EBYTE E32-DTU Industrial Grade Wireless Transmitter User Manual

EBYTE E32-DTU Industrial Grade Wireless Transmitter

PRODUCT INFORMATION

The E32-DTU (433L37) is a high-speed wireless data transmission station that uses LoRa spread-spectrum technology. It operates in the 410-441MHz band with a default frequency of 433MHz. This transmitter has an RS232/RS485 interface, transparent transmission mode and an operating voltage range of 8V~28V.

Features

• LoRa spread-spectrum technology
• 433MHz default frequency with an operating range of 410-441MHz
• RS232/RS485 interface
• Transparent transmission mode
• Operating voltage range of 8V~28V

Installation

Before installation, ensure that you have the following items:

• E32-DTU user manual
• An antenna for data transmission
• A power supply (pressing mode or power adapter)
• USB to RS-232 or USB to RS-485 cable to connect the computer and data transmission station

Steps to install:

1. Install the antenna to the data transmission station and then connect the power supply. Ensure that the dip switch is in the correct state for your needs.
2. Connect the data transmission station to your computer using USB to RS-232 or USB to RS-485 cable.
3. Start two serial debugging assistants and select the baud rate of the serial port as 9600bps and verification mode as 8N1 to enable serial port transmission.
4. If you need to modify the parameters, switch the data transmission station to the configuration mode and connect it to your computer. Open the E32-DTU data transmission station configuration software to modify the relevant parameters.

Interface Definition

Power Supply Interface:

You can use a DC power adapter for power supply with an external diameter of 5.5mm and an internal diameter of 2.5mm. The VCC terminal and GND terminal in can also be used for power supply, just select either of the power supply modes. E32-dtus can use 8 to 28V DC power supplies. 12V or 24V DC power supplies are recommended.

Pin Name and Function

received
6| DC power port| Power interface| Straight insert round hole, outer diameter 5.5mm, inner
diameter 2.5mm
7| Dip switch| Dip switch| Operating mode control
8| Antenna interface| SMA-K Interface| Impedance 50

Dimension

The unit dimensions of the E32-DTU are shown below:

Note: The information provided in this manual is subject to change with the continuous improvement of the product. Please refer to the latest version of the manual. Chengdu Ebaite Electronic Technology Co., Ltd. reserves the right of final interpretation and modification of all contents in this statement.

This manual is subject to change with the continuous improvement of the product. Please refer to the latest version of the manual. Chengdu Ebaite Electronic Technology Co., Ltd. reserves the right of final interpretation and modification of all contents in this statement

Introduction

Brief introduction

• E32-DTU (433L37) is a high-speed 433M wireless data transmission station (with RS232/RS485 interface), LoRa spread spectrum technology, transparent transmission mode, operating in 410~441MHz band (default 433MHz), operating voltage rangeof8V~28V.
• LoRa direct sequence spread spectrum technology will bring longer communication distance, and has the advantages of concentrated power density, strong anti-interference ability. The module has software FEC forward error correction algorithm, which has high coding efficiency and strong error correction ability. In the case of burst interference, it can actively correct the interfered data packets, greatly improving the reliability and transmission distance. In the absence of FECs, such packets can only be discarded.
• The module has the function of data encryption and compression. The data transmitted by the module in the air has randomness, which makes the data interception meaningless through strict encryption and decryption algorithm. The data compression function has the probability to reduce the transmission time, reduce the probability of interference, improve the reliability and transmission efficiency.

Features

• All core components originally imported, compared with the current similar imported digital transmission radio, the most advanced function, the smallest volume, the best price.
• Using temperature compensation circuit, frequency stability is better than ±1.5PPM.
• All aluminum alloy shell, compact volume, easy installation, good heat dissipation; Perfect shield design, good electromagnetic compatibility, strong anti-interference ability.
• Powerful software function, all parameters can be set through programming: such as power, frequency, air rate, address ID, etc.
• Built-in watchdog, and precise time layout, once abnormal, the module will automatically restart, and can continue to work according to the previous parameter Settings.
• The RF core scheme adopts the original imported SEMTECH SX1278 chip, which has been praised by the industry for its ultra-high stability, and is chosen by the majority of customers.

Operation

You should prepare:

1. Firstly, install the antenna to the data transmission, and then install the power supply, and ensure that the state of the dip switch is correct. The user can choose the pressing mode or the power adapter according to the demand.

