Ebyte E150-400T30S User manual

E150-400T30S User Manual
400M frequency band 1W LoRa wireless
acquisition control module

Chengdu Ebyte Electronic Technology Co.,Ltd. E150-400T30S user manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd. 1
CHAPTER 1 PRODUCT OVERVIEW.................................................................................................................3
1.1 PRODUCT INTRODUCTION ........................................................................................................................................................................... 3
1.2 FEATURES ..................................................................................................................................................................................................3
1.3 APPLICATION SCENARIOS......................................................................................................................................................................... 4
CHAPTER 2 SPECIFICATIONS.....................................................................................................................5
2.1 LIMIT PARAMETERS ...................................................................................................................................................................................5
2.2 WORKING PARAMETERS ...............................................................................................................................................................................5
CHAPTER 3 MECHANICAL DIMENSIONS AND PIN DEFINITION ..............................................................7
CHAPTER 4 RECOMMENDED WIRING DIAGRAM ........................................................................................... 9
CHAPTER 5 INTRODUCTION TO MODBUS RTU COMMANDS ......................................................................10
5.1 READ COIL STATUS ................................................................................................................................................................................10
5.2 CONTROL COIL STATUS ..........................................................................................................................................................................11
5.3 READ INPUT REGISTER STATUS .............................................................................................................................................................12
5.4 READ HOLD REGISTER ............................................................................................................................................................................12
5.5 OPERATION HOLDING REGISTER.............................................................................................................................................................13
5.6 BROADCAST ADDRESS .............................................................................................................................................................................. 14
5.7 LISTENING ADDRESS .............................................................................................................................................................................. 14
5.8 MODULE RESET........................................................................................................................................................................................15
5.9 AUX DETAILS ......................................................................................................................................................................................... 15
5.9.1 Serial port data output indication...................................................................................................................... 15
5.9.2 Work instructions..............................................................................................................................................................15
5.9.3 Module is in the process of configuration...................................................................................................... 16
5.9.4 Flash write............................................................................................................................................................................16
5.9.5 Complete process of reading IO status of other devices........................................................................17
5.9.6 Lora sends data continuously.................................................................................................................................... 17
5.9.7 Aux precautions...................................................................................................................................................................18
CHAPTER 6 WORKING MODE .......................................................................................................................19
6.1 UART SLEEP WAKE ................................................................................................................................................................................19
6.2 MODE SWITCHING ....................................................................................................................................................................................20
6.3 NORMAL MODE (MODE 0)...................................................................................................................................................................... 20
6.4 WOR MODE (MODE 1)..........................................................................................................................................................................21
6.5 SLEEP MODE (MODE 2)....................................................................................................................................................................... 21

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6.6PIN STATUS ..............................................................................................................................................................................................21
CHAPTER 7 MODBUS ADDRESS TABLE......................................................................................................23
CHAPTER 8 MODULE CONTROL.................................................................................................................. 26
8.1 DIGITAL INPUT (DI)...........................................................................................................................................................................26
8.2 DIGITAL OUTPUT (DO).........................................................................................................................................................................26
8.4 ANALOG OUTPUT (AO)...........................................................................................................................................................................29
8.5 PULSE WIDTH MODULATION (PWM).......................................................................................................................................................30
8.6 RS485 PIN ........................................................................................................................................................................................... 31
8.7 ABOUT FLOATING POINT CONVERSION ....................................................................................................................................................32
8.8 MODULE USE...........................................................................................................................................................................................32
8.9 INTERACTION BETWEEN MODULES ............................................................................................................................................................32
8.10 ABOUT FLASH OPERATION .....................................................................................................................................................................33
CHAPTER 9 INTRODUCTION TO UPPER COMPUTER .................................................................................35
CHAPTER 10 HARDWARE DESIGN.............................................................................................................. 38
CHAPTER 11 COMMON PROBLEMS.............................................................................................................. 39
9.1 THE TRANSMISSION DISTANCE IS NOT IDEAL......................................................................................................................................39
9.2 MODULE IS EASY TO BE DAMAGED ........................................................................................................................................................ 39
9.3 BIT ERROR RATE IS TOO HIGH ............................................................................................................................................................ 39
CHAPTER 12 WELDING OPERATION INSTRUCTIONS .............................................................................. 40
12.1 REFLOW TEMPERATURE ..........................................................................................................................................................................40
12.2 REFLOW SOLDERING CURVE .................................................................................................................................................................. 41
CHAPTER 13 RELEVANT MODELS.............................................................................................................. 42
CHAPTER 14 ANTENNA GUIDE.................................................................................................................. 42
CHAPTER 15 BATCH PACKAGING METHOD ............................................................................................... 43
REVISION HISTORY ................................................................................................................................... 43
ABOUT US .................................................................................................................................................... 44

