Ebyte E49-900M20S Manuale utente

成都亿佰特电子科技有限公司 E49-900M20S 产品规格书

E49-900M20S User manual

868MHz/915MHz SMD wireless modules

成都亿佰特电子科技有限公司 E49-900M20S 产品规格书

Contents

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

Chapter 1 Introduction.................................................................................................................................................... 3

1.1 Brief introduction..............................................................................................................................................3

1.2 Features.............................................................................................................................................................3

1.3 Application........................................................................................................................................................3

Chapter 2 Specification and parameters............................................................................................................ 4

2.1 Limit parameter.................................................................................................................................................4

2.2 Operating parameter......................................................................................................................................... 4

Chapter 3 Size and pin definition................................................................................................................................... 5

Chapter 4 Basic operation...............................................................................................................................................6

4.1 Hardware design............................................................................................................................................... 6

4.2 Programming.................................................................................................................................................... 6

Chapter 5 Basic application............................................................................................................................................ 7

5.1 Basic circuit...................................................................................................................................................... 7

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............................................................................................................................. 8

7 Welding instruction................................................................................................................................................... 9

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

7.2 Reflow soldering curve.....................................................................................................................................9

8 Related products........................................................................................................................................................ 10

9 Antenna guide............................................................................................................................................................ 10

9.1 Antenna recommendation............................................................................................................................... 10

Revision history............................................................................................................................................................ 11

About us........................................................................................................................................................................ 11

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-900M20S 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. E49-900M20S user manual

Chapter 1 Introduction

1.1 Brief introduction

E49-900M20S is a cost-effective wireless data transmission

module launched by Chengdu Ebyte. It is A pure hardware module based

on CMT2300A.

E49-900M20S Supports the maximum transmission power of

20dBm, users can set a lower output power , thus saving power

consumption.The module works in the 850MHz ~ 930MHz frequency

band, including the commonly used 868MHz and 915MHz frequency

band.

Since this module is a pure RF transceiver module, using SPI

interface, needs MCU driver.

1.2 Features

The measured communication distance can reach 2.5km；

Maximum transmission power of 20dBm，software multi-level adjustable；

Supports ISM 868MHz/915MHz band；

Supports 0.5Kbps～300Kbps transmission rate；

Supports low power mode, suitable for battery；

Supports GFSK modulation mode, OOK & (G)MSK；

Supports 2.6V～3.6V power supply；

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

IPEX and stamp hole optional，good for secondary development and integration.

1.3 Application

Smart home and industrial sensors;

Security, positioning system;

Wireless remote control, UAV;

Wireless game remote control;

Healthcare products;

Wireless voice, wireless headset;

Car industry.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-900M20S user manual

Chapter 2 Specification and parameters

2.1 Limit parameter

Chart 2-1 limit paremeters

Main parameters

Performance

Remark

Min

Max

Power supply（V）

3.6

Voltage over 3.6V will cause permanent

damage to module

Operating temperature（℃）

-40

+85

Industrial-grade

2.2 Operating parameter

Chart 2-2 Operating parameters

Main parameters

Performance

Remark

Min

Type

Max

Power supply（V）

1.8

3.3

3.6

Voltage over 3.6V will cause permanent

damage to module

Communication level（V）

3.3

For 5V TTL, it may be at risk of burning

down

Operating temperature（℃）

-40

+85

Industrial grade

Operating frequency（MHz）

850

868

930

Power

Consump

- tion

TX current（mA）

@TX power 20dBm

RX current（mA）

8.5

Sleep current（nA）

300

800

Max TX power（dBm）

Receiving sensitivity（dBm）

-116

-117

-118

@Air data rate is 1.2kbps

Main parameters

Description

Remark

Reference distance

3km

Test condition：clear and open area, antenna height: 2.5m，air

data rate 2.4kbps

Crystal Oscillator

26MHz

Package

SMT

Communication interface

SPI

Size

20*14mm

Antenna

IPEX/stamp

hole

50 ohm impedance

Weight

1.2±0.1g

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-900M20S user manual

Chapter 3 Size and pin definition

figure 3-1 Size and pin definition

Chart 3-1 pin definition

Pin No.

Item

Direction

Description

GND

Ground

GND

Ground

GND

Ground

GND

Ground

GPIO1

DI/O

Configurable multi-function IO port（see CMT2300A manual for details）

GPIO2

DI/O

Configurable multi-function IO port（see CMT2300A manual for details）

GPIO3

DI/O

Configurable multi-function IO port（see CMT2300A manual for details）

VCC

Power supply +3.3V

GND

Ground

GND

Ground

SCLK

SPI clock pin

SDIO

DI/O

SPI data pin

CSB

SPI register accesser

FCSB

SPI FIFO accesser

GND

Ground

GND

Ground

ANT

RF module stamp hole interface，impedance 50Ω

GND

Ground

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-900M20S user manual

Chapter 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.

4.2 Programming

The core of this module is CMT2300A，its driving method is SPI，the user can operate according to the

CMT2300A chip manual；

GPIO1/GPIO2/GPIO3 are general IO port, see CMT2300A manual for details；

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-900M20S user manual

Chapter 5 Basic application

5.1 Basic circuit

Figure 5-1 circuit

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-900M20S user manual

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 between recommends, voltage higher than the maximum will

damage the module;

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

Please make sure anti-static measure are taken when installing and using, high frequency devices have electrostatic

susceptibility;

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;

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

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-900M20S user manual

7 Welding instruction

7.1 Reflow soldering temperature

Profile Feature

Sn-Pb Assembly

Pb-Free Assembly

Solder Paste

Sn63/Pb37

Sn96.5/Ag3/Cu0.5

Preheat Temperature min （Tsmin）

100℃

150℃

Preheat temperature max (Tsmax)

150℃

200℃

Preheat Time (Tsmin to Tsmax)(ts)

60-120 sec

Average ramp-up rate(Tsmax to Tp)

3℃/second max

Liquidous Temperature (TL)

183℃

217℃

Time（tL）Maintained Above（TL）

60-90 sec

30-90 sec

Peak temperature（Tp）

220-235℃

230-250℃

Aveage ramp-down rate（Tp to Tsmax）

6℃/second max

Time 25℃ to peak temperature

6 minutes max

8 minutes max

7.2 Reflow soldering curve

Indice

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