Ebyte E22-230TXXS User manual

Chengdu Ebyte Electronic Technology Co., Ltd. E22-230TXXS User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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E22-230TXXS User Manual
SX1262 230MHz LoRa Wireless Module

Chengdu Ebyte Electronic Technology Co., Ltd. E22-230TXXS User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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DISCLAIMER ............................................................................................................................................ 4
1. OVERVIEW ............................................................................................................................................5
1.1 INTRODUCTION ....................................................................................................................................................................................... 5
1.2 FEATURES.................................................................................................................................................................................................5
1.3 APPLICATION........................................................................................................................................................................................... 6
2. SPECIFICATION AND PARAMETER ............................................................................................ 6
2.1 LIMIT PARAMETER..................................................................................................................................................................................6
2.2 OPERATING PARAMETER....................................................................................................................................................................... 7
2.3 HARDWARE PARAMETER.......................................................................................................................................................................7
3 SIZE AND PIN DEFINITION ..............................................................................................................8
3.1 E22-230T22S PINS ................................................................................................................................................................................ 8
3.2 E22-230T30/33S PINS.......................................................................................................................................................................... 9
4. CONNECT TO MCU .......................................................................................................................... 11
4.1 E22-230T22S.......................................................................................................................................................................................11
4.2 E22-230T30/33S................................................................................................................................................................................. 12
5 FUNCTION DESCRIPTION ............................................................................................................. 12
5.1 FIXED TRANSMISSION .........................................................................................................................................................................12
5.2 BROADCASTING TRANSMISSION .......................................................................................................................................................13
5.3 BROADCASTING ADDRESS................................................................................................................................................................. 13
5.4 MONITOR ADDRESS.............................................................................................................................................................................13
5.5 RESET ..................................................................................................................................................................................................... 13
5.6 AUX DESCRIPTION..............................................................................................................................................................................13
5.6.1 Indication of UART output ....................................................................................................................................................... 14
5.6.2 Indication of wireless transmitting .........................................................................................................................................14
5.6.3 Configuration procedure of module ..........................................................................................................................................0
5.6.4 Notes for AUX ................................................................................................................................................................................ 0
6 OPERATING MODE ............................................................................................................................. 0
6.1 MODE SWITCHING ..................................................................................................................................................................................0
6.2 NORMAL MODE（MODE 0）.............................................................................................................................................................. 1
6.3 WOR MODE（MODE 1） .................................................................................................................................................................... 1
6.4 CONFIGURATION MODE（MODE 2）................................................................................................................................................ 2
6.5 DEEP SLEEP MODE（MODE 3） ......................................................................................................................................................... 2

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7 REGISTER READ AND WRITE CONTROL ..................................................................................2
7.1 COMMAND FORMAT...............................................................................................................................................................................2
7.2 REGISTER DESCRIPTION ........................................................................................................................................................................3
7.3 FACTORY DEFAULT PARAMETER.......................................................................................................................................................... 6
8 REPEATER NETWORKING MODE ................................................................................................ 6
9 CONFIGURATION INSTRUCTIONS ON COMPUTER .............................................................. 7
10 HARDWARE DESIGN ........................................................................................................................ 8
11 FAQ .......................................................................................................................................................... 9
11.1 COMMUNICATION RANGE IS TOO SHORT.........................................................................................................................................9
11.2 MODULE IS EASY TO DAMAGE ..........................................................................................................................................................9
11.3 BER(BIT ERROR RATE)IS HIGH .......................................................................................................................................................9
12 PRODUCTION GUIDANCE ..............................................................................................................9
12.1 REFLOW SOLDERING TEMPERATURE............................................................................................................................................... 9
12.2 REFLOW SOLDERING CURVE........................................................................................................................................................... 10
13 E22 SERIES ......................................................................................................................................... 10
14 ANTENNA RECOMMENDATION ................................................................................................ 11
15 PACKAGE FOR BATCH ORDER ................................................................................................. 11
REVISION HISTORY ............................................................................................................................ 12
ABOUT US ................................................................................................................................................ 12

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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.cdebyte.com.

