Ebyte E28-2G4M12S User Manual
E28-2G4M12S User Manual
SX1280 2.4GHz SMD Wireless Module
Chengdu Ebyte Electronic Technology Co., Ltd. E28-2G4M12S User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd. 1
目录
1. Overview................................................................................................................................................................................................2
1.1 Brief introduction ......................................................................................................................................................................2
1.2 Features .......................................................................................................................................................................................2
1.3 Application .................................................................................................................................................................................2
2.Spec ification and para meter ................................................................................................................................................................3
2.1 Limit parameter .........................................................................................................................................................................3
2.2 Operating para meter .................................................................................................................................................................3
3.Size and pin definition ..........................................................................................................................................................................4
4.Basic operation.......................................................................................................................................................................................5
4.1 Hardware design ................................................................................................................................................................5
4.2 Software ed iting ........................................................................................................................................................................5
5.Basic application .........................................................................................................................................................................6
5.1 Basic circuit diagram ................................................................................................................................................................6
6.FA Q..........................................................................................................................................................................................................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 te mperature .................................................................................................................................................7
7.2 Reflow soldering curve ............................................................................................................................................................8
8.E28 Series ...............................................................................................................................................................................................8
9.Antenna guidance ..................................................................................................................................................................................9
9.1 Antenna recommendation ........................................................................................................................................................9
9.2 Antenna selection ......................................................................................................................................................................9
Revision history ..................................................................................................................................................................................... 10
About us .................................................................................................................................................................................................. 10
Chengdu Ebyte Electronic Technology Co., Ltd. E28-2G4M12S User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd. 2
1. Overview
1.1 Brief introduction
E28-2G4M12S is a 2.4GHz bluetooth module designed by Chengdu Ebyte,with long distance and ultra -low power
consumption. E28-2G4M12S is small-sized SMD module(pin spacing 1.27mm),built-in PCB antenna and IPEX antenna.
High precision 52MHz crystal is used.
Based on the original imported RF chip SX1278 from SEMTECH,T h e
IC SX1280 features multiple physical layers and various modulating
methods such as LoRa, FLRC and GFSK, the special modulating methods
and processing ways enable longer operating range under LoRa and FLRC
modulating methods, and the GFSK method covers BLE protocol. The
outstanding ultra-low power consumption and the DC-DC and Time-of-
Flight on chip make the chip much more capable for smart home, security
system, tracking and locating, wireless d istance measuring, wearable
electronics, smart bracelet and health management & etc. SX1280 supports RSSI,users need to conduct a secondary
development based on their own demands ;SX1280 also integrates time of flight for ranging functions .
Since the module is a pure RF trans ceiver 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 licens e-free ISM 2.4GHz band；
Support air date rate of 0.476kbps ～2Mbps；
Support multiple modulation methods, (GFSK Mode ，FLRC Mode，LoRa Mode)；
Large capacity FIFO, s upports 256Byte data buffer；
Support 1.8V~3.6V power supply, power supply over 3.3V can guarantee the best performance ；
Industrial grade s tandard design, support -40 ~ 85 °C for working over a long time；
IPEX and PCB antenna optional, good for s econdary development and integration ；
The air data rate is adjustable, the maximu m air data rate is up to 1.3 Mbps in FLRC mode；
Excellent anti-blocking properties；
Ranging, with Time-of-flight function.
1.3 Application
Home s ecurity alarm and remote keyless entry；
Smart home and industrial sensors ；
Wireless alarm security system；
Building automation solutions ；
Wireless industrial-grade remote control；
Health care products；
Advanced Meter Reading Architecture(AMI)；
Automotive industry applications.
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）
0
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（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
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
Max length transmitted each time
Crystal frequency
52MHz
-
Modulation
LoRaTM (recommended)
GFSK Mode ，FLRC Mode，LoRa Mode
Package
SMD
-
Connector
1.27mm
IPEX/PCB
Communication interface
SPI
0-10Mbps
Size
25* 14*0.8 mm
-
Antenna
Stamp hole
50 ohm impedance
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