2. The use of USB to RS-232, USB to RS-485 or other ways to make the computer and data transmission station connected;

3. Start two serial debugging assistants, select the baud rate of the serial port as 9600bps and the verification modeas 8N1 to realize the serial port transmission through;

4. If the customer needs to modify the parameters, please switch the data transmission station to the configuration mode and connect it
   to the computer. Then open the E32-DTU data transmission station configuration software to modify the relevant parameters.

Installation parameters

Structure

press-line power interface
3| PWR-LED| Power indicator light| Red, lit when the power is on
4| TXD-LED| Sending indicator light| Blinking yellow when data is being sent

5

| ****

RXD-LED

| Receiving indicator

light

| ****

Yellow, blinking when receiving data

6

| ****

DC power port

| ****

Power interface

| Straight insert round hole, outer diameter 5.5mm, inner diameter

2.5mm

7| Dip switch| Dip switch| Operating mode control

8

| ****

Antenna interface

| ****

SMA-K Interface

| Internal hole with external thread, length 10mm, characteristic

impedance 50Ω

Dimension

Interface definition

1. **Power supply Interface

**

  * You can select the ⑥ DC power adapter, which provides power with an external diameter of 5.5mm and an internal diameter of2.5mm.
  * The VCC terminal and GND terminal in ② can also be used for power supply, just select either of the power supply modes. E32-dtus can use 8 to 28V DC power supplies. 12V or 24V DC power supplies are recommended.

2. RS232 interface definition
   The E32-DTU can be connected to the device via RS-232 using a standard DB-9 interface.

3. RS485 Interface definition
   The E32-DTU can connect terminals 485_A and 485_B in step 2 to terminals A and B of RS-485.

Pin

| Standard

definition

|

Function

|

Description

---|---|---|---

1

|

VCC

| Press-line power interface,

positive pole

|

Dc ranges from 8V to 28V. 12V or 24V is recommended

2

|

GND

| Press-line power interface,

negative terminal

| The negative terminal of the power supply is connected

with the system and the housing

3| 485_B| RS-485 port, port B| RS-485 Port B Connects to port B on the device
4| 485_A| RS-485 port, port A| RS-485 Port A Port A connects to port A of the device

Note: Communication failure occurs when the radio station is connected to multiple devices, but does not occur when the radiostation is connected to a single device. Connect terminals 485_A and 485_B in parallel with 120Ω resistance.

Technical indicators

Model specifications

P/N

| Frequency| Power| Distance|

specifications

|

Application

---|---|---|---|---|---
Hz| W| km

E32-DTU (433L37)

|

433

|

5

|

20

| LoRa spread spectrum, long distance

anti-interference, stable

performance

| It is suitable for the environment with small data volume, long transmission distance and easy

interference

Note: Reference distance test environment: clear weather, open environment without shelter, 12V2A power supply, 5dBi gainsuctioncup antenna, antenna height 2 meters from the ground, using the factory default parameters.

General parameters

3

| Working

temperature

|

-40℃～85℃

|

Meet the needs of industrial grade use

4

| Antenna

resistance

|

50 Ω

|

Standard 50 Ω characteristic impedance

5| Voltage range| +8 ~ +28V DC| 12V or 24V is recommended
6| interface| RS232/RS485| Standard DB9 hole /3.81 terminal
7| Baud rate| Default 9600| The baud rate ranges from 1200 to 115200
8| Address code| Default 0| A total of 65536 address codes can be set

Frequency Range and Channels

P/N

| Default frequency| Frequency range| Channel interval|

Channel number

---|---|---|---|---
Hz| Hz| Hz
E32-DTU (433L37)| 433| 410~441| 1| 32，half-duplex

If multiple groups of data transmission stations are used for one-to-one communication in the same area, it is recommendedthat the channel interval of each group of data transmission stations be set at least 2MHz.

Air data rate

P/N

| Default air rate|

Levels

| Air rate level
---|---|---|---
bps| bps
E32-DTU (433L37)| 2.4| 6| 0.3、1.2、2.4、4.8、9.6、19.2

Note: The higher the air speed, the faster the transmission rate, the closer the transmission distance; Therefore, in the case that thespeed meets the requirements of use, the lower the airspeed is recommended.