Chengdu Ebyte Electronic Technology Co.,Ltd. E150-400T30S user manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd. 3
Chapter 1 Product Overview
1.1 Product introduction
E150-400T30S is a wireless serial port module (UART) based on
LoRa radio frequency chip. It works in the frequency band of
410.125~493.125MHz (default 433.125MHz) and adopts LoRa spread
spectrum technology.
The module integrates (switch input) DI, (switch output) DO,
(digital-to-analog converter) ADC, (analog-to-digital converter)
DAC, (pulse width modulation) PWM and (remote radio) LoRa and other functions, users can Send Modbus RTU command
to control through serial port or remote LoRa networking device, and also support low power consumption mode.
The module supports the function of LoRa direct sequence spread spectrum technology, which has the advantages
of longer communication distance, strong anti-interference ability, and strong confidentiality. The module's
factory default air rate is 2.4kbps, and the transmit power is 30dBm. The PA power amplifier and LNA low noise
amplifier are integrated inside, thereby improving communication stability and extending communication distance;
industrial-grade passive crystal oscillator is used to ensure its stability and consistency .
1.2 Features
Support advanced LoRa modulation method, with the advantage of long-distance anti-interference;
Built-in PA+LNA, the communication distance can reach 10km under ideal conditions, and the transmission
distance is better than traditional GFSK;
Support air wake-up (ultra-low power consumption), suitable for battery applications;
The maximum transmit power is 1W, and the software can be adjusted in multiple levels;
Support global license-free ISM 433MHz frequency band, frequency range: 410.125 ~ 493.125MHz, channel
spacing 1MHz;
Support data transmission rate of 2.4k～62.5kbps;
Support 3.3~5.2V power supply, and the best performance can be guaranteed if the power supply is greater
than 5V;
Support standard Modbus RTU protocol;
Support various configuration software/PLC/touch screen;
4-way switch input DI;
4-way switch output DO (DO1, DO2 open-drain output, DO3, DO4 push-pull output);
5-channel 12-bit ADC channel acquisition (2-channel voltage acquisition, 1-channel power supply voltage
acquisition and 2-channel current acquisition);
2-channel 8-bit DAC output, only supports floating-point voltage value output;
2-channel PWM output, frequency range 25 Hz ~ 65535 Hz, multi-level duty cycle adjustable;
Support 1~247 Modbus address settings, 0 is the public address;
Support sending non-local Modbus addresses to other networked LoRa devices;

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Support transparent transmission of non-Modbus commands;
UART to RS485 control pin (external conversion chip is required);
Support 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 and other baud rates;
Support low power consumption mode;
Support direct access of E22 series modules;
Using industrial-grade crystal oscillator, industrial-grade standard design, support long-term use at -40
~ +85 ℃;
IPEX interface, external antenna can be installed.
1.3 Application scenarios
Application of industrial PLC Modbus RTU;
Smart home and industrial sensors, etc.;
Wireless alarm security system;
Building automation solutions;
Wireless industrial grade remote control;

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Chapter 2 Specifications
2.1 Limit parameters
The main parameters
性能
Notes
Min
Max
voltage
0 V
5.5 V
Exceeding 5.5V may permanently burn the module
blocking power
-
10 dBm
The probability of burning at close range is
small
Operating temperature
-40 ℃
+85 ℃
Industrial grade
ADC maximum input voltage
0 V
6 V
ADC1、ADC2、ADC3
ADC maximum input circuit
0 mA
25 mA
ADC4、ADC5
ADC minimum operating
voltage
3.0 V
-
Below this supply voltage, the ADC works
abnormally
DAC minimum operating
voltage
3.3 V
Below this supply voltage, the DAC works
abnormally
RF Minimum Operating
Voltage
2.65 V
-
Below this supply voltage, the RF section stops
working
2.2 Working parameters
main parameters
performance
Notes
MIin
Typical
value
Max
Operating Voltage（V）
3.3
5.0
5.5
≥5.0V Guaranteed output power (RF)
communication level（V）
3.3
Risk of burnout with 5V TTL
Operating temperature（℃）
-40
-
+85
Industrial grade design
Working frequency（MHz）
410.125
-
493.125
Supports ISM bands
功
耗
Emission current（mA）
-
750
900
Instantaneous power consumption
Working current（mA）
13
15
17
sleep current（μA）
6
software shutdown
Maximum transmit power
（dBm）
28
30
31
User can configure
Receive sensitivity（dBm）
-145
-147
-148
The air rate is 2.4kbps
air speed（bps）
2.4k
2.4k
62.5k
User can configure
ADC voltage range（V）
0
-
5
Exceeding this range may cause damage to the ADC
ADC current range（mA）
0
-
20
Exceeding this range may cause damage to the ADC
DAC pin drive capability
（mA）
-
Weak, an external voltage follower may be
required according to user needs
DO1/DO2 drive capability
-
Open-drain output, drive capability depends on