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1. Overview
1.1 Introduction
E22-230TXXS is a wireless serial port module (UART) based on SEMTECH's SX1262 RF chip. It has multiple
transmission modes, working in the 220.125MHz~236.125MHz, (default 230.125MHz), LoRa spread spectrum
technology, TTL level output, compatible with 3.3V and 5V IO port voltage.
Compared with SX1276 module, the SX1262 has a longer transmission distance, faster speed, lower power consumption
and smaller volume; It supports air wake-up, wireless configuration, carrier monitoring, automatic relay, communication
key and other functions, as well as packet length setting, and can provide customized development services.
1.2 Features
The new LoRa technology is developed based on SX1262, which brings a longer communication distance and stronger
anti-interference capability;
Automatic relay networking, multi-level relay is applicable to ultra long distance communication, and multiple networks run in
the same area at the same time;
Users can set their own communication keys, which can not be read, greatly improving the confidentiality of user data;
LBT function to monitor the channel environmental noise before transmission, which can greatly improve the communication
success rate of the module in harsh environments;
RSSI signal strength indication available, which is used to evaluate signal quality, improve communication network and range
measurement;
Wireless parameter configuration to send command data packets via wireless, and remotely configure or read wireless module
parameters;

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Supports air wake-up, that is, ultra-low power consumption function, suitable for battery powered applications;
Supports fixed point transmission, broadcast transmission and channel monitoring;
In deep sleep mode，power consumption for the module is about 2uA；
230MHz frequency band，penetration ability better than 433MHz；
With PA+ LNA, communication distance tested is up to 12km;
The parameters are auto-saved once power off, the module will work according to the previously set parameters;
Air date rate: 0.3kbps～15.6kbps;
3.3V~5.5V power supply, power supply over 5V can guarantee the best performance;
Industrial grade standard design, support -40 ~ 85 °C for working over a long time;
IPEX and stamp hole optional, good for secondary development and integration;
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
RF parameter
Unit
Model No.
Remarks
E22-230T22S
E22-230T30S
E22-230T33S
Operating
frequency
GHz
220.125 - 236.125
ISM band
TX power
dBm
22.0±0.5
30.0±0.5
33.0±0.5
Block power
dBm
0 ~ 10.0
Chances to burn is slim when used in
short distance
Receiving
sensitivity
dBm
-147±1.0
Air data rate 2.4kbps
Tested distance
Km
5
10
12
Test condition：clear and open area,
antenna gain: 5dBi，antenna height:
2.5m，air data rate: 2.4kbps
Air data rate
bps
0.3k~15.6k
Controlled via user’s programming

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2.2 Operating parameter
Electric
parameter
Unit
Model No.
Remarks
E22-230T22S
E22-230T30S
E22-230T33S
Operating level
V
2.3~5.5V
3.3~5.5V
3.3~5.5V
≥3.3V ensures output power
Communication
level
V
3.3
For 5V TTL, it may be at risk
of burning down
TX current
mA
122
530
990
Instant power consumption
RX current
mA
13
14
15
Sleep current
uA
2
Software is shut down
Operating
temperature
℃
-40 ~ +85
Industrial design
2.3 Hardware parameter
Main
parameter
E22-230T22S
E22-230T30S
E22-230T33S
Remarks
Size
16*26 mm
25*40.5mm
25*40.5mm
TX length
240 Byte
Sub-packing 32/64/128/240 byte to send via
command
Buffer
1000 Byte
Modulation
LoRa
New generation LoRa
Communica
tion
interface
UART
TTL
Package
SMD，stamp hole, 1.27/2.54mm pitch
Pitch
1.27mm
1.27mm
2.54mm
PA+LNA
×
√
√
Built-in PA+LNA
Antenna
IPEX/Stamp hole
50 ohm impedance

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3 Size and pin definition
3.1 E22-230T22S pins
No.
Name
Direction
Function
1
NC
N/A
2
GND
-
Module ground
3
NC
-
N/A
4
NC
-
N/A
5
NC
-
N/A
6
NC
-
N/A
7
NC
-
N/A
8
GND
-
Module ground
11
GND
-
Module ground
12
ANT
-
Antenna(high frequency signal output，50 ohm）
13
GND
-
Module ground
14
GND
-
Module ground
15
GND
-
Module ground
16
GND
-
Module ground
19
GND
-
Module ground
20
M0
Input（weak
Work with M1 to decide 4 working modes of module (not suspended, if not used, could

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pull-up）
be grounded).
21
M1
M1 Input（weak
pull-up）
Work with M0 to decide 4 working modes of module (not suspended, if not used, could
be grounded).
22
RXD
Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin.
23
TXD
Output
TTL UART inputs, connects to external (MCU, PC) RXD output pin.
24
AUX
Output
Used to indicate the working state of the module;
The user wakes up the external MCU and outputs low level during power on self-test
initialization; (can be suspended)
25
VCC
-
Module power supply positive reference，Power supply：2.3～5.5V DC
26
GND
-
Module ground
3.2 E22-230T30/33S pins

