Ebyte E49-400M30S User manual

E49-400M30S User Manual
CMT2300A 433/470MHz Chip Hardware Wireless Module

Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
1
Contents
Disclaimer...............................................................................................................................................................................2
Features...........................................................................................................................................................................3
Chapter 1 Overview................................................................................................................................................................4
1.1 Brief introduction..................................................................................................................................................... 4
1.2 Application................................................................................................................................................................4
Chapter 2 Specification & parameter..................................................................................................................................... 5
2.1 Limit parameter........................................................................................................................................................ 5
2.2 Operating parameter................................................................................................................................................. 5
Chapter 3 Size and pin definition........................................................................................................................................... 6
Chapter 4 Basic operation.......................................................................................................................................................7
4.1 Hardware design....................................................................................................................................................... 7
4.2 Programming............................................................................................................................................................ 8
Chapter 5 Basic application....................................................................................................................................................9
5.1 Hardware design & schematics................................................................................................................................ 9
Chapter 6 FAQ........................................................................................................................................................................9
6.1 Transmission distance...............................................................................................................................................9
6.2 Module damage...................................................................................................................................................... 10
6.3 Bit error.................................................................................................................................................................. 10
Chapter 7 Welding instruction.............................................................................................................................................. 11
7.1 Reflow soldering temperature................................................................................................................................ 11
7.2 Reflow soldering curve...........................................................................................................................................11
Chapter 8 E49 series.............................................................................................................................................................12
Chapter 9 Antenna recommendation.................................................................................................................................... 12
9.1 Recommendation.................................................................................................................................................... 12
Revision history....................................................................................................................................................................13
About us................................................................................................................................................................................13

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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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. E49-400M30S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Features
The measured communication distance can reach 5.5km;
Maximum transmitting power 1W, multi-level adjustable;
Support global license-free ISM 433MHz band;
Support data transmission rate between 0.5Kbps ~ 300Kbps;
Supports low power mode, suitable for battery;
Supports GFSK modulation and OOK,(G)MSK;
Support 3.3V~5.5V power supply;
Industrial standard design, support -40 ~ 85°C long time operating;
Support IPEX/ stamp hole interface, users can choose according to their own needs.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Chapter 1 Overview
1.1 Brief introduction
E49-400M30S is a super cost-effective wireless data transmission module
launched by Chengdu YIBEST. It is a hardware module based on CMT2300A.
Customers can develop and use it according to the working environment and
the application conditions of MUC.
E49-400M30S supports a maximum transmission power of 30dBm, and
users can set a lower output power to save consumption. The module works in
433/470MHz frequency band. It features small size and low power
consumption.
Because this module is a pure RF transceiver module, you need to use
MCU drive or specialized SPI debugging tools
1.2 Application
Smart home and industrial sensors;
Security system, positioning system;
Wireless remote control, UAV;
Wireless game remote control;
Healthcare products;
Wireless microphones, wireless headphones；
Automotive industry applications.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
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Chapter 2 Specification & parameter
2.1 Limit parameter
Main parameters
Performance
Remark
minimum
maximum
power supply voltage（V）
0
5.5
Permanently burn modules over
5.5V
Blocking power（dBm）
-
10
The burn rate is low when used at
close range
Working temperature（℃）
-40
+85
Industrial-grade
2.2 Operating parameter
Main parameters
Performance
Remark
minimu
m
typical
maximu
m
Working voltage（V）
3.3
5
5.5
＞5.5V Can cause permanent module
damage
communication level（V）
-
3.3
-
-
Working temperature（℃）
-40
-
+85
Industrial-grade
Working frequency（MHz）
410
433
510
-
Power
consumpti
on
Emission current（mA）
-
650
-
-
Receive current（mA）
-
17
-
-
Sleep current（μA）
-
2
-
-
Maximum transmitting power（dBm）
-
30
-
-
Receiving sensitivity（dBm）
-121
-122
-123
The air rate 1.2kbps
Main parameters
Description
Remark
Reference range
5.5kM
Clear & empty，Antenna height 2.5m，data rate 2.4kbps
FOSC
26MHz
-
package
SMD
-
Communication interface
SPI
SPI
Dimensions
24*38.5mm
-
radio frequency interface
Stamp hole/IPEX
equivalent impedance about 50Ω