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（mA）
external pull-up resistor
DO3/DO4Drive capability
（mA）
-35
12
Push-pull output
Input voltageDI（V）
0
3.3
Exceeding this voltage may cause damage to the
DI
Main parameters
Description
Notes
Distance
10km
Clear and open environment, antenna gain 5dBi, antenna height 2.5
meters, air rate 2.4kbps
(This parameter is measured in the open area of Chengdu urban
area)
ADC accuracy
12 bits
Built-in external reference voltage and voltage follower, the
power supply voltage needs to be ≥3.0V, and the accuracy is 1%
DAC accuracy
8 bits
Floating point value, the power supply voltage needs to be ≥3.3V,
the accuracy is 1%
PWM precision
Frequency
step: 1 Hz Duty
cycle step: 1%
Frequency range: 25Hz~65535Hz, accuracy 1%
Duty cycle range: 0~100%, accuracy 1%
Subcontracting
240 Btye
The maximum capacity of a single package, after it is exceeded,
it will be automatically divided into packages
Cache capacity
1024 Btye
Modulation
LoRa
Communication Interface
UART serial
port
3.3V TTL level
Packaging method
SMD
interface
UART
The user can connect an RS485 adapter chip, and the control pin
has been led out
Dimensions
40.5*25.0
Tolerance ±0.1mm (excluding pin header height)
Antenna interface
IPEX
Characteristic impedance about 50 ohms

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Chapter 3 Mechanical Dimensions and Pin Definition
Pin
number
Pin name
Pin direction
pin usage
1
VCC
Input
Module power positive reference, voltage range: 3.3 ~ 5.5V DC
2
GND
Input
Module power ground
3
SWCLK
Input
SWD debug pin
4
NRST
Input
Reset module pin, it needs to be pulled low for at least 10 ms and then
released to perform external reset
5
SWDIO
Input
SWD debug pin
6
485_EN
Output
When connecting an external UART to RS485 chip, this pin is used as the
control terminal
7
AUX
Output
Used to indicate the working status of the module, or to wake up an
external MCU

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8
RXD
Input
TTL serial input, connect to external TXD output pin, pull-up input
9
TXD
Output
TTL serial output, connect to external RXD input pin
10
GND
Input
Module power ground
11
ANT
output/output
RF signal output/output terminal, IPEX interface, for connecting the
antenna
12
GND
Input
Module power ground
13
GND
Input
Module power ground
14
GND
Input
Module power ground
15
GND
Input
Module power ground
16
PWM1
output
PWM Output
17
PWM2
output
PWM Output
18
GND
Input
Module power ground
19
DAC1
output
DAC output pin
20
DAC2
output
DAC output pin
21
ADC1
Input
ADC input pin for voltage measurement (0~5V)
22
ADC2
Input
ADC input pin for voltage measurement (0~5V)
23
ADC4
Input
ADC input pin for current measurement (0~20mA)
24
ADC5
Input
ADC input pin for current measurement (0~20mA)
25
DI1
Input (very weak
pull-up)
Digital input, IO status can be inquired through Modbus commands
26
DI2
Input (very weak
pull-up)
Digital input, IO status can be inquired through Modbus commands
27
DI3
Input (very weak
pull-up)
Digital input, IO status can be inquired through Modbus commands
28
DI4
Input (very weak
pull-up)t
Digital input, IO status can be inquired through Modbus commands
29
DO1
output (open
drain)
Open-drain output, pull-up resistor must be added externally, otherwise
it cannot output high level
30
DO2
output (open
drain)
Open-drain output, pull-up resistor must be added externally, otherwise
it cannot output high level
31
DO3
output
(push-pull)
Push-pull output
32
DO4
output
(push-pull)
Push-pull output

