Ebyte E95-dtu 400sl30p-232 Wireless Modem User Manual

EBYTE E95-DTU 400SL30P-232 Wireless Modem

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Brief Introduction

E95-DTU (400SL30P-232) is a wireless data transmission radio station that adopts military-grade LoRa modulation technology. It has a variety of transmission methods. It works in the frequency band (410.125MHz～ 493.125MHz) (default 433.125MHz). The radio provides a transparent RS232interface. Adopt plastic shell, guide rail type installation structure, support DC 8～28V voltage input. LoRa spread spectrum technology will bring longer communication distance, and has the advantage of strong anti-interference ability. As a communication medium, wireless data transmission station has a certain scope of application like 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 Convenience, strong diffraction ability, flexible network structure, and long coverage. It is suitable for many and scattered locations and complex geographic environments. It can be connected with PLC, RTU, rain gauge, level gauge and other data terminals.
Features

• The latest LoRa technology is adopted, which is farther than traditional LoRa digital radio stations and has more powerful performance;
• With data encryption, the packet length can be set;
• Adopt flame-retardant plastic shell and guide rail type installation structure, which is convenient and efficient to install
• Hidden buttons are used to switch working modes to avoid false triggers, and the equipment is more reliable in operation;
• Simple high-efficiency power supply design, support power supply configuration or line pressure mode, support DC 8～28V power supply;
• The transmit power is up to30dBm, and supports multi-level adjustment, and all technical indicators meet industrial standards;
• Support Modbus protocol transmission;
• Support LBT function, the radio station automatically waits for transmission according to the current environmental noise intensity. Greatly improve the communication success rate of the radio station in harsh environments;
• Support wireless sending of command data packets, remote configuration or reading radio station parameters;
• Support communication key function, effectively prevent data from being intercepted;
• Multi-level relay networking can be realized, effectively extending the communication distance, and realizing ultra-long-distance communication;
• Using temperature compensation circuit, the frequency stability is better than ±1.5PPM;
• Operating temperature range: -40℃～ +85℃, adapt to various harsh working environments, real industrial grade products;
• Multiple protection functions such as power reverse connection protection, over-connection protection, antenna surge protection, etc., greatly increase the reliability of the radio;
• The communication port and power interface adopt isolation and high protection;
• Powerful software function, all parameters can be set by programming: such as power, frequency, air speed, address ID, etc.;
• Built-in watchdog, and accurate time layout, once an abnormality occurs, the radio will automatically restart, and can continue to work according to the previous parameter settings.

Quick Start

You need to prepare two E95-DTU (400SL30P-232)

First install the antenna for the digital radio, and then install the power supply. The user selects the power adapter for power supply according to the needs.

Use USB to RS232 or other methods to connect the computer to the digital radio;

Start two serial port debugging assistants, select the serial port baud rate to be 9600bps (default), and the check method to be 8N1 to realize serial port transparent transmission;

If the customer needs to switch the working mode, it can be controlled by the Mode button to switch between different working modes (M0 indicator, M1 indicator). Long press the Mode button for about 1ms and then release it to switch the mode once. The mode switching details are shown in the table below:\

Note: The radio has a power-down save mode function (the factory default setting is transparent transmission mode), and the user needs to switch the corresponding mode according to the M1 and M0 indicators (effective immediately).

Installation Dimensions

Technical Index

General Specifications

Frequency Range and Number of Channels

Note: If multiple groups of digital radios are used in the same area to communicate one to one at the same time, it is recommended that each group of digital radios set a channel spacing of more than 2MHz.

Transmit Power Level

Note: The lower the transmission power, the closer the transmission distance, but the working current will not decrease in the same proportion. It is recommended to use the maximum transmission power.
AirSpeed Class

Note: The higher the air speed setting, the faster the transmission rate and the shorter the transmission distance; therefore, when the speed meets the requirements of use, it is recommended that the airspeed be as low as possible.

Sending and Receiving Length and Subcontracting Method

Note:

1. If the radio’s single received data is greater than the single packet capacity, the excess data will be automatically allocated to the second transmission until the transmission is completed;
2. The single received data of the radio station cannot be larger than the buffer capacity.

Detailed Function

Fixed-point Transmission (Hexadecimal)
Broadcast Transmission (Hexadecimal)

Broadcast Address

• Example: Set the address of station A to 0xFFFF and the channel to 0x04.
• When station A is used as a transmitter (same mode, transparent transmission mode), all receiving stations under the 0x04 channel can receive data to achieve the purpose of broadcasting.

Listening Address

• Example: Set the address of station A to 0xFFFF and the channel to 0x04.
• When the station A is receiving, it can receive all the data under the 0x04 channel to achieve the purpose of monitoring.

Product selection

E95-DTU has four working modes. When there is no demanding low power consumption, it is recommended to configure the radio to transparent transmission mode (mode 0) if normal communication is required. The default setting of the radio at the factory is transparent transmission mode (mode 0).

