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Ebyte E49-900M20S - User Manual

Ebyte E49-900M20S
12 pages
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亿 E49-900M20S
Copyright ©20122021Chengdu Ebyte Electronic Technology Co.,Ltd.
E49-900M20S User manual
868MHz/915MHz SMD wireless modules
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Ebyte E49-900M20S Specifications

General IconGeneral
ModulationFSK
Transmission Power20dBm
InterfaceUART
Operating Temperature-40 to +85 °C
Frequency Range868-915 MHz

Summary

Disclaimer

Chapter 1 Introduction

1.1 Brief introduction

Overview of the cost-effective wireless data transmission module.

1.2 Features

Lists key features like transmission power, frequency, data rate, and compatibility.

1.3 Application

Outlines various industrial and consumer applications for the module.

Chapter 2 Specification and parameters

2.1 Limit parameter

Defines the absolute maximum and minimum operating parameters to prevent damage.

2.2 Operating parameter

Details the module's typical operating specifications like voltage, frequency, and current.

Chapter 3 Size and pin definition

Chapter 4 Basic operation

4.1 Hardware design

Guidelines for power supply, layout, and antenna placement for optimal performance.

4.2 Programming

Information on the core chip and communication interface (SPI) for programming.

Chapter 5 Basic application

5.1 Basic circuit

Provides a schematic diagram for connecting the module in a typical circuit.

6 FAQ

6.1 Communication range is too short

Explains factors affecting communication distance and potential solutions.

6.2 Module is easy to damage

Lists precautions to avoid damaging the module during handling and operation.

6.3 BER(Bit Error Rate) is high

Addresses causes for high bit error rates and methods to improve reliability.

7 Welding instruction

7.1 Reflow soldering temperature

Specifies temperature profiles for Sn-Pb and Pb-Free solder assembly.

7.2 Reflow soldering curve

Illustrates the recommended temperature-time curve for reflow soldering.

8 Related products

9 Antenna guide

9.1 Antenna recommendation

Recommends specific antennas for improved communication system performance.

Revision history

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