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No.
Name
Direction
Function
1
GND
-
Module ground
2
VCC
-
Module power supply positive reference，Power supply：3.3～5.5V DC
3
AUX
Output
The user wakes up the external MCU and outputs low level during power on
self-test initialization; (can be suspended)
4
TXD
Output
TTL UART outputs, connects to external (MCU, PC) RXD input pin.
5
RXD
Input
TTL UART inputs, connects to external (MCU, PC) RXD output pin.
6
M1
Input（weak pull-up）
Work with M1 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
7
M0
Input（weak pull-up）
Work with M0 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
11
ANT
Output
Antenna(high frequency signal output，50 ohm）
12
GND
-
Ground
13
GND
-
Ground
14
GND
-
Ground
18
NC
-
Empty
19
NC
-
Empty
20
NC
-
Empty
21
+3.3V
-
Power pin when program is loading（suspend, no need to connect，cannot be
used as power supply）
22
NC
-
Empty
23
GND
-
Module Ground
24
NC
-
Empty

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4. Connect to MCU
4.1 E22-230T22S

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4.2 E22-230T30/33S
5 Function description
5.1 Fixed transmission

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5.2 Broadcasting transmission
5.3 Broadcasting address
For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the purpose of
broadcast is realized.
5.4 Monitor address
For example: Set the address of module A as 0xFFFF or 0x0000, 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, 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 per 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 send & receive buffer and self-check.

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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
5.6.2 Indication of wireless transmitting
Buffer (empty): the internal 1000 bytes data in the buffer are written to the RFIC (Auto sub-packaging). When AUX=1, the user
can input data less than 1000 bytes continuously without overflow. Buffer (not empty): when AUX=0, the internal 1000 bytes data in
the buffer have not been written to the RFIC completely. If the user starts to transmit data at this circumstance, it may cause overtime
when the module is waiting for the user data, or transmitting wireless sub package.When AUX = 1, it does not mean that all the UART
data of the module have been transmitted already, perhaps the last packet of data is still in transmission.

0
5.6.3 Configuration procedure of module
Only happened when power-on resetting or exiting sleep mode
5.6.4 Notes for AUX
No.
Description
1
For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means if it
meets each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX outputs
high level.
2
When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since AUX
outputs high level, the mode switch will be completed.
3
After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for 2ms . If
AUX stays on the high level, the operating mode switch can be effected immediately.
4
When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will reset
user parameters, during which AUX outputs low level.
6 Operating mode
There are four operating modes, which are set by M1 and M0, the details are as follows:
Mode(0-3)
M1
M0
Description
Remark
0 Normal mode
0
0
UART and wireless channel are open, transparent transmission
is on
Supports configuration over air via
special command
1 WOR mode
0
1
Can be defined as WOR transmitter and WOR receiver
Supports wake up over air
2 Configuration mode
1
0
Users can access the register through the serial port to control
the working state of the module
3 Deep sleep mode
1
1
Sleep mode
6.1 Mode switching
No.
Remark

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Users can combine M1 and M0 with high and low levels to determine the operating mode. Two GPIOs of the MCU can
be used to control mode switching;
After changing M1 and M0: If the module is idle, after 1ms, it can start working according to the new mode;
If the serial port data of the module has not been transmitted through the wireless, the new working mode can be
switched after the transmission is completed;
If the module receives the wireless data and transmits the data through the serial port, it needs to finish transmission
before switching the new working mode;
Therefore, mode switching can only be valid when AUX output is 1, otherwise it will delay switching.
2
For example, users continuously inputs a large amount of data and simultaneously performs mode switching. At this
time, the switching mode operation is invalid; the module will process all the user data before performing the new mode
detection;
Therefore, the general recommendation is to detect the output state of the AUX pin and switch after 2ms when the
output is high.
3
When the module is switched from other modes to sleep mode, if the data has not been processed yet;
The module will process these data (including receiving and sending) before entering sleep mode. This feature can be
used for fast sleep, which saves power; for example, the transmitter module works in mode 0, the user transmits the
serial port data "12345", and then does not have to wait for the AUX pin to be idle (high level), and can directly switch
to sleep mode. And the user's main MCU immediately sleeps, the module will automatically transmit the user data
through the wireless, and automatically enters sleep within 1ms;
This saves MCU's working time and reduces power consumption.
4
Similarly, any mode switching can use this feature. After the module processes the current mode event, it will
automatically enter the new mode within 1ms; thus eliminating the need for the user to query AUX and achieve the
purpose of fast switching;
For example, switching from the transmit mode to the receive mode; the user MCU can also enter sleep before the mode
switch, and use the external interrupt function to acquire the AUX change, thereby performing mode switching.
5
This operation mode is very flexible and efficient, and is designed according to the user's MCU's operation convenience,
and can reduce the workload of the entire system as much as possible, improve system efficiency, and reduce power
consumption.
6.2 Normal mode（Mode 0）
Type
M0 = 0，M1 = 0
Transmitting
Users can input data through the serial port and the module will start wireless transmission.
Receiving
The module wireless receiving function is turned on, and after receiving the wireless data, it will be output through the serial
port TXD pin.
6.3 WOR mode（Mode 1）
Type
M0 = 1，M1 =0