Transparent Transmission Mode (Mode 0)

WOR Mode (Mode 1)

Configuration Mode (Mode 2)

Deep Sleep Mode (Mode 3)

Register Read and Write Control

Instruction Format
In configuration mode (mode 2: M1 indicator light is on, M0 indicator light is off), the supported command list is as follows (when setting, only 9600, 8N1 format is supported):

Register Description

Factory Default Parameters

Relay Networking Mode Use

1. Forwarding rules, the relay can forward data in both directions between two NETIDs.
2. In the relay mode, ADDH\ADDL is no longer used as a radio address, but as a NETID forwarding pairing. As shown in the figure:
   ① First level relay
   “Node 1” NETID is 08.
   “Node 2” NETID is 33.
   The ADDH\ADDL of relay 1 are 08 and 33 respectively.
   So the signal sent by node 1 (08) can be forwarded to node 2 (33)
   At the same time, node 1 and node 2 have the same address, so the data sent by node 1 can be received by node 2.
   ② Secondary relay
   The ADDH\ADDL of relay 2 are 33 and 05 respectively.
   So relay 2 can forward the data of relay 1 to the network NETID: 05.
   Therefore, node 3 and node 4 can receive node 1 data. Node 4 normally outputs data, and node 3 has a different address from node 1, so no data is output.
   ③ Two-way relay
   As shown in the configuration: the data sent by node 1 can be received by nodes 2 and 4, and the data sent by nodes 2 and 4 can also be received by node

Relay Networking Mode Use

• The following figure shows the display interface of the E95-DTU (400SL30P-232) configuration host computer. The user can switch to the configuration mode through the MODE button, and quickly configure and read the parameters on the host computer.
• In the configuration of the host computer, the radio address, frequency channel, network ID, and key are all displayed in decimal mode. The range of each parameter is:
  Network address: 0～65535
  Frequency channel: 0～83
  Network ID: 0～255
  Key: 0～65535
• When using the host computer to configure the relay mode, the user needs to pay special attention. Since the parameters in the host computer are in decimal display mode, the radio address and network ID need to be converted when filling in the radio station address and network ID. If the network ID input by the transmitting terminal A is 02 and the network ID input by the receiving terminal B is 10, when the relay terminal R sets the radio address, the hexadecimal value 0X020A is converted to the decimal value 522 as the relay terminal R. Radio address. That is, the radio address value that needs to be filled in by the relay terminal R at this time is 522.

Program the Radio

1. Programming can only be carried out in a specific working mode (see the above table). If the programming fails, please confirm whether the working mode of the radio is correct.
2. If you don’t need complicated programming to open the E95-DTU (400SL30P-232) configuration software, you can modify the relevant parameters.

Related Products

Precautions for Use

1. Do not operate this radio in the vicinity of some flammable places (such as coal mines) or explosive dangerous objects (such as detonators for detonation).
2. A suitable DC stabilized power supply should be selected, which requires strong anti-high frequency interference, low ripple, and sufficient load capacity; preferably, it should also have over-current, over-voltage protection and lightning protection functions to ensure data transmission The radio is working normally.
3. Do not use it in a working environment that exceeds the environmental characteristics of the digital radio, such as high temperature, humidity, low temperature, strong electromagnetic field or dusty environment.
4. Don’t let the digital radio station continuously be in full load transmitting state, otherwise the transmitter may be burnt out.
5. The ground wire of the digital transmission radio station should be well connected with the ground wire of the external equipment (such as PC, PLC, etc.) and the ground wire of the power supply, otherwise the communication interface may be burnt out; do not plug or unplug the serial port with power on.
6. When testing the digital radio station, you must connect a matching antenna or a 50Ω dummy load, otherwise the transmitter will be easily damaged; if the antenna is connected, the distance between the human body and the antenna should be more than 2 meters to avoid injury. Do not touch the antenna while transmitting.
7. Wireless data transmission stations often have different communication distances in different environments. The communication distance is often affected by temperature, humidity, obstacle density, obstacle volume, and electromagnetic environment; in order to ensure stable communication, it is recommended to reserve 50 % Or more of the communication distance margin.
8. If the measured communication distance is not ideal, it is recommended to analyze and improve the communication distance from the antenna quality and antenna installation method. You can also contact [email protected] for help.
9. When selecting the power supply, in addition to retaining 50% of the current margin as recommended, it should also be noted that its ripple should not exceed 100mV.

Important Statement

1. Mbyte reserves the right of final interpretation and modification of all contents in this manual.
2. Due to the continuous improvement of the hardware and software of the product, this manual may be changed without prior notice. The latest version of the manual shall prevail.

Revision history

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References

• LoRa/ZigBee/WiFi/蓝牙模块-数传电台-无线遥控开关-串口服务器-无线通信模块-成都亿佰特电子科技有限公司