Current parameters

P/N

| Transmitting current mA| Standby current mA
---|---|---
12V| 24V| 12V| 24V
E32-DTU (433L37)| 1050| 540| 44| 36

Note: It is recommended to retain more than 50% current margin when selecting the power supply, which is conducive tothelong-term stable work of the station.

Transceiving data length and Sub-packing mode

Note:

1. If the data received by the station is larger than the capacity of a single packet, the excess data will be automaticallyallocated to the second transmission until the transmission is completed;
2. The data received by the radio at one time shall not be larger than the cache capacity;

Operating mode

E32-DTU has four operating modes. When there is no harsh and low power demand, it is recommended to configure the station in the general mode (mode 0) for normal communication.The radio is set to general mode (mode 0) by default when it comes out of the factory.

Mode 0

|

General mode

|

On

|

On

| Serial port open, wireless open, transparent

transmission

Mode 1

|

Wake-up mode

|

On

|

Off

| Air wake up transmission mode, packet

with wake up code

Mode 2

|

Power-saving mode

|

Off

|

On

| Air wake up receiving mode to save its own receiving power consumption, this mode

can not be transmitted

Mode 3

|

Sleep mode

|

Off

|

Off

| The module enters hibernation and can

receive parameter setting commands

Note: If there is no need for low power consumption, do not care about wake-up mode (mode 1) and power saving mode (mode2).

Program the DTU

Diagrammatic Drawing

Mode 3

| ****

Sleep mode

| ****

Off

| ****

Off

| The module enters hibernation and

can     receive     parameter    setting commands

1. programming can only be in a specific working mode (see the table above), programming failure, please confirmthe radioworking mode is correct.
2. If you do not need complex programming, open the E32-DTU data transmission station configuration software, you canmodify the relevant parameters.

Parameters setting instruction

1200bps ~ 115200bps.
Parity| Support 8N1: no check. 8E1: parity check; 8O1: odd check; Both are 8 data bits and 1 stop bit.

Air rate

| Wireless communication rate, also known as the air baud rate. The air speed is high, the data

transmission speed is fast, the time delay of transmitting the same data is small, but the transmission distance will be shorter.

Power

| Output power, can be external radiation power. To ensure working efficiency, you are advised to use the maximum power. If the transmitting power is reduced, the communication distance

will be shortened and the required current will be reduced.

FEC

| The equivalent receiving sensitivity can be improved by about 3dBm by means of complex

coding that allows partial correction of lost or disturbed data. Disabling this feature reduces communication latency.

Transmission

way

| Transparent transmission, what happens is what you get. Fixed point: Send data at a fixed point

according to the format.

Wake-up time

| This option is not directly related to communication delay. If customers need low power

applications, adjust this option as required. In power-saving mode, the longer the wake up time, the lower the power consumption of the receiver and the larger the communication delay.

IO driver| The default value is used. The driver mode of the internal TTL signal is selected.

DTU address

| Internal address of wireless data transmission station, unrelated to Modbust address. Radio address the same radio can communicate with each other, can use this feature to achieve

software filtering, grouping. The value ranges from 0 to 65535, in decimal notation.

Frequency channel

| It is equivalent to the working frequency of radio data transmission station. Each channel corresponds to its different working frequency. Theoretically, different frequency channels cannot communicate with each other. If multiple groups of radio data transmission stations exist

in the same area, the communication frequency interval of 2 to 5MHz is recommended.

Connection diagram in the testing and application

Related products

E32-DTU (433L37)

| ****

RS232 RS485

| ****

433M

| ****

37

| ****

20

| LoRa spread spectrum, long

distance interference

E32-DTU (868L30)

| ****

RS232 RS485

| ****

868M

| ****

30

| ****

8

| LoRa spread spectrum, long

distance interference

E32-DTU (915L30)

| ****

RS232 RS485

| ****

915M

| ****

30

| ****

8

| LoRa spread spectrum, long

distance interference

E32-DTU (170L30)

| ****

RS232 RS485

| ****

170M

| ****

30

| ****

8

| Wall-piercing King, LoRa spread

spectrum Anti-jamming

E32-DTU (868L20)

| ****

RS232 RS485

| ****

868M

| ****

20

| ****

3

| LoRa spread spectrum, long

distance interference

E32-DTU (915L20)

| ****

RS232 RS485

| ****

915M

| ****

20

| ****

3

| LoRa spread spectrum, long

distance interference

E32-DTU (433L30)

