Ebyte E49-400M20S User manual

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd.
1
E49-400M20S Usermanual
CMT2300A 433MHz/470MHz SMD Module

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
2
Contents
1. Overview.....................................................................................................................................................................3
1.1 Brief Introduction............................................................................................................................................. 4
1.2 Key Features..................................................................................................................................................... 4
1.3 Application........................................................................................................................................................4
2.0 Specification and Parameter..................................................................................................................................... 5
2.1 Limit parameter.................................................................................................................................................5
2.2 Working Parameters..........................................................................................................................................5
3.0 Size and pin definition.............................................................................................................................................. 6
4.0 Hardware and Software Notice.................................................................................................................................7
4.1 Hardware Notice...............................................................................................................................................7
4.2 Software Notice................................................................................................................................................ 7
5.0 Basic Circuit Diagram.............................................................................................................................................. 8
6.0 FAQ...........................................................................................................................................................................9
6.1 Communication range is too short....................................................................................................................9
6.2 Module is easy to damage................................................................................................................................ 9
6.3 BER(Bit Error Rate) is high............................................................................................................................. 9
7.0 Guide for Soldering work....................................................................................................................................... 10
7.1 Reflow soldering temperature........................................................................................................................ 10
7.2 Reflow soldering curve...................................................................................................................................10
8.0 Similar Products with CMT2300A.........................................................................................................................11
9.0 Recommendation for Antennas.............................................................................................................................. 11
Revision history............................................................................................................................................................ 12
About us........................................................................................................................................................................ 12

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd.
3
Disclaimer and copyright notice
The information in this article, including the URL for reference, is subject to change
without notice. The document is provided "as is" without warranty of any kind, including
any warranty of merchantability, fitness for a particular purpose or non-infringement, and
any warranty of any proposal, specification or sample referred to elsewhere. This document
does not bear any liability, including any infringement of any patent rights resulting from
the use of the information contained in this document. No estoppel or other license, express
or implied, is granted herein for the use of intellectual property.
All the test data obtained in this paper are obtained by E-Baite laboratory, and the actual
results may be slightly different.
It is hereby declared that all trade names, trade marks and registered trade marks
mentioned herein are the property of their respective owners.
The right of final interpretation belongs to Chengdu Yibaite Electronic Technology Co.,
LTD.
The attention
The contents of this manual may change due to product version upgrade or other reasons.
E-baite Electronic Technology Co., Ltd. reserves the right to modify the contents of this
manual without any notice or prompt. This manual is only used as a guide, and Chengdu Yibaite
Electronic Technology Co., Ltd. makes every effort to provide accurate information in this
manual, but Chengdu Yibaite Electronic Technology Co., Ltd. does not guarantee that the
content of this manual is completely free of errors, and all statements, information and
Suggestions in this manual do not constitute any express or implied warranty.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
4
1. Overview
1.1 Brief Introduction
E49-400M20S is a cost-effective wireless data transmission module launched by Chengdu
Ebyte. It is a pure hardware module based on CMT2300A.
E49-400M20S supports a maximum transmit power of 20dBm, and users can set a lower
output power to save power consumption. The module works in the 410MHz ~ 510MHz
frequency band, covering the commonly used 433MHz and 470MHz frequency bands.Since
this module is a pure RF transceiver module, it uses an SPI interface and requires an MCU
driver.
1.2 Key Features
The measured communication distance can reach 2.5km;
The maximum transmit power is 20dBm, and the software can be adjusted in multiple levels;
Support ISM 433MHz/470MHz frequency band;
Support data transmission rate from 0.5Kbps to 300Kbps;
Support low power consumption mode, suitable for battery applications;
Support GFSK modulation and OOK and (G)MSK;
Support 2.6V～3.6V power supply;
Industrial grade standard design, support long-term use at -40～85℃;
Support stamp hole and IPEX interface, users can choose to use according to their own needs.
1.3 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 applications.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
5
2.0 Specification and Parameter
2.1 Limit parameter
Table 2-1 Limit parameter table
Main parameter
Performance
Remark
Min.
Max.
Power supply（V）
0
3.6
Voltage over 3.6V will cause permanent
damage to module
Operating temperature（℃）
-40
85
/
2.2 Working Parameters
Table 2-2 Limit parameter table
Main parameter
Performance
Remark
Min.
Typ.
Max.
Operating voltage（V）
1.8
3.3
3.6
Over 3.6V may permanently burn the module
Communication level（V）
-
3.3
-
Using 5V level has the risk of burning
Operating temperature（℃）
-40
-
+85
Industrial grade
Operating frequency（MHz）
410
433
510
-
Power
consumptio
n
TX current（mA）
-
85
@Transm
it power
20dBm
Instant power consumption
RX current（mA）
-
8.5
-
Sleep current （μA）
-
0.1
-
Software is shut down
Max Tx power（dBm）
-
20
-
-
Receiving sensitivity（dBm）
-116
-117
-118
@Air rate is 1.2kbps
Main parameter
Description
Remark
Reference distance
2.5km
Clear and open, antenna height 2.5 meters, air rate 2.4kbps
Crystal frequency
26MHz
-
Packaging method
SMD
-
Communication Interface
SPI
-
Dimensions
20*14mm
-
RF interface
IPEX/stamp hole
Equivalent impedance is about 50Ω
product weight
1.2±0.1g
Clear and open, antenna height 2.5 meters, air rate 2.4kbps