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Chapter 4 Recommended Wiring Diagram
NUM.
A brief description of the connection between the module and the microcontroller (the above picture
takes the STM8L microcontroller as an example)
1
The wireless serial port module is TTL level, please connect with 3.3V TTL level MCU.
2
When using a 5V microcontroller, please perform UART level conversion.
3
TVS protection and capacitors need to be added outside the power supply (it is recommended to add
a 22uF low ESR electrolytic capacitor or tantalum capacitor)
4
The RF module is sensitive to pulsed static electricity. Do not hot-swap the module.
5
It is recommended to use a power supply above 10W (5V 2A) for power supply
6
DO1 and DO2 must be pulled up externally (open-drain output), otherwise they cannot output high
level

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Chapter 5 Introduction to Modbus RTU Commands
Modbus RTU has a total of 8 function codes (hexadecimal), and their meanings are as follows:
function code
illustratation
function code
illustration
01
Read coil status
05
write coil status
02
Read discrete input
06
write a single register
03
read holding register
0F
write multiple coils
04
read input register
10
write multiple registers
E150-400T30S modules can communicate with E22-400Txxx series modules wirelessly, but the following
conditions must be met:
Both modules need to work in "transparent mode";
The parameters of "air rate", "channel address", "module address" and "network number" of both modules
must be consistent;
The following commands related to remote wireless communication must meet the above conditions.
5.1 Read coil status
Using the read coil status (01) function code to read the output coil status, for example: read the status of
do1 ~ do4
01
01
00 00
00 04
3D C9
Device MODBUS
address
Function code
Register
head address
Number of output
coils read
CRC check
code
CRC check code note: the CRC check code of the last two bytes of the sending instruction needs to be calculated
by the user.
Serial port sending: 01 01 00 00 04 3D C9
Remote wireless transmission: 01 01 00 00 00 04 3D C9
After the above command is sent to the device through the serial port or wireless, the device will return the
following values to the serial port or wireless:
01
01
01
0F
11 8C
Device MODBUS
address
Function code
Number of
bytes of data
Returned status
data
CRC check
code
The returned status data 0f indicates that the outputs do1 to do4 are at a high level.
Serial port receiving return value: 01 01 01 0f 11 8C

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Remote wireless reception return value: 01 01 01 0f 11 8C
5.2 Control coil status
Support the operation of single coil (05) and multiple coils (0f) function codes.
use 05 command to write a single coil, for example: do1 outputs high level
01
05
00 00
FF 00
8C 3A
Device MODBUS
address
Function
code
Register
head
address
Conduction: FF 00
Close: 00 00
CRC check
code
Note: the CRC check code of the last two bytes of the sending instruction needs to be calculated by
the user.
Serial port sending: 01 05 00 00 FF 00 8C 3A
Remote wireless transmission: 01 05 00 00 FF 00 8C 3A
After sending the above command to the device via serial port or wireless, the device will return the
following values to the serial port or wireless:
01
05
00 00
FF 00
8C 3A
Device MODBUS
address
Function
code
Register
head address
Operation mode
CRC check
code
Phenomenon: DO1 output high level。
Serial port receiving return value: 01 05 00 00 FF 00 8C 3A
Remote wireless reception return value: 01 01 01 0f 11 8C
use the 0f function code to write commands for multiple coils, for example: do1 ~ do4 output high level
01
0F
00 00
00 04
01
0F
7E 92
Device MODBUS
address
Functio
n code
Starting
address:
Number of
coils
Data bytes
Number of
control coils
Data (bit
operation)
CRC check
code
Note: the CRC check code of the last two bytes of the sending instruction needs to be calculated by the user.
Serial port sending: 01 0f 00 00 04 01 0f 7e 92
Remote wireless transmission: 01 0f 00 00 00 04 01 0f 7e 92
After sending the above command to the device via serial port or wireless, the device will return the following
values to the serial port or wireless:
01
0F
00 00
00 04
C8 3F

