Ebyte E32-DTU-V8 User manual

Chengdu Ebyte Electronic Technology Co.Ltd. E32-DTU(433L33)-V8 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co., Ltd. 1
E32-DTU(433L33)-V8

Chengdu Ebyte Electronic Technology Co., Ltd. E32-DTU(433L33)-V8 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co., Ltd. 2
CONTENTS
1. Introduction ................................................................................................................................................................ 3
1.1 Brief introduction............................................................................................................................................. 3
1.2 Features .............................................................................................................................................................3
2 Quick start....................................................................................................................................................................3
3 Dimensions .................................................................................................................................................................. 6
3.1 Parts description............................................................................................................................................... 6
3.2 Dimensions.......................................................................................................................................................6
4 Interface definition...................................................................................................................................................... 8
4.1 Power interface.................................................................................................................................................8
4.2 RS232............................................................................................................................................................... 8
4.3 RS485............................................................................................................................................................... 8
5 Technical specification................................................................................................................................................ 9
5.1 Model specification .......................................................................................................................................... 9
5.2 General specification parameter.......................................................................................................................9
5.3 Frequency and channel numbers......................................................................................................................9
5.4 Transmitting power.........................................................................................................................................10
5.5 Air data rate .................................................................................................................................................... 10
5.6 Current ............................................................................................................................................................10
5.7 TX and RX FIFO and sub-packing method...................................................................................................10
6 Operating mode......................................................................................................................................................... 10
7 Programming the modem .......................................................................................................................................... 12
7.1 Connection diagram ....................................................................................................................................... 12
7.2 Software for parameter setting .......................................................................................................................13
9 Related series products..............................................................................................................................................14
10 Application field ...................................................................................................................................................... 14
11 Application notes ..................................................................................................................................................... 15
About us ........................................................................................................................................................................16

Chengdu Ebyte Electronic Technology Co.Ltd. E32-DTU(433L33)-V8 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co., Ltd. 3
1. Introduction
1.1 Brief introduction
E32-DTU(433L33)-V8 is a wireless modem that adopts military-grade LoRa modulation technology. Due to its
advanced modulation method, the communication distance and stability are greatly improved. On the basis of the original
built-in power amplifier (PA) and low noise amplifier (LNA), the maximum transmit power reaches 2W and the
receiving sensitivity is also improved to a certain extent. Noise amplifier products have been greatly improved. The
difference is analog FM radio plus MODEM analog modem, which provides transparent RS232/RS485 interface,
working in 433MHz with communication distance up to 12km.
As a communication medium, it has a certain scope of application such as optical fiber, microwave and open wire: it
provides real-time and reliable data transmission of monitoring signals in private networks under certain special
conditions, with low cost, installation and maintenance. It features convenience, strong diffraction ability, flexible
network structure, and long coverage. It is suitable for occasions such as many and scattered points and complex
geographical environment. It can be connected with PLC, RTU, rain gauge, liquid level gauge and other data terminals.
1.2 Features
★Adopts military-grade LoRa modulation technology, greatly improves the communication distance and stability;
★Simple and high-efficiency power supply design, power adapter or screwing method available, 8~28V power supply;
★The transmit power is up to 2W, adjustable in multiple levels, and all technical indicators meet European industrial
standards;
★Adopts temperature compensation circuit, the frequency stability is better than ±1.5PPM;
★Working temperature range: -40℃～+85℃, suitable for various harsh working environments, real industrial grade
products;
★All aluminum alloy shell, compact size, easy installation, good heat dissipation; perfect shielding design, good
electromagnetic compatibility, strong anti-interference ability;
★Multiple protection functions such as power reverse connection protection, over-connection protection, antenna
surge protection, etc., greatly increase the reliability;
★Powerful software functions, all parameters can be set by programming: such as power, frequency, air rate, address
ID, etc.;
★Built-in watchdog with precise time layout. Once an exception occurs, the module will automatically restart and
continue to work according to the previous parameters.
2 Quick start
You will prepare items below

Chengdu Ebyte Electronic Technology Co., Ltd. E32-DTU(433L33)-V8 User Manual
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1. First install the antenna for the data transmission, then install the power supply, and ensure that the DIP switch is in the
correct state. The user can choose the screwing method or the power adapter to supply power according to their needs;
2 Use USB to RS-232, USB to RS-485 or other methods to connect computer with modem；
3 Start two serial port debugging assistants, select the serial port baud rate as 9600bps and the verification method as 8N1,
then the serial port transparent transmission can be realized;

Chengdu Ebyte Electronic Technology Co., Ltd. E32-DTU(433L33)-V8 User Manual
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4 If the customer needs to modify the parameters, please set dip switch in the configuration mode and connect it to the
computer. Open the E90-DTU configuration software to modify the relevant parameters. After the configuration is
completed, the dip switch state must be restored before communication can be carried out.
Mode 0 Factory default mode Mode 3 Parameter configuration

