main  parameter 

Performance 

Remark 

Min. 

Typ. 

Max. 

Operating voltage

V

 

1.8 

3.3 

3.6 

≥3.3 V ensures output power 

Communication level

V

 

-

 

 

3.3 

-

 

 

For 5V TTL, it may be at risk of burning down   

Operating temperature

 

-40 

85 

Industrial design 

Operating frequency

M Hz

 

2400 

2430 

2500 

Support ISM  band 

Power 

consumpti

on 

TX current

mA

 

-

 

 

45 

-

 

 

Instant power consumption 

RX current

mA

 

-

 

 

10 

-

 

 

Sleep current 

μA

 

-

 

 

2.0 

-

 

 

Software is shut down 

M ax Tx power

dBm

 

12 

12.5 

14 

-

 

 

Receiving  sensitivity

dBm

 

-126 

-128 

-130 

air data rate:595kbps 

Air data rate 

LoRa24

bps

 

0.476k 

202K 

Programming   

FLRC

bps

 

130k 

1.3M  

Programming 

FSK

bps

 

125k 

2M  

Programming 

 

 

Main  parameter 

Description 

Remark 

Distance for reference 

3000m 

Test condition

clear  and open area, antenna gain:  5dBi

antenna height:  2.5m

air data rate: 595kbps 

FIFO 

256Byte 

M ax length transmitted each time 

Crystal frequency  

52M Hz 

M odulation 

LoRa

TM

 (recommended)   

GFSK M ode 

FLRC M ode

LoRa M ode 

Package 

SM D 

Connector 

1.27mm 

IPEX/PCB 

Communication interface 

SPI 

0-10M bps 

Size 

25* 14*0.8 mm 

Antenna 

Stamp hole 

50 ohm impedance 

Summary of Contents for E28-2G4M12S

Page 1: ...E28 2G4M12S User Manual SX1280 2 4GHz SMD Wireless Module ...

Page 2: ... parameter 3 3 Size and pin definition 4 4 Basic operation 5 4 1 Hardware design 5 4 2 Software editing 5 5 Basic application 6 5 1 Basic circuit diagram 6 6 FAQ 6 6 1 Communication range is too short 6 6 2 Module is easy to damage 7 6 3 BER Bit Error Rate is high 7 7 Production guidance 7 7 1 Reflow soldering temperature 7 7 2 Reflow soldering curve 8 8 E28 Series 8 9 Antenna guidance 9 9 1Antenn...

Page 3: ...evelopment based on their own demands SX1280 also integrates time of flight for ranging functions Since the module is a pure RF transceiver module you need to use the MCU driver or a dedicated SPI debug tool 1 2 Features Communication distance tested is up to 3km Maximum transmission power of 18mW software multi level adjustable Compatible with BLE protocol Support the global license free ISM 2 4G...

Page 4: ... temperature 40 85 Industrial design Operating frequency MHz 2400 2430 2500 Support ISM band Power consumpti on TX current mA 45 Instant power consumption RX current mA 10 Sleep current μA 2 0 Software is shut down Max Tx power dBm 12 12 5 14 Receiving sensitivity dBm 126 128 130 air data rate 595kbps Air data rate LoRa24 bps 0 476k 202K Programming FLRC bps 130k 1 3M Programming FSK bps 125k 2M P...

Page 5: ...quest transmitting pin 6 NSS_CTS Input Modulechip selection pin used to start a SPI communication and can be used as UART clearing transmitting pin refer to SX1280 Datasheet 7 GND Ground connecting to power supply referenceground 8 GND Ground connecting to power supply referenceground 9 NRESET Input Chip reset initiation input pin valid under low level built in 50k pull up resistor 10 BUSY Output ...

Page 6: ...r it is wrong to randomly route over the Bottom Layer or other layers which will affect the module s spurs and receiving sensitivity to varying degrees It is assumed that there are devices with large electromagnetic interference around the module that will greatly affect the performance It is recommended to keep themaway from the module according to the strength ofthe interference If necessary app...

Page 7: ...d 5 Basic application 5 1 Basic circuit diagram 6 FAQ 6 1 Communication range is too short The communication distance will be affected when obstacle exists Data lose rate will be affected by temperature humidity and co channel interference The ground will absorb and reflect wireless radio wave so the performance will be poor when testing near groun d Sea water has great ability in absorbing wirele...

Page 8: ...perature 6 3 BER Bit Error Rate is high There are co channel signal interference nearby please be away from interference sources ormodify frequency and channel to avoid interference 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 7 Production guidance 7 1 Reflow soldering tem...

Page 9: ... Electronic Technology Co Ltd 8 7 2 Reflow soldering curve 8 E28 Series Model No IC Frequency Hz Tx power dBm Test distance km Package Size Antenna E28 2G4M20S SX1280 2 4G 20 6 SMD 15 26 5 IPEX PCB E28 2G4M12S SX1280 2 4G 12 5 3 SMD 25 14 IPEX PCB E28 2G4T12S SX1280 2 4G 12 5 3 SMD 17 5 28 7 IPEX PCB ...

Page 10: ... antennas for wireless modules with excellent performance and reasonable price Model No Type Frequency Hz Interface Gain dBi Height Cable Function feature TX2400 NP 5010 FCB antenna 2 4G SMA J 2 50 10mm FPC soft antenna TX2400 XP 150 Sucker 2 4G SMA J 3 5 15cm 150cm Sucker antenna High gain TX2400 JK 20 Rubber 2 4G SMA J 3 200mm Flexible omnidirectional TX2400 JK 11 Rubber 2 4G SMA J 2 5 110mm Fle...

Page 11: ...Initial version huaa 1 10 2018 5 23 Content updated huaa 1 20 2018 9 21 ModelNo split Huaa 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 orsuggestions info cdebyte com Fax 028 64146160 ext 821 Web www ebyte com Address Innovation Center D347 4 XI XIN Road Chengdu Sichuan Ch...

Reviews: