Ebyte E49-400M20S4 Manuale utente

E49-400M20S4

CMT2300A 433/470MHz SMD UART Wireless Module

Contents

Disclaimer...............................................................................................................................................................................2

Features...................................................................................................................................................................................3

1 Introduction......................................................................................................................................................................... 4

1.1 Brief Introduction..................................................................................................................................................... 4

1.2 Application................................................................................................................................................................4

2 Specification and parameter................................................................................................................................................ 5

2.1 Limit parameter........................................................................................................................................................ 5

2.2 Operating parameter................................................................................................................................................. 5

3 Size and pin definition.........................................................................................................................................................6

4 Basic operation.................................................................................................................................................................... 7

4.1 Hardware design....................................................................................................................................................... 7

4.1 Programming............................................................................................................................................................ 7

5 Basic Circuit Diagram......................................................................................................................................................... 8

5.1 Hardware design and circuit schematic diagram...................................................................................................... 8

6 FAQ......................................................................................................................................................................................8

6.1 Communication range is too short............................................................................................................................8

6.2 Module is easy to damage........................................................................................................................................ 8

6.3 BER(Bit Error Rate) is high..................................................................................................................................... 9

7 Guide for Soldering work.................................................................................................................................................... 9

7.1 Reflow soldering temperature.................................................................................................................................. 9

7.2 Reflow soldering curve...........................................................................................................................................10

8 E49 series...........................................................................................................................................................................10

9 Antenna recommendation..................................................................................................................................................10

9.1 Recommendation....................................................................................................................................................10

Revision history....................................................................................................................................................................12

About us................................................................................................................................................................................12

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S4 User Manual

Disclaimer

EBYTE reserves all rights to this document and the information contained herein.

Products, names, logos and designs described herein may in whole or in part be

subject to intellectual property rights. Reproduction, use, modification or disclosure to

third parties of this document or any part thereof without the express permission of

EBYTE is strictly prohibited.

The information contained herein is provided “as is” and EBYTE assumes no

liability for the use of the information. No warranty, either express or implied, is given,

including but not limited, with respect to the accuracy, correctness, reliability and

fitness for a particular purpose of the information. This document may be revised by

EBYTE at any time. For most recent documents, visit www.ebyte.com.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S4 User Manual

Features

The measured communication distance can reach 2.5km;

Maximum transmission power of 100mW, software multi-level adjustable;

Support the global license-free ISM 433MHz band;

Support the data transmission rate of 0.5Kbps～300Kbps;

Support low power consumption mode, suitable for battery applications;

Support GFSK modulation method and OOK and (G)MSK;

Support 1.8V~3.6V power supply;

Industrial grade standard design, support -40 ~ 85 °C for working over a long time;

Support stamp interface, good for secondary development and integration.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S4 User Manual

1 Introduction

1.1 Brief Introduction

E49-400M20S4 is a cost-efective wireless data transmission module launched by

Chengdu Ebyte. It is a pure hardware module based on CMT2300A.

E49-400M20S4 supports a maximum transmit power of 20dBm, and users can set

a lower output power to save power consumption. The module works in the

433/470MHz frequency band. With small size and low power consumption. Since this

module is a pure RF transceiver module, it needs to be driven by an MCU or a

dedicated SPI debugging tool.

1.2 Application

Smart home and industrial sensors, etc;

Security system, positioning system;

Wireless remote control, UAV;

Wireless game remote control;

Healthcare products;

Wireless voice, wireless headset;

Automotive industry applic ations.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S4 User Manual

2 Specification and parameter

2.1 Limit parameter

Main parameter

Performance

Remark

Min.

Max.

Power supply（V）

3.6

Voltage over 3.6V will cause

permanent damage to module

Blocking power（dBm）

Chances of burn is slim when

modules are used in short distance

Operating temperature（℃）

-40

+85

Industrial

2.2 Operating parameter

Main parameter

Performance

Remark

Min

Type

Max

Operating voltage（V）

1.8

3.3

3.6

Over 3.6V may permanently burn the module

Communication level（V）

3.3

Operating temperature（℃）

-40

+85

Industrial grade

Operating frequency（MHz）

410

433

510

Power

Consump

- tion

TX current（mA）

RX current（mA）

8.5

Sleep current （μA）

DutyCycle=OFF,300nA;DutyCycle=ON,800nA

Max TX power（dBm）

Receiving sensitivity（dBm）

-116

-117

-118

Air data rate is 1.2kbps

Main parameter

Description

Remark

Reference distance

2500m

Clear and open, antenna height 2.5 meters, air rate 2.4kbps

Crystal Oscillator

26MHz

Package

SMD

Interface

SPI

3 lines SPI

Size

16*16mm

RF interface

Stamp

Equivalent impedance is about 50Ω

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S4 User Manual

3 Size and pin definition

Pin No.