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Transmitting
When defined as a transmitting party, a preamble is automatically added before transmitting.
Receiving
It can receive data normally, the receiving function is the same as mode 0.
6.4 Configuration mode（Mode 2）
Type
M0 = 0，M1 = 1
Transmitting
Wireless transmitting off
Receiving
Wireless receiving off
Configuration
Users can access the registers to configure the module's operation state.
6.5 Deep sleep mode（Mode 3）
Type
M0 = 1，M1 = 1
Transmitting
Unable to transmit wireless data
Receiving
Unable to receive wireless data
Note
When from the sleep mode to other modes, the module will reconfigure the parameters. During the configuration process,
AUX will remain low; After configuration,it outputs high level, we suggest that user test rising edge T_BUSY.
7 Register read and write control
7.1 Command format
In configuration mode (mode 2: M1 = 1, M0 = 0), the list of supported commands are as follows (only 9600, 8N1 format is
supported when)：
No.
Command format
Description
1
Set register
Command: C0+starting address+length+parameters
Response: C1+starting address+length+parameters
E.g 1: Channel is 0x09
command starting address length parameter
Send: C0 05 01 09

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Returen: C1 05 01 09
E.g 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1) and air data rate
(1.2K).
Send: C0 00 04 12 34 00 61
Return: C1 00 04 12 34 00 61
2
Read register
Command: C1+starting address+parameters
Response: C1+starting address+length+parameters
E.g 1：Read channel
command starting address length parameter
Send: C1 05 01
Returen: C1 05 01 09
E.g 2: Read module address, network address, serial port and air data rate.
Send: C1 00 04
Return: C1 00 04 12 34 00 61
3
Set temporary
registers
Command: C2+starting address+parameters
Response: C1+starting address+length+parameters
E.g 1: Channel is 0x09
command starting address length parameter
Send: C2 05 01 09
Returen: C1 05 01 09
E.g 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1) and air data rate
(1.2K).
Send: C2 00 04 12 34 00 61
Return: C1 00 04 12 34 00 61
5
Wireless
configuration
Command: CF CF + normal command
Respond：CF CF + normal respond
E.g 1: Channel is 0x09
Command head command starting address length parameter
Send: CF CF C0 05 01 09
Returen: CF CF C1 05 01 09
E.g 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1) and air data rate
(1.2K).
Send: CF CF C2 00 04 12 34 00 61
Return: CF CF C1 00 04 12 34 00 61
6
Wrong format
Wrong format respond: FF FF FF
7.2 Register description
Address
Read or
write
Name
Description
Remark
00H
Read/Wr
ite
ADDH
ADDH（default 0）
The module address is high byte and low byte. Note:
When the module address is FFFF, it can be used as
the broadcast and monitor address, that is the module
will not perform address filtering.
01H
Read/Wr
ite
ADDL
ADDL（default 0）
02H
Read/Wr
ite
NETID
NETID（default 0）
Network address, used to distinguish the network.
When communicating with each other, they should be
set to the same.

