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Analog Wireless Data Transmission Radio
E820-DTU(2I2-433L )
U s e r
M a n u a l
This manual may be changed as the product is continuously improved. Please refer to the latest version of the manual.
Chengdu Ebyte Electronic Technology Co., Ltd. reserves the right of final interpretation and modification of all contents in this statement
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Table of Contents
Summary of Contents for Ebyte E820-DTU
- Page 1 This manual may be changed as the product is continuously improved. Please refer to the latest version of the manual. Chengdu Ebyte Electronic Technology Co., Ltd. reserves the right of final interpretation and modification of all contents in this statement...
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Page 2: Table Of Contents
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual Table of contents Chapter 1 Product Introduction ..................................2 1.1. Product Introduction ..............................2 1.2. Features ..................................2 Chapter 2 Quick Start ....................................3 Connection method of each port ............................3 2.1.1... -
Page 3: Chapter 1 Product Introduction
Chapter 1 Product Introduction 1.1. Product Introduction E820-DTU (2I2-433L) is an analog wireless data transmission radio that supports remote control products such as analog following and control acquisition. It supports wireless Modbus RTU protocol in control acquisition mode. This product is highly easy to use and users can easily and quickly integrate it into their own system to achieve remote control based on 433MHz wireless. -
Page 4: Chapter 2 Quick Start
Chapter 2 Quick Start This chapter is a quick introduction to the E820-DTU (2 I 2-433L) series products. It is recommended that users read this chapter systematically and follow the instructions to have a systematic understanding of the module products. Users can also select the chapters they are interested in to read as needed. -
Page 5: Rs485 Connection
2.2 Getting Started with the Follow Feature Prepare two E820-DTU (2I2-433L) devices, device A and device B, and ensure that the parameter configuration is consistent ( use the default parameters). Use the DIP switch to configure the working mode. Device A is configured to follow the transmission mode and device B is configured to follow the receiving mode. -
Page 6: Quick Start To Control Collection Function
2.3 Quick Start to Control Acquisition Function Prepare an E820-DTU (2I2-433L) device and an E90-DT U radio. The wireless communication of the devices adopts the Modbus RTU protocol. Refer to the wireless channel code value table and wireless response time code value table below to configure the wireless parameters of the E90-DT U radio to be consistent with the E820-DTU (2I2-433L) device. -
Page 7: Chapter 2 Performance Parameters
E 820 -DTU (2I2-433L) User Manual In acquisition mode, for example, the E90-DT U radio can read the 1-channel input of the E820-DTU (2I2-433L) device through the command 01 03 00 11 00 01 D4 0F. If the input is 10 mA , the ideal data returned can be 01 03 02 27 10 A2 78 . Where 0x2710H converts to 10000 D , which is 10.000 mA . -
Page 8: Chapter 3 Installation Dimensions
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual Chapter 3 Installation Dimensions Copyright@2025, Chengdu Ebyte Electronic Technology Co.,Ltd. -
Page 9: Chapter 4 Description Of Each Part
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual Chapter 4 Description of each part Serial Standard numb Function Description Definition AI1+ Analog signal input channel 1 Analog signal input pin, forming an input with AI1- positive... -
Page 10: Reset Button Description
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual indication indicates receiving data (channel 1) Wireless transmit/receive data Two-color light, blue light indicates transmitting data, green light indication indicates receiving data ( channel 2) Antenna interface 433MHz Antenna... -
Page 11: Chapter 5 Parameter Configuration
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual When the follow function is used, the Mode 2 Follow Receive receiving end Configuration Host computer configuration related Mode 3 parameters parameters Chapter 5 Parameter Configuration 5.1 Parameter configuration mode Configuration mode ( M1M0=11 ), you can configure the parameters through the host computer : 5.2 Parameter configuration steps... -
Page 12: Parameter Interpretation
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual Parameter configuration step three: Read parameters. Parameter configuration step 4: Write parameters. 5.3 Parameter interpretation Factory Reset Copyright@2025, Chengdu Ebyte Electronic Technology Co.,Ltd. -
Page 13: Chapter 6 Modbus
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual Restore all parameters to default settings. Response time There are 6 levels, namely 1.5s , 0.5s , 0.25s , 0.2s , 0.15s , 0.1s , and the default is 0.25s . The response time between communication devices must be consistent. -
Page 14: Wireless Channel Code Value Table
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual 400 66 (0x0041) AO1 output, actual value ( mA ) Read/Write 0 -20000 400 67 (0x0042) AO2 output, actual value ( mA ) Read/Write 400 82 (0x0051) Device Address... -
Page 15: 03" Read Multiple Registers
Chengdu Ebyte Electronic Technology Co., Ltd. E 820 -DTU (2I2-433L) User Manual Device ModBus Read Read returns the number of Reading the return value CRC checksum address Command bytes The above 0x2710H converts to 10000D , which is 10.000mA ( ideal value ) . -
Page 16: Chapter 9 Precautions For Use
100mV. Chapter 10 Important Statement Ebyte reserves the final right of interpretation and modification of all contents in this manual. Due to the continuous improvement of the product hardware and software, this manual may be changed without prior notice. The latest version of the manual shall prevail. -
Page 17: Chapter 11 Revision History
Contact us Technical support: support@cdebyte.com Documents and RF Setting download link: www.cdebyte.com Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com ------------------------------------------------------------------------------------------------- Phone: +86 028-61399028 Web: www.cdebyte.com Address: B5 Mould Park, 199# Xiqu Ave, High-tech District, Sichuan, China...
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