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Chapter 3 Size and pin definition
Pin
number
Item
Pin direction
Pin purpose
1
GND
-
Ground
2
GND
-
Ground
3
GND
-
Ground
4
GND
-
Ground
5
GND
-
Ground
6
RXEN
input
RF switch receiving control pin, connected to external MCU IO, high
level effective
7
TXEN
input
RF switch receiving control pin, connected to external MCU IO, high
level effective
8
GPIO3
Input/output
Configurable general IO port (see CMT2300A manual for details)
9
VCC
-
Power supply, range 3.3 ~ 5.5V (external ceramic filter capacitor is
recommended)
10
VCC
-
Power supply, range 3.3 ~ 5.5V (external ceramic filter capacitor is
recommended)
11
GND
-
Ground

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12
GND
-
Ground
13
GPIO2
Input/output
Configurable general IO port (see CMT2300A manual for details)
14
GPIO1
Input/output
Configurable general IO port (see CMT2300A manual for details)
15
FCSB
input
SPI accesses FIFO slice selection
16
CSB
input
SPI accesses FIFO slice selection
17
SDIO
Input/output
SPI data input and output
18
SLCK
input
SPI clock pin
19
NC
-
-
20
GND
-
Ground
21
ANT
-
Antenna interface, stamp hole (50Ω characteristic impedance)
22
GND
-
Ground
Chapter 4 Basic operation
4.1 Hardware design
DC regulated power supply is recommended to power the module, the ripple coefficient of the power supply should
be as small as possible, and the module should be reliably grounded;
Please pay attention to the correct connection of the positive and negative poles of the power supply, such as the
reverse connection may cause permanent damage to the module;
Please check the power supply to ensure that between the recommended power supply voltage, if the maximum
value is exceeded, it will cause permanent damage to the module;
Please check the stability of the power supply. The voltage should not fluctuate greatly and frequently;
In the design of power supply circuit for modules, it is often recommended to retain more than 30% of the
allowance, which is conducive to long-term and stable work;
The module should be far away from the power supply, transformers, high-frequency wiring and other parts with
greater electromagnetic interference;
High-frequency digital wiring, high-frequency analog wiring and power wiring must avoid the Bottom Layer of the
module. If it is really necessary to pass through the Bottom Layer of the module, assuming that the module is
welded on the Top Layer, the Top Layer in the contact part of the module must be copper paved (all copper paved
and well grounded), close to the digital part of the module and wire in the Bottom Layer;
It is also a mistake to assume that modules are soldered or placed in the Top Layer, and that random wiring in the
Bottom Layer or other layers will affect module stray and reception sensitivity to varying degrees;
If there are devices with large electromagnetic interference around the module, it will also greatly affect the
performance of the module. According to the intensity of the interference, it is recommended to stay away from the
module appropriately. If the situation permits, appropriate isolation and shielding can be done;
If there are wires (high frequency digital, high frequency analog, power supply wiring) around the module that have
large electromagnetic interference, it will also greatly affect the performance of the module. According to the
intensity of the interference, it is recommended to stay away from the module appropriately. If the situation permits,
appropriate isolation and shielding can be done;

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Try to stay away from part of the TTL protocol which is also 2.4GHz physical layer，such as USB3.0;
Antenna installation structure has a great impact on module performance, be sure to ensure that the antenna is
exposed, preferably vertical upward. When the module is installed inside the housing, the antenna can be extended
to the outside of the housing by using the high quality antenna extension cord;
Antenna must not be installed inside the metal shell, will lead to the transmission distance greatly weakened.
4.2 Programming
This module is CMT2300A, and its drive mode is SPI. Users can operate in accordance with the CMT2300A chip
book;
GPIO1/GPIO2/GPIO3 is a general I/O port, see CMT2300A manual for detail