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3Dimensions
3.1 Parts description
Pin
Name
Function
Remarks
1
DB-9 female socket
RS232
Standard RS232 interface
2
3.81 Terminals
RS485, power
supply
Standard RS485 interface and screwing power
interface
3
PWR-LED
Power Indicator
Red, lights up when the power is on
4
TXD-LED
TX indicator
Yellow, flashes when sending data
5
RXD-LED
RX indicator
Yellow, blinks when receiving data
6
DC power interface
Power interface
DIP round hole, outer diameter 5.5mm, inner
diameter 2.5mm
7
DIP switch
DIP switch
Work mode control
8
Antenna interface
SMA-K
External thread inner hole, length 10mm,
characteristic impedance 50Ω
3.2 Dimensions

Chengdu Ebyte Electronic Technology Co., Ltd. E32-DTU(433L33)-V8 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co., Ltd. 7
单位：mm

Chengdu Ebyte Electronic Technology Co., Ltd. E32-DTU(433L33)-V8 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co., Ltd. 8
4Interface definition
4.1 Power interface
Users can choose ⑥DC power interface,using the power adapter supply with the interface of the 5.5mm outer
diameter , 2.5mm diameter ;
Also users can choose the VCC and GND terminal power supply from ②, both are optional；
8 ~ 28V DC power supply, it is recommended to use 12V or 24V DC power supply for E32-DTU.
4.2 RS232
The E32-DTU can be connected to the device via RS-232 using the standard DB-9 interface.
4.3 RS485
E32-DTU can be connected to the 485_A terminal and 485_B terminal from ②with the RS-485 A terminal
and B terminal of other device respectively.
Pin NO.
Definition
Function
Description
1
VCC
Crimping power interface,
positive
8 ~ 28V DC, recommended 12V or 24V
2
GND
Crimping power interface,
negative
The power supply negative pole is connected to
the system ground and the housing

Chengdu Ebyte Electronic Technology Co., Ltd. E32-DTU(433L33)-V8 User Manual
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3
485_B
RS-485 interface, interface B
The RS-485 interface B is connected to the
device interface B
4
485_A
RS-485 interface, interface A
The RS-485 interface A is connected to the
device interface A
Note: The transceiver will be in poor communication when connected to multiple devices , it is recommended to be
connected to a single device, please try to use parallel 120Ω resistor between 485_A terminal and 485_B.
5Technical specification
5.1 Model specification
Model No.
Frequency
TX power
Distance
Features
Recommended application
Hz
W
km
E32-DTU(433L33
)-V8
433M
2
12
LoRa，
anti-interference
Suitable for small data and long-distance
application environment
Note: Test condition: in clear and open air without shelters, 12V /2A power supply, 5dBi gain sucker antenna over 2
meters height from the ground, with the factory default parameters.
5.2 General specification parameter
No.
Item
Value
Note
1
Size
82*62*25mm
See more in 3.2. Dimensions
2
Weight
150g
Difference is within 5g
3
Temperature
-40℃～+85℃
Meet industrial request
4
Antenna
impedance
50Ω
Standard 50 Ω characteristic impedance
5
Supply voltage
8～28V DC
It is recommended to use 12V or 24V
6
Communicatio
n interface
RS232/RS485
Standard DB9 hole / 3.81 terminal block
7
Baud rate
Factory default 9600
From 1200~115200
8
Address code
Factory default 0
65536 configurable address
5.3 Frequency and channel numbers
Model No.
Default Frequency
Frequency Range
Channel
Interval
Channel numbers
Hz
Hz
Hz

Chengdu Ebyte Electronic Technology Co., Ltd. E32-DTU(433L33)-V8 User Manual
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E32-DTU(433L33
)-V8
433M
410～441M
1M
32，half duplex
★Note: In the same area when multiple data transceivers are communicating one to one at the same time , it is
recommended to set the channel spacing between each group of data transceivers at 2MHz or more.
5.4 Transmitting power
Model No.
2W
1W
500mW
250mW
E32-DTU(433L33)-V8
Factory default
√
√
√
★Note: The lower the transmit power, the closer the transmission distance, but the working current won’t be
declined in exact proportion , it is recommended to use the maximum transmit power.
5.5 Air data rate
Model
Default
Levels
Air data rate (bps)
bps
bps
E32-DTU(433L33)-V8
2.4k
4
2.4k、4.8k、9.6k、19.2k
★Note: The higher the air data rate, the faster the transmission rate, the transmission distance is also closer; when
the rate meets the requirements , the lower air data rate, the better quality.
5.6 Current
Model
TX current mA
Standby current mA
12V
28V
12V
28V
E32-DTU(433L33)-V8
502
260
10
8
★Note: It is recommended to retain more than 50% of the current margin when selecting the power supply,
which will help the data transceiver to work steadily for a long time.
5.7 TX and RX FIFO and sub-packing method
Model No.
Buffer
Sub-packing method
E32-DTU(433L33)-V8
512 byte
Automatically send 58 bytes per packet
★Note: 1. If the data received by the radio station at a time is larger than the capacity of a single packet, the excess data
will be automatically allocated to the second transmission until the transmission is completed;
2. The data received by the radio at a time cannot be larger than the buffer capacity;
6 Operating mode
There are four operating modes, if low power consumption is not required, for normal communication it is