Ebyte E22-400T22D User manual

E22-400T22D User Manual
SX1268 433/470MHz 160mW LoRa Wireless Module

Chengdu Ebyte Electronic Technology Co.,Ltd. E22-400T22D User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd. 1
CONTENTS
1. OVERVIEW..................................................................................................................................... 3
1.1 INTRODUCTION.............................................................................................................................................................. 3
1.2 FEATURES......................................................................................................................................................................3
1.3 APPLICATION................................................................................................................................................................. 4
2. SPECIFICATION AND PARAMETER........................................................................................4
2.1 LIMIT PARAMETER....................................................................................................................................................... 4
2.2 OPERATING PARAMETER..............................................................................................................................................4
3. SIZE AND PIN DEFINITION........................................................................................................6
4. CONNECT TO MCU.......................................................................................................................7
5. FUNCTION DESCRIPTION..........................................................................................................8
5.1 FIXED TRANSMISSION.................................................................................................................................................... 8
5.2 BROADCASTING TRANSMISSION.................................................................................................................................... 8
5.3 BROADCASTING ADDRESS............................................................................................................................................. 8
5.4 MONITOR ADDRESS....................................................................................................................................................... 9
5.5 RESET............................................................................................................................................................................ 9
5.6 AUX DESCRIPTION........................................................................................................................................................ 9
5.6.1 Indication of UART output..................................................................................................................................... 9
5.6.2 Indication of wireless transmitting...................................................................................................................... 10
5.6.3 Configuration procedure of the module............................................................................................................... 10
5.6.4 Notes for AUX...................................................................................................................................................... 10
6. OPERATING MODE....................................................................................................................11
6.1 MODE SWITCHING........................................................................................................................................................11
6.2 NORMAL MODE（MODE 0）...................................................................................................................................... 12
6.3 WOR MODE（MODE 1）........................................................................................................................................... 12
6.4 CONFIGURATION MODE（MODE 2）..........................................................................................................................12
6.5 DEEP SLEEP MODE（MODE 3）.................................................................................................................................. 13
7. REGISTER READ AND WRITE CONTROL............................................................................13
7.1 COMMAND FORMAT.................................................................................................................................................... 13
7.2 REGISTER DESCRIPTION............................................................................................................................................... 14
7.3 FACTORY DEFAULT PARAMETER..................................................................................................................................16
8. REPEATER NETWORKING MODE......................................................................................... 16

Chengdu Ebyte Electronic Technology Co.,Ltd. E22-400T22D User Manual
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9. CONFIGURATION INSTRUCTIONS ON COMPUTER.........................................................18
10. HARDWARE DESIGN............................................................................................................... 19
11. FAQ................................................................................................................................................20
11.1 COMMUNICATION RANGE IS TOO SHORT................................................................................................................... 20
11.2 MODULE IS EASY TO DAMAGE...................................................................................................................................20
11.3 BER(BIT ERROR RATE)IS HIGH................................................................................................................................20
12. WELDING GUIDANCE............................................................................................................. 21
13. E22 SERIES..................................................................................................................................21
14. ANTENNA GUIDANCE..............................................................................................................21
14.1 ANTENNA RECOMMENDATION................................................................................................................................... 21
REVISION HISTORY....................................................................................................................... 22
ABOUT US......................................................................................................................................... 22

Chengdu Ebyte Electronic Technology Co.,Ltd. E22-400T22D User Manual
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1. Overview
1.1 Introduction
E22-400T22D is a wireless serial port module (UART) based on
SEMTECH's SX1268 RF chip. It has multiple transmission modes, working
in the 410.125MHz~493.125MHz, frequency (default 433.125MHz), LoRa
spread spectrum technology, TTL level output, compatible with 3.3V and 5V
IO port voltage.
E22-400T22D uses a new generation of LoRa spread spectrum technology. Compared with the traditional SX1278
solution, the SX1268 solution has a longer transmission distance, faster speed, lower power consumption and smaller
size. It Supports wake-up over air, wireless configuration, carrier monitoring, automatic relay, communication key and
other functions, supports sub-package length setting, and can provide custom development services.
1.2 Features
Develop a new LoRa spread spectrum modulation technology based on SX1268,which will bring longer
communication distance and stronger anti-interference ability;
Support automatic relay networking, multi-level relay is suitable for ultra-long distance communication, multiple
networks running in the same area are running simultaneously;
Support users to set their own communication keys, which cannot be read, greatly improving the confidentiality of
user’s data;
Support LBT function, monitor the channel environmental noise before sending, which can greatly improve the
communication success rate of the module in harsh environments;
Support RSSI signal strength indication function for evaluating signal quality, improving communication network,
ranging;
Support wireless parameter configuration, send command data packets wirelessly, remotely configure or read
wireless module parameters;
Support wake-up over air, that is, ultra-low power consumption function, suitable for battery-powered applications;
Supports fixed-point transmission, broadcast transmission, and channel monitoring;
Supports deep hibernation, and the whole machine consumes about 2uA in this mode;
Support the global license-free ISM 433MHz band and 470MHz meter reading frequency band;
Under ideal conditions, the communication distance can reach 5km;
The parameters are saved when power off, and the module will work according to the set parameters after power
on again;
Efficient watchdog design, once an exception occurs, the module will automatically restart and continue to work
according to the previous parameter settings;
Support data transmission rate of 0.3k ～62.5kbps;
Support 2.3 ~ 5.5V power supply, power supply over 5V can ensure the best performance;
Industrial grade standard design, support long-term from at -40 ～+ 85 ℃;
The size and shape are consistent with our E32 series modules, which can be directly replaced to improve product
performance and distance.