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03H
Read/Wr
ite
REG0
7，6，5 UART: Serial port rate（bps）
000: 1200
001: 2400
010: 4800
011: 9600（default）
100: 19200
101: 38400
110: 57600
111: 115200
---------------------------------------
4，3：Serial parity bit
00：8N1（default）
01：8O1
10：8E1
11：8N1（equal to 00）
-----------------------------------
2，1，0，air data rate
000: 0.3k
001: 1.2k
010: 2.4k（default）
011: 4.8k
100: 9.6k
101: 19.2k
110: 38.4k
111: 62.5k
For the two modules that communicate with each
other, the serial port baud rate can be different, and
the verification method can also be different.
When transmitting large packets continuously, users
need to consider the data blocking caused by the same
baud rate, and data may even be lost. It is generally
recommended that both parties have the same baud
rate.
---------------------------------------
Both parties must be the same
The higher the rate, the shorter the distance
04H
Read/Wr
ite
REG1
7，6：Sub packet setting
00: 240 bytes（default）
01: 128 bytes
10: 64 bytes
11: 32 bytes
--------------------------------------
5：RSSI Ambient noise enable
1: Enable
0: Disable（default）
--------------------------------------
4，3，2 Reserve
--------------------------------------
1，0：Transmitting power
00：22dbm（default）
01：17dbm
10：13dbm
11：10dbm
When the data is smaller than the sub packet length,
the serial output of the receiving end is an
uninterrupted continuous output.
When the data is larger than the sub packet length,
the receiving end serial port will output the sub
packet.
--------------------------------------------
When enabled, the C0 C1 C2 C3 command can be
sent in the transmitting mode or WOR transmitting
mode to read the register.
Register 0x00: Current ambient noise rssi
Register 0X01: rssi when the data was received last
time.
（Current channel noise is: dBm =-RSSI/2）
Command format: C0 C1 C2 C3 + starting address +
read length
Returns: C1 + address address + read length + read valid
value
E.g: send C0 C1 C2 C3 00 01
Return C1 00 01 rssi
-----------------------------------------------
Power and current are nonlinear, and power
efficiency is highest at maximum power.
The current does not decrease in proportion to the
decrease in power.

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05H
Read/Wr
ite
REG2
Channel control（CH）
0-64 represents a total of 65 channels
Frequency= 220.125 + CH *0.25M
06H
Read/Wr
ite
REG3
7 Enable RSSI
1：Enable
0：Disable（default）
--------------------------------------
6，Fixed point transmission
1：Fixed point transmission mode
0：Transparent transmission mode
（default）
---------------------------------------
5 Enable reply
1：Enable repeater function
0：Disable repeater function
--------------------------------------
4 LBT enable byte (monitor before
transmission)
1：Enable
0：Disable（default）
--------------------------------------
3 WOR transceiver control
1：WOR transmitter
The module receiving and transmitting
functions are turned on, and a wake-up code is
added when transmitting data. Receiving is turned
on.
0：WOR receiver（default）
The module is unable to transmit data
and works in WOR monitoring mode. The
monitoring period is as follows (WOR cycle),
which can save a lot of power.
---------------------------------------
2，1，0，WOR cycle
000：500ms
001：1000ms
010：1500ms
011：2000ms（default）
100：2500ms
101：3000ms
110：3500ms
111：4000ms
When enabled, the module receives wireless data and
it will follow an RSSI strength byte after output via
the serial port TXD
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The module recognizes the first three bytes of the
serial data as: address high + address low + channel
and takes it as the wireless transmitting target.
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After the reply function is enabled, if the target
address is not the module itself, the module will
forward it once.
In order to prevent data return-back, it is
recommended to use it in conjunction with the fixed
point mode. That is: the target address is different
from the source address.
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When enabled, wireless data will be monitored before
it is transmitted, which can avoid interference to a
certain extent, but may cause data delay.
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Valid for mode 1 only：
1. In the receiving mode of WOR, the module can
modify the delay time after wake-up, and the default
time is 0;
2. The receiving end needs to send the instruction C0
09 02 03 E8 in configuration mode (C0 is the write
command, 09 is the register starter address, 02 is the
length, 03 E8 is the set delay, the maximum FFFF is
65535ms, set to 0 to turn off the wake-up delay. )
3. Data can be sent within the delay
---------------------------------------------
Valid only for mode 1.
Period T = (1 + WOR) * 500ms, maximum 4000ms,
minimum 500ms
The longer the WOR monitoring interval period, the
lower the average power consumption, but the greater
the data delay
Both the transmitter and the receiver must be the
same (very important).
07H
Write
CRYPT_
H
Key high byte (default 0）
Write only, read returns 0
Used for user encryption to avoid intercepting
airborne wireless data by similar modules.
The module will internally use these two bytes as a
calculation factor to transform and encrypt the
over-the-air wireless signal.
08H
Write
CRYPT_
L
Key low byte (default 0)
80H~
86H
Read
only
PID
Product information 7 bytes
Product information 7 bytes