Ebyte E280-2G4T12S User manual

E280-2G4T12S User Manual
SX1280 2.4GHz TTL High-speed LoRa Wireless Module

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 1
Contents
Disclaimer.............................................................................................................................................................3
1 Introduction........................................................................................................................................................4
1.1 Brief Introduction........................................................................................................................................4
1.2 Features.......................................................................................................................................................4
1.3 Application Scenario...................................................................................................................................5
2 Specifications.....................................................................................................................................................5
2.1 Limit parameters......................................................................................................................................... 5
2.2 Working parameters....................................................................................................................................5
3 Hardware description.........................................................................................................................................7
3.1 Mechanical size and pin definition............................................................................................................. 7
4 Recommended connection diagram...................................................................................................................8
5 Detailed function................................................................................................................................................9
5.1 Fixed-point launch.................................................................................................................................9
5.2 Broadcast launch....................................................................................................................................9
5.3 Broadcast address.................................................................................................................................. 9
5.4 Listening address................................................................................................................................. 10
5.5 Module reset........................................................................................................................................ 10
5.6 AUX detailed.......................................................................................................................................10
5.6.1 Serial data output indication.................................................................................................................. 10
5.6.2 Wireless transmission instructions.........................................................................................................10
5.6.3 The module is being configured............................................................................................................ 11
6 Operating mode............................................................................................................................................... 11
6.1 Mode switch........................................................................................................................................ 11
6.2 Transmission mode (mode 0).............................................................................................................. 12
6.3 RSSI mode (mode 1)........................................................................................................................... 12
6.4 Ranging mode (mode 2)...................................................................................................................... 12
6.5 Configuration mode (mode 3)............................................................................................................. 13
7 Instruction format............................................................................................................................................ 13
7.1 Factory default parameters.................................................................................................................. 13

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 2
7.2 Work parameter reading...................................................................................................................... 14
7.3 Version number reading...................................................................................................................... 14
7.4 Reset instruction.................................................................................................................................. 14
7.5 Parameter setting command.................................................................................................................14
8 Hardware design.............................................................................................................................................. 16
9 Common problem............................................................................................................................................ 17
9.1 Transmission distance is not ideal....................................................................................................... 17
9.2 Module is easy to damage................................................................................................................... 17
9.3 The error rate is too high..................................................................................................................... 17
10 Welding operation guidance.......................................................................................................................... 18
10.1 Reflow temperature.................................................................................................................................18
10.2 Reflow solder curve diagram.................................................................................................................. 18
11 Related model................................................................................................................................................ 19
12 Antenna Guide............................................................................................................................................... 19
12.1 Antenna recommended........................................................................................................................... 19
12.2 Antenna selection....................................................................................................................................20
13 Batch packaging.............................................................................................................................................20
Revision history.................................................................................................................................................. 20
About us..............................................................................................................................................................21

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 3
Disclaimer
EBYTE reserves all rights to this document and the information contained herein.
Products, names, logos and designs described herein may in whole or in part be
subject to intellectual property rights. Reproduction, use, modification or disclosure to
third parties of this document or any part thereof without the express permission of
EBYTE is strictly prohibited.
The information contained herein is provided “as is” and EBYTE assumes no
liability for the use of the information. No warranty, either express or implied, is given,
including but not limited, with respect to the accuracy, correctness, reliability and
fitness for a particular purpose of the information. This document may be revised by
EBYTE at any time. For most recent documents, visit www.ebyte.com.

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 4
1 Introduction
1.1 Brief Introduction
E280-2G4T12S is a wireless serial port module (UART) based on
SEMTECH's SX1280 RF chip, transparent transmission mode, working
in 2.4GHz frequency band, with LoRa, FLRC and GFSK three
modulation and demodulation technologies, TTL level output,
compatible with 3.3 IO port voltage of V and 5V.
E280-2G4T12S adds a wireless ranging function on the basis of the traditional serial port module. Based on an
improved binary backoff algorithm, it uses adaptive frequency hopping technology to integrate Kalman filtering, which
can effectively resist wireless interference and improve the ranging accuracy.
LoRa direct sequence spread spectrum technology will bring longer communication distance, and has the
advantages of wider power spectrum and strong anti-interference ability. The module has a hardware FEC forward error
correction algorithm, which has high coding efficiency and strong error correction ability. In the case of sudden
interference, it can actively correct the interfered data packet, which greatly improves the reliability and transmission
distance.
The module has data encryption and compression functions. The data transmitted by the module in the air is random,
and the data interception is meaningless through strict encryption and decryption algorithms. The data compression
function has the possibility to reduce the transmission time, reduce the probability of interference, and improve the
reliability and transmission efficiency.
1.2 Features
Support multiple modulation methods of LoRa, FLRC, GFSK;
Support high-speed continuous transmission at 460800 serial port baud rate, data is not sub-packaged, and the
package length is not limited;
Support RSSI signal strength reading;
Support fixed-point transmission/broadcast transmission/channel monitoring;
Support wireless ranging function, ranging accuracy of ±2 meters;
Under ideal conditions, the communication distance can reach 3km;
The maximum transmission power is 18mW, and the software is multi-level adjustable;
Support the global license-free ISM 2.4GHz frequency band;
Support the data air transmission rate of 1kbps～2Mbps;
Support low power consumption mode, suitable for battery applications;
Support 2.3~5.5V power supply, power supply greater than 5V can guarantee the best performance;