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1.3 Application
Home security 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.
2. Specification and parameter
2.1 Limit parameter
Main parameter
Performance
Remark
Min.
Max.
Power supply（V）
0
5.5
Voltage over 5.5V 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
Industrial grade
2.2 Operating parameter
Main parameter
Performance
Remark
Min.
Typ.
Max.
Operating voltage（V）
2.3
5.0
5.5
≥5.0 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）
410.125
433.125
493.125
Support ISM band
Power
consu
mption
TX current（mA）
-
110
-
Instant power consumption
RX current（mA）
-
12
-
-
Sleep current（μA）
-
2
-
Software is shut down
Max Tx power（dBm）
21.5
22.0
22.5
-
Receiving sensitivity（dBm）
-146
-147
-148
Air data rate is 0.3 kbps
Air data rate（bps）
0.3k
2.4k
62.5k
Controlled via user’s programming

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Main parameter
Description
Remark
Distance for reference
5km
Test condition：clear and open area, antenna gain: 5dBi，antenna height:
2.5m，air data rate: 2.4kbps
TX length
240 Byte
Can be configured via command as 32/64/128/240 bytes per packet to
transmit
Buffer
1000 Byte
-
Modulation
LoRa
New generation LoRa modulation technology
Communication interface
UART
TTL level
Package
DIP
-
Connector
1*7*2.54mm
-
Size
21*36 mm
-
Antenna
SMA
50 ohm impedance

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3. Size and pin definition
No.
Name
Direction
Function
1
M0
Input
（weak pull-up）
Work with M1 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
2
M1
Input
（weak pull-up）
Work with M0 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
3
RXD
Input
TTL UART input, connects to external TXD output pin.
4
TXD
Output
TTL UART output, connects to external RXD input pin.
5
AUX
Output
To indicate module ’ s working status & wakes up the external MCU. During
the procedure of self-check initialization, the pin outputs low level.

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(suspending is allowed).
6
VCC
Power supply
Module power supply positive reference, voltage range: 2.3 ～5.5V DC
7
GND
Power supply
Ground
8
Fixed hole
Fixed hole（Connect to GND on the module）
9
Fixed hole
Fixed hole（Connect to GND on the module）
10
Fixed hole
Fixed hole（Connect to GND on the module）
4. Connect to MCU
No.
Description（STM8L MCU）
1
The UART module is TTL level, please connect with TTL level MCU.
2
For some MCU works at 5V DC, it may need to add 4～10K pull-up resistor for the TXD & AUX pin.

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5. Function description
5.1 Fixed transmission
5.2 Broadcasting transmission
5.3 Broadcasting address
For example: Set the address of module A as 0xFFFF, and the channel as 0x04;
When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the

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purpose of broadcast is realized.
5.4 Monitor address
For example: Set the address of module A as 0xFFFF, and the channel as 0x04;
When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of
monitor is realized.
5.5 Reset
When the module is powered on, AUX outputs low level immediately, conducts hardware self-check and sets the
operating mode based on user’s parameters. During the process, the AUX remains low level. After the process
completed, the AUX outputs high level and starts to work as the operating mode combined by M1 and M0.
Therefore, users need to wait the AUX rising edge as the start of module’s normal work.
5.6 AUX description
AUX Pin can be used as indication for wireless sending & receiving buffer and self-check.
It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been
sent through UART, or whether the module is still in the process of self-check initialization.
5.6.1 Indication of UART output
To wake up external MCU