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Chapter 5 Basic application
5.1 Hardware design & schematics
Chapter 6 FAQ
6.1 Transmission distance
When there is a linear communication barrier, the communication distance will decay accordingly;
Temperature, humidity and the same frequency interference will lead to the increase of communication packet loss
rate;
The ground absorbs and reflects radio waves, and the test results are poor near the ground;
Sea water has a strong ability to absorb radio waves, so the seaside test results are poor;
If there are metal objects near the antenna or placed in a metal shell, the signal attenuation will be very serious;
Power register set wrong, air speed set too high (the higher the air speed, the closer the distance);
At indoor temperature, the power supply low voltage is lower than the recommended value, the lower the voltage,
the smaller the power;
The use of antenna and module matching degree is poor or the quality of the antenna itself.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
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6.2 Module damage
Please check the power supply to ensure that between the recommended power supply voltage, if the maximum
value is exceeded, it will cause permanent damage to the module;
Please check the stability of the power supply. The voltage should not fluctuate greatly and frequently;
Please ensure anti-static operation during installation and use, and high frequency devices are static sensitive;
Please ensure that the humidity during installation and use is not too high. Some components are humidity sensitive
devices;
If there is no special requirement, it is not recommended to use at too high or too low temperature.
6.3 Bit error
If there is interference of the same frequency signal nearby, keep away from the interference source or modify the
frequency or channel to avoid interference;
SPI clock waveform is not standard, check whether there is interference on SPI line, SPI bus wiring should not be
too long;
Power supply is not ideal may also cause garbled code, be sure to ensure the reliability of the power supply;
Poor or too long extension line, feeder quality, will also cause high bit error rate.

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Chapter 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
60-120 sec
Average ramp-up rate(Tsmax to Tp)
3℃/second max
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
6℃/second max
Time 25℃ to peak temperature
6 minutes max
8 minutes max
7.2 Reflow soldering curve

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
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Chapter 8 E49 series
Product number
Chip
Working
frequency
Transmission
power
Test
distance
Product
size
Packaging
form
Communication
interface
Hz
dBm
km
mm
E49-400T20S
CMT2300A
410~450MHz
20
2.5
26*16
SMD
UART
E49-400T20D
CMT2300A
410~450MHz
20
2.5
36*21
DIP
UART
E49-400M20S
CMT2300A
410~450MHz
20
2.5
20*14
SMD
SPI
E49-400M20S
CMT2300A
410~450MHz
20
2.5
SMD
SPI
Chapter 9 Antenna recommendation
9.1 Recommendation
Antenna is an important role in the communication process, and inferior antennas often have a great impact on the
communication system. Therefore, our company recommends some antennas as the antennas with excellent performance
and reasonable price supporting our wireless module.
Product number
Type
frequency
Gain
Size
Feeder
interface
characteristics
Hz
dBi
mm
cm
TX433-NP-4310
Flexible
PCB
antenna
433M
2
43.8*9.5mm
-
SMA-J
Built-in flexible, FPC soft
antenna
TX433-JW-5
Rubber
antenna
433M
2
50mm
-
SMA-J
Bendable rubber,
omnidirectional antenna
TX433-JWG-7
Rubber
antenna
433M
2.5
75mm
-
SMA-J
Bendable rubber,
omnidirectional antenna
TX433-JK-20
Rubber
antenna
433M
3
210mm
-
SMA-J
Bendable rubber,
omnidirectional antenna
TX433-JK-11
Rubber
antenna
433M
2.5
110mm
-
SMA-J
Bendable rubber,
omnidirectional antenna
TX433-XP-200
Sucker
antenna
433M
4
19cm
200cm
SMA-J
Sucker antenna, high gain
TX433-XP-100
Sucker
antenna
433M
3.5
18.5cm
100cm
SMA-J
Sucker antenna, high gain
TX433-XPH-300
Sucker
antenna
433M
6
96.5cm
300cm
SMA-J
Vehicle-mounted sucker
antenna, ultra-high gain
TX433-JZG-6
Rubber
antenna
433M
2.5
52mm
-
SMA-J
Ultra-short straight,
omnidirectional antenna

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TX433-JZ-5
Rubber
antenna
433M
2
52mm
-
SMA-J
Ultra-short straight,
omnidirectional antenna
TX490-XP-100
Sucker
antenna
490M
50
12cm
100cm
SMA-J
Sucker antenna, high gain
TX490-JZ-5
Rubber
antenna
490M
50
50mm
-
SMA-J
Ultra-short straight,
omnidirectional antenna
Revision history
Version
Revision date
remark
Reviser
1.0
2021-4-19
initial version
Linson
1.1
2021-6-23
Error correction
Linson
About us
Technical support: supp[email protected]m
Documents and RF Setting download link: www.ebyte.com
Thank you for using Ebyte products! Please contact us with any questions or suggestions: [e-mail]
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Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
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