| ****

RS232 RS485

| ****

433M

| ****

30

| ****

8

| LoRa spread spectrum, long

distance interference

E32-DTU (433L27)

| ****

RS232 RS485

| ****

433M

| ****

27

| ****

5

| LoRa spread spectrum, long

distance interference

E32-DTU (433L20)

| ****

RS232 RS485

| ****

433M

| ****

20

| ****

3

| LoRa spread spectrum, long

distance interference

Practical application

Thedata transmitter of Ebyte is suitable for all kinds of point-to-point, point-to-multipoint wireless data transmission system. For example, smart home, Internet of Things, power load monitoring, distribution network automation, hydrology and hydrological measurement and reporting, tap water network monitoring, city street lamp monitoring, air defense warning control, railway signal monitoring, railway water supply centralized control, oil and gas pipeline network monitoring, GPS Positioning system, remote meter reading, electronic weighing, automatic target reporting, seismic measurement, fire prevention and theft prevention, environmental monitoring and other industrial automation systems, as shown in the figure below:

Pecaution for use

1. Please take good care of the warranty card of the equipment. The warranty card contains the factory number (and important
   technical parameters) of the equipment, which is of important reference value for the user’s future maintenance and newequipment..

2. During the warranty period, if the station is damaged due to the quality of the product rather than man-made damage or natural
   disasters such as lightning strikes, it will enjoy free warranty; Please do not repair by yourself. If there is a problem, contact ourcompany. Ebyte team will provide first-class after-sales service.

3. Do not operate this station in the vicinity of some inflammable places (such as coal mines) or explosive dangerous objects (suchasdetonators).

4. Suitable DC regulated power supply should be selected, which requires strong resistance to high-frequency interference, small ripple and sufficient carrying capacity; It is also best to have over current, over voltage protection and lightning protection functionstoensure the normal work of the data transmission station.

5. Do not use it in an environment beyond the environmental characteristics of the digital transmission station, such as hightemperature, humidity, low temperature, strong electromagnetic field or dusty environment.

6. Do not let the data transmission station continuously at full load, or it may burn out the transmitter.

7. The ground wire of the data transmission station should be well connected with the ground wire of the external equipment (suchasPC, PLC, etc.) and the ground wire of the power supply, otherwise it is easy to burn out the communication interface, etc.; Do not plugor unplug the serial port with power on.

8. When testing the data transmission station, it must be connected to the matching antenna or 50Ω false load, otherwise it is easytodamage the transmitter; If the antenna is connected, it is better to keep the human body more than 2 meters away fromthe antennatoavoid injury. Do not touch the antenna during transmission.

9. Wireless data transmission stations often have different communication distances in different environments, which are oftenaffected by temperature, humidity, obstacle density, obstacle volume and electromagnetic environment; To ensure stablecommunication, you are advised to reserve more than 50% of the communication distance.

10. If the measured communication distance is not ideal, it is suggested to improve the communication distance by analyzingtheantenna quality and antenna installation method. Or contact support@cdebyte.com for help.

11. When selecting the power supply, in addition to the need to retain 50% current margin as recommended, more attention shouldbepaid to its ripple should not exceed 100mV.

Important statement

1. Ebyte reserves the right of final interpretation and modification of all contents in this specification.
2. Due to the continuous improvement of the hardware and software of the product, this manual is subject to change without priornotice. The latest version of the manual shall prevail.
3. Environmental protection, everyone’s responsibility: In order to reduce the use of paper, only the Chinese part of the manual isprinted, the English manual is only available in electronic documents, if necessary, please download from our official website; Inaddition, if you do not require us to order in bulk, we will only provide product specifications according to a certain percentage of theorder quantity. Please kindly understand that not every digital radio station will be equipped with one by one.

Revise history

ABOUT COMPANY

• Sales Hotline： 4000-330-990（Call available 24 hours a day）

• Company Tel： 028-61543675（It can be dialed during working hours）

• Fax： 028-64146160

• Official website ：https://www.es-ebyte.com

• Company address： Building B5, No. 199, West District Avenue, High-tech West District, Chengdu City, Sichuan Province
  ISO9001:2008 ISO14001:2004

• Chengdu Ebyte Electronic Technology Co., Ltd. reserves the right of final interpretation and modificationof allcontents in this  statement.

References

• Fabricantes de módem inalámbrico Lora de China, proveedores de terminales IoT industriales

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>