Item

Direction

Description

GND

Ground wire, connect to power reference ground

GPIO1

Input/Output

See CMT2300A manual for details

GPIO2

Input/Output

See CMT2300A manual for details

GPIO3

Input/Output

See CMT2300A manual for details

VCC

Input/Output

Power supply, 1.8V - 3.6V

SDIO

Input/Output

SPI data pins

SLCK

Input

SPI clock pin

CSB

Input

Chip seleet for SPI access register

FCSB

Input

Chip select for SPI access to FIFO

GND

Ground wire, connect to power reference ground

ANT

Antenna interface

GND

Ground wire, connect to power reference ground

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S4 User Manual

4 Basic operation

4.1 Hardware design

It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible and

the module needs to be reliably grounded;

Please pay attention to the correct connection of the positive and negative poles of the power supply, reverse

connection may cause permanent damage to the module;

Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum,

the module will be permanently damaged;

Please check the stability of the power supply. Voltage can not fluctuate greatly and frequently;

When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the

margin, so the whole machine is beneficial for long-term stable operation;

The module should be as far away as possible from the power supply, transformers, high-frequency wiring and

other parts with large electromagnetic interference;

Bottom Layer High-frequency digital routing, high-frequency analog routing, and power routing must be avoided

under the module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer,

and the copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital

part of the module and routed in the Bottom Layer;

Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom

Layer or other layers, which will affect the module's spurs and receiving sensitivity to varying degrees;

It is assumed that there are devices with large electromagnetic interference around the module that will greatly

affect the performance. It is recommended to keep them away from the module according to the strength of the

interference. If necessary, appropriate isolation and shielding can be done;

Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog,

power traces) around the module that will greatly affect the performance of the module. It is recommended to stay

away from the module according to the strength of the interference.If necessary, appropriate isolation and shielding

can be done;

Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0;

The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure

that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good

antenna extension cable to extend the antenna to the outside;

The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly

weakened.

4.1 Programming

The chip of this module is CMT2300A, and its driving mode is SPI, and users can operate according to the

CMT2300A chip Datasheet;

GPIO1/GPI02/GPI03 are general-purpose I/O ports, see CMT2300A Datasheet for details

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S4 User Manual

5 Basic Circuit Diagram

5.1 Hardware design and circuit schematic diagram

6 FAQ

6.1 Communication range is too short

The communication distance will be affected when obstacle exists;

Data lose rate will be affected by temperature, humidity and co-channel interference;

The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground;

Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea;

The signal will be affected when the antenna is near metal object or put in a metal case;

Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the

distance);

The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the

transmitting power;

Due to antenna quality or poor matching between antenna and module.

6.2 Module is easy to damage

Please check the power supply source, ensure it is within the recommended supply voltage, voltage higher than the

Max will damage the module;

Please check the stability of power source, the voltage cannot fluctuate too much;

Please make sure antistatic measure are taken when insalling and using high frequency devices have electrostatic

susceptibility;

成都亿佰特电子科技有限公司 E49-400M20S4 产品规格书

Please ensure the humidity is within limited range, some parts are sensitive to humidity

Please avoid using modules under too high or too low temperature.

6.3 BER(Bit Error Rate) is high

There are co-channel signal interference nearby, please be away from interference sources or modify frequency and

channel to avoid interference;

The clock waveform on SPI is not standard, check whether there is interference on the SPI line, and the SPI bus line

should not be too long;

Poor power supply may cause messy code. Make sure that the power supply is reliable;

The extension line and feeder quality are poor or too long, so the bit error rate is high.

7 Guide for Soldering work

7.1 Reflow soldering temperature

Profile Feature

Curve characteristics

Sn-Pb Assembly

Pb-Free Assembly

Solder Paste

Solder paste

Sn63/Pb37

Sn96.5/Ag3/Cu0.5

Preheat Temperature min （Tsmin）

Min preheating temp

100℃

150℃

Preheat temperature max (Tsmax)

Mx preheating temp

150℃

200℃

Preheat Time (Tsmin to Tsmax)(ts)

Preheating time

60-120 sec

Average ramp-up rate(Tsmax to Tp)

Average ramp-up rate

3℃/second max

Liquidous Temperature (TL)

Liquid phase temp

183℃

217℃

Time（tL）Maintained Above（TL）

Time below liquid phase line

60-90 sec

30-90 sec

Peak temperature（Tp）

Peak temp

220-235℃

230-250℃

Aveage ramp-down rate（Tp to Tsmax）

Aveage ramp-down rate

6℃/second max

Time 25℃ to peak temperature

Time to peak temperature for

25℃

6 minutes max

8 minutes max

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