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
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Industrial-grade standard design, supporting long-term use at -40～+85℃;
Dual antennas are optional (PCB/IPEX), which is convenient for users to develop and integrate.
1.3 Application Scenario
Smart home and industrial sensors, etc.;
Security system, positioning system;
Positioning of agriculture and animal husbandry;
Wireless remote control, UAV;
Wireless game remote control;
Medical and healthcare products;
Wireless voice, wireless headset;
Application in the automotive industry.
2 Specifications
2.1 Limit parameters
Main Parameters
Performance- Minimum
Performance- Max
Remark
Power supply voltage
(V)
0
5.5
Over 5.5V will permanently burn the module
Blocking power
(dBm)
-
10
It is less likely to burn when used at close range
Working temperature
(℃)
-40
+85
Industrial grade
2.2 Working parameters
Main Parameters
Performance
Remark
Min
Type
Max
Working voltage (V)
2.3
5.0
5.5
≥5.0V can guarantee output power
Communication level (V)
3.3
Using 5V TTL is risky to burn
Working temperature (℃)
-40
-
+85
Industrial design
Working frequency (MHz)
2400
-
2500
Support ISM frequency band
Power
consumption
Emission current (mA)
46
Instantaneous power consumption
Receiving current (mA)
20
Sleep current (μA)
8
Software shutdown
Maximum transmit power (dBm)
11.5
12.0
13.5
Receiving sensitivity (dBm)
-130
-132
-134
Air rate is 1kbps

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
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Air rate (bps)
1k
1k
2M
User programming control
Main Parameters
Description
Remark
Reference distance
3000m
Clear and open environment, antenna gain 5dBi, antenna height 2.5 meters,
air rate 1kbps
Launch length
121 Btye
Normal mode, using 1Mbps airspeed
221 Btye
Continuous transmission mode
Modulation
GFSK
LoRa
FLRC
Communication Interface
UART Serial port
TTL Level
Encapsulation method
SMD
Interface method
1.27mm
Dimensions
17.5*28.7mm
Antenna interface
IPEX/PCB
Equivalent impedance is about 50Ω

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
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3 Hardware description
3.1 Mechanical size and pin definition
Pin
number
Pin
name
Pin
direction
Pin usage
1
GND
Reference
place
Module ground
2
NC
Empty feet not connected
3
M0
enter
The combination of M2, M1, and M0 determines the 8 working modes of the module (cannot be
suspended, if not used, it can be grounded)
4
M1
enter
The combination of M2, M1, and M0 determines the 8 working modes of the module (cannot be
suspended, if not used, it can be grounded)
5
M2
enter
The combination of M2, M1, and M0 determines the 8 working modes of the module (cannot be
suspended, if not used, it can be grounded)
6
RXD
enter
TTL serial port input, connected to the external TXD output pin; can be configured as open-drain or
pull-up input, see parameter settings for details
7
TXD
Output
TTL serial port output, connected to the external RXD input pin; can be configured as open-drain or
push-pull output, see parameter settings for details

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
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8
AUX
Output
Used to indicate the working status of the module, the user wakes up the external MCU, and outputs
low level during the power-on self-check initialization period. It can be configured as an open-drain
output or push-pull output. For details, see parameter settings (can be left floating)
9
VCC
Module power supply positive reference, voltage range: 2.3V ~ 5.5V DC
10
GND
Reference
place
Module ground
11
GND
Reference
place
Module ground
12～19
NC
Empty feet not connected
20
GND
Reference
place
Module ground
4 Recommended connection diagram
Serial number
Brief description of the connection between the module and the microcontroller (the picture above takes the
STM8L microcontroller as an example)
1
The wireless serial port module is TTL level, please connect with TTL level MCU.
2
For some 5V microcontrollers, it may be necessary to add 4-10K pull-up resistors to the TXD and AUX pins
of the module.

Chengdu Ebyte Electronic Technology Co.,Ltd. E280-2G4T12S User Manual
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5 Detailed function
5.1 Fixed-point launch
5.2 Broadcast launch
5.3 Broadcast address
Example: Set the address of module A to 0xFFFF and the channel to 0x04.
When module A is used as a transmitter (same mode, transparent transmission mode), all receiving modules under the 0x04