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
6
3.0 Size and pin definition
Image 3-1 Mechanical Dimensions and Pin Definition
Chart 3-1 Pin definition table
No.
Name
Direction
Function
1
GND
-
Ground wire, connect to power reference ground
2
GND
-
Ground wire, connect to power reference ground
3
GND
-
Ground wire, connect to power reference ground
4
GND
-
Ground wire, connect to power reference ground
5
GPIO1
DI/O
Configurable multi-function IO port (see CMT2300A manual for details)
6
GPIO2
DI/O
Configurable multi-function IO port (see CMT2300A manual for details)
7
GPIO3
DI/O
Configurable multi-function IO port (see CMT2300A manual for details)
8
VCC
-
Module power supply, connect to power supply +3.3V
9
GND
-
Ground wire, connect to power reference ground
10
GND
-
Ground wire, connect to power reference ground
11
SCLK
DI
SPI clock pin
12
SDIO
DI/O
SPI data pins
13
CSB
DI
Chip select for SPI access register
14
FCSB
DI
Chip select for SPI access to FIFO
15
GND
-
Ground wire, connect to power reference ground
16
GND
-
Ground wire, connect to power reference ground
17
ANT
-
Module RF stamp hole interface, equivalent impedance is about 50Ω
18
GND
-
Ground wire, connect to power reference ground

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
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4.0 Hardware and Software Notice
4.1 Hardware Notice
It is recommended to use a DC stabilized power supply to supply power to the module. The power supply ripple coefficient 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, such as reverse connection
may cause permanent damage to the module;
Please check the power supply to ensure that it is between the recommended power supply voltage, if exceeding the maximum
value will cause permanent damage to the module;
Please check the power supply stability, the voltage cannot fluctuate significantly and frequently;
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, so
that the whole machine is conducive to long-term stable work;
The module should be as far away as possible from the power supply, transformer, high-frequency wiring and other parts with
large electromagnetic interference;
High-frequency digital traces, high-frequency analog traces, and power traces must be avoided under the module. If it is
absolutely necessary to pass under the module, it is assumed that the module is soldered to the Top Layer, and copper is laid on
the Top Layer of the module contact part (all copper And well grounded), must be close to the digital part of the module and the
wiring is on the Bottom Layer;
Assuming that the module is soldered or placed on the Top Layer, it is also wrong to randomly route on 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 of the module. It is recommended to stay away from the module according to the intensity of the interference. If the
situation permits, proper isolation and shielding can be done;
It is assumed that there are traces with high electromagnetic interference around the module (high-frequency digital,
high-frequency analog, and power traces), which will greatly affect the performance of the module. It is recommended to stay
away from the module according to the intensity of the interference. Isolation and shielding;
Try to stay away from the TTL protocol which is also 2.4GHz in some physical layers, for example: USB3.0;
The antenna installation structure has a great impact on the performance of the module. Make sure that the antenna is exposed,
preferably vertically. When the module is installed inside the chassis, you can use high-quality antenna extension cords to extend
the antenna to the outside of the chassis;
The antenna must not be installed inside the metal shell, which will greatly weaken the transmission distance.
4.2 Software Notice
The chip of this module is CMT2300A, and its driving mode is SPI, and users can operate according to the CMT2300A chip
Datasheet.
GPIO1/GPIO2/GPIO3 are general-purpose I/O ports, see CMT2300A Datasheet for details.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
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5.0 Basic Circuit Diagram
Chart 5-1 circuit diagram