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Device MODBUS
address
Function
code
Register
head
address
Number of registers
read
CRC check
code
Phenomenon: do1 ~ D04 output high level.
Serial port receiving return value: 01 0f 00 00 00 04 C8 3F
Remote wireless reception return value: 01 0f 00 00 00 04 C8 3F
5.3 Read input register status
use the 04 function code to read one or more input register values, for example: read the current
floating-point voltage value (power supply voltage) of adc3
01
04
00 CC
00 02
B1 F4
Device MODBUS
address
Functio
n code
Register
head address
Number of
registers read
CRC check
code
Note: the CRC check code of the last two bytes of the sending instruction needs to be calculated by
the user.
Serial port sending: 01 04 00 CC 00 02 B1 F4
Remote wireless transmission: 01 04 00 CC 00 02 B1 F4
After sending the above command to the device via serial port or wireless, the device will return the
following values to the serial port or wireless:
01
04
04
40 85 E5 5E
35 00
Device MODBUS
address
Function code
Number of
bytes of data
Returned data
CRC check
code
Phenomenon: the value of the return power supply voltage is 4.18425v (floating-point type 4085 e55e).
Serial port receive return value: 01 04 04 40 85 E5 5E 35 00
Remote wireless reception return value: 01 04 04 40 85 E5 5E 35 00
5.4 Read hold register
use 03 function code to read one or more register values, for example: read the current baud
rate
01
03
0B 72
00 01
26 35
Device MODBUS
address
Function code
Register
head address
Number of
registers read
CRC check code

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Note: the CRC check code of the last two bytes of the sending instruction needs to be calculated by
the user.
Serial port sending: 01 03 0b 72 00 01 26 35
Remote wireless transmission: 01 03 0b 72 00 01 26 35
After sending the above command to the device via serial port or wireless, the device will return the
following values to the serial port or wireless:
01
03
02
00 03
F8 45
Device MODBUS
address
Function
code
Number of
bytes of data
Returned data
CRC check
code
Phenomenon: return the baud rate value, 03 represents the baud rate of 9600 bps.
Serial port receiving return value: 01 03 02 00 03 F8 45
Remote wireless reception return value: 01 03 02 00 03 F8 45
5.5 Operation holding register
It supports the function code operation of operating a single register (06) and operating multiple
registers (10).
Using 06 function code to write a single holding register, for example: set to change the working
mode of the equipment
01
06
07 E8
00 00
F8 8A
Device MODBUS
address
Function
code
Register
address
Write
value
CRC check
code
Note: the CRC check code of the last two bytes of the sending instruction needs to be calculated by
the user.
Serial port sending: 01 06 07 E8 00 00 F8 8A
Remote wireless transmission: 01 06 07 E8 00 00 F8 8A
After sending the above command to the device via serial port or wireless, the device will return the
following values to the serial port or wireless:
01
06
07 E8
00 00
F8 8A
Device MODBUS
address
Function
code
Register
address
Write value
CRC check
code
Phenomenon: switch the working mode of the module to the normal mode.
Serial port receiving return value: 01 06 07 E8 00 00 F8 8A
Remote wireless reception return value: 01 06 07 E8 00 00 F8 8A
command to write multiple holding registers using 10 function code, for example: set the output

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voltage value of dac1 to 1.2V.
01
10
00 00
00 02
04
3F 99 99 9A
C5 AF
Device MODBUS
address
Function
code
Register
head
address
Number
of
registe
rs
Number of
bytes
written
Data written
CRC check
code
Note: the CRC check code of the last two bytes of the sending instruction needs to be calculated by
the user.
Serial port sending: 01 10 00 00 00 02 04 3F 99 99 9A C5 AF
Remote wireless transmission: 01 06 07 E8 00 00 F8 8A
After sending the above command to the device via serial port or wireless, the device will return the
following values to the serial port or wireless:
01
10
00 00
00 02
41 C8
Device MODBUS
address
Function
code
Register address
Number of registers
CRC check
code
Phenomenon: The DAC1 pin of the module outputs a voltage of 1.2V.
Serial port receiving return value: 01 10 00 00 00 02 41 C8
Remote wireless reception return value: 01 10 00 00 00 02 41 C8
5.6 Broadcast address
When the module receives commands in non MODBUS format, it will send the received data as transparent
data.
For example: set the address of module a to 0xFFFF and the channel to 0x04.
When module a is used as the transmitter (the same mode, transparent transmission mode), all
receiving modules under 0x04 channel can receive data to achieve the purpose of broadcasting.
5.7 Listening address
For example: set the address of module a to 0xFFFF and the channel to 0x04.
When module a is used as the receiver, it can receive all the data under channel 0x04 to achieve
the purpose of monitoring.

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5.8 Module reset
Reset using the hardware NRST pin. The built-in MCU needs to be pulled down for at least 10 ms before
being released to reset the MCU.
Using MODBUS command to reset (01 06 07 EA 5B B5 53 CD), that is, write 0x5bb5 to register 07ea
h to enter watchdog reset, and the module will restart after a period of time.
5.9 Aux details
Aux will be pulled down in the following cases:
Power on and enter the initialization process
Data received through serial port
Serial port is sending data
RF is sending data
Saving data to flash
5.9.1 Serial port data output indication
When UART needs to send data, aux will be pulled down about 5ms in advance to wake up the external
MCU in sleep.
When the module receives the RF signal, it will delay about 10ms to wait for the sending module
to be ready, and then reply through Lora or UART.
When data is received at RF and needs to be output through UART, a delay of 15ms will pass.
5.9.2 Work instructions
when UART receives the non local MODBUS command or the first byte of the non MODBUS command, aux
will be pulled down until RF transmission is completed.

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when UART receives the first byte of the local MODBUS command, aux will be pulled down until
the processing is completed.
5.9.3 Module is in the process of configuration
When resetting and switching modes, the aux pull-down time generated by resetting is generally
about 11ms.
5.9.4 Flash write
Many instructions will save parameters to flash when writing, so aux is required to indicate,
so as to prevent the customer from sending data when writing in flash, resulting in write failure
or failure to receive data normally. The write in flash operation is usually after the UART data

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is sent.
5.9.5 Complete process of reading IO status of other devices
As shown in the figure, the time Lora sends the preamble can be modified according to the preamble
register, and the preamble will not be added by default.
If the customer needs to access the module in wor mode, the preamble register must be configured,
and the length of the preamble must be greater than or equal to the wor cycle.
5.9.6 Lora sends data continuously
When customers need to send long data continuously, they can choose to directly pour more than
240 bytes of data into the serial port. The module will automatically subcontract the data when
processing the data. The sequence of aux is shown in the following figure:

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5.9.7 Aux precautions
In the process of aux being pulled down, it is not recommended to operate the module, which
may lead to some unknown problems;
Aux is generally used as an indicator or as a judgment indicator of the working state;
The aux timing in debug mode may be different. Please take the non debug mode as the standard.

Chengdu Ebyte Electronic Technology Co.,Ltd. E150-400T30S user manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd. 19
Chapter 6 working mode
The module has three working modes, which are controlled and set by the device mode register; Details
are shown in the table below:
Mode (0-2)
Mode introduction
Remark
Instruction (take
address 01 as an
example)
0 normal mode
1. The serial port is turned on, the
wireless port is turned on, and all kinds
of peripherals are turned on
2. If the receiver is operating in mode 1,
the preamble register needs to be
configured to use Lora for remote access
Receiver works in
mode 0 and 1
01 06 07 EB 00 00 F8 8A
(1) Wor mode
1. According to the wor cycle register,
periodically wake up the MCU to enter the
receiving mode
2. Wor mode cannot actively transmit RF, but
can passively reply RF data
3. The serial port must be awakened
according to the sequence to work
Receiver works in
mode 0 and 1
01 06 07 EB 00 01 39 4A
(2) sleep
mode
1. The serial port must be awakened
according to the sequence to work
2. All peripherals sleep
3. All IO states are forced to change,
please refer to the pin state of sleep mode
All peripherals go
to sleep
01 06 07 EB 00 02 79 4B
6.1 UART sleep wake
when working in wor mode or sleep mode, you need to wake up the module according to a specific
timing. You can use any baud rate before entering sleep. If the baud rate is less than 9600,
it is recommended to directly use the command of switching mode to wake up. The wake-up process
is as follows:
Wake up process: (the module is already working in wor mode or sleep mode, taking address 01 as an
example)
① Send MODBUS command (command to switch mode to normal mode: 01 06 07 EB 00 00 F8 8a);
② After a delay of 50ms, send this command again to complete the mode switching. (Note 1)
matters needing attention:
1. If the baud rate of the customer is 1200 BPs, a delay of 100ms is required, and the delay of 50ms
is uniformly adopted for other baud rates;
2. After the client wakes up by sending the first packet of data, the module will remain awake for
about 500ms, and the client needs to complete the sending of serial port data within this time interval;