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd.
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6.0 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 2.0V~3.6V, voltage higher than 3.6V 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 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;
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. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
10
7.0 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
60-120 sec
Average ramp-up rate(Tsmax to Tp)
Average ramp-up rate
3℃/second max
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
6℃/second max
Time 25℃ to peak temperature
Time to peak temperature for
25℃
max 6 minutes
max 8 minutes
7.2 Reflow soldering curve

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
11
8.0 Similar Products with CMT2300A
Model
Chip
Freq.
Tx Power
Range
Dim.
Package
Type
Interface
Hz
dBm
km
mm
E49-400T20S
CMT2300A
410~450MHz
20
1
26*16
SMD
UART
E49-400T20D
CMT2300A
410~450MHz
20
1
36*21
DIP
UART
9.0 Recommendation for Antennas
The antenna is very important for the RF module, and the antenna performance will have a great impact on the communication system.
Therefore, we recommend you below antennas which are suitable for Ebyte modules with excellent performance and reasonable price:
Please search the model and see more antenna details on:http://www.ebyte.com/en/product-class.aspx?key=TX
Model
Type
Freq.
Gain
Dim.
Cable Length
Features
Hz
dBi
mm
cm
TX433-JW-5
Rubber
antenna
433M
2
50mm
-
SMA-J
Bendable, omnidirectional
TX433-JWG-7
Rubber
antenna
433M
2.5
75mm
-
SMA-J
Bendable, omnidirectional
TX433-JK-20
Rubber
antenna
433M
3
210mm
-
SMA-J
Bendable, omnidirectional
TX433-JK-11
Rubber
antenna
433M
2.5
110mm
-
SMA-J
Bendable, omnidirectional
TX433-XP-200
Magnetic
base antenna
433M
4
19cm
200cm
SMA-J
magnet base, high gain
TX433-XP-100
Magnetic
base antenna
433M
3.5
18.5cm
100cm
SMA-J
magnet base, high gain
TX433-XPH-300
Magnetic
base antenna
433M
6
96.5cm
300cm
SMA-J
magnet base, ultra high gain
TX433-JZG-6
Rubber
antenna
433M
2.5
52mm
-
SMA-J
Ultra short straight,
omnidirectional
TX433-JZ-5
Rubber
antenna
433M
2
52mm
-
SMA-J
Ultra short straight,
omnidirectional
TX490-XP-100
Magnetic
base antenna
490M
50
12cm
100cm
SMA-J
magnet base, high gain
TX490-JZ-5
Rubber
antenna
490M
50
50mm
-
SMA-J
Ultra short straight,
omnidirectional

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M20S User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd.
12
Revision history
Version
Date
Remark
By
1.0
2020-05-28
First version
Huaa
1.1
2020-11-16
Parameter correction
Linson
1.2
2021-6-10
Parameter correction
Linson
1.3
2021-6-23
Error correction
Linson
About us
Technical support: [email protected]
Documents and RF Setting download link: www.ebyte.com
Thank you for using Ebyte products! Please contact us with any questions or suggestions: [email protected]
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Fax: [phone] Web: www.ebyte.com
Address: B5 Mould Industrial Park, 199# Xiqu Ave, High tech Zone, Chengdu, Sichuan, China