Ebyte E30-433T20S3 User manual

E30-433T20S3 User Manual
SI4438 433MHz 100mW SMD Wireless Module

CONTENTS
1. OVERVIEW..................................................................................................................................... 1
1.1 INTRODUCTION..............................................................................................................................................................1
1.2 FEATURES...................................................................................................................................................................... 1
1.3 APPLICATION................................................................................................................................................................. 2
1.4 FUNCTION INTRODUCTION............................................................................................................................................ 2
2. SPECIFICATION AND PARAMETER........................................................................................ 2
2.1 LIMIT PARAMETER.........................................................................................................................................................2
2.2 OPERATING PARAMETER................................................................................................................................................ 2
3. SIZE AND PIN DEFINITION........................................................................................................3
4. CONNECT TO MCU.......................................................................................................................5
5. FUNCTION DESCRIPTION..........................................................................................................5
5.1 FIXED TRANSMISSION....................................................................................................................................................5
5.2 BROADCASTING TRANSMISSION.................................................................................................................................... 6
5.3 BROADCASTING ADDRESS............................................................................................................................................. 6
5.4 MONITOR ADDRESS....................................................................................................................................................... 6
5.5 RESET............................................................................................................................................................................6
5.6 AUX DESCRIPTION........................................................................................................................................................ 7
5.6.1 Indication of UART output....................................................................................................................................7
5.6.2 Indication of wireless transmitting........................................................................................................................ 7
5.6.3 Configuration procedure of module...................................................................................................................... 8
5.6.4 Notes for AUX.......................................................................................................................................................8
6. OPERATING MODE...................................................................................................................... 8
6.1 MODE SWITCHING......................................................................................................................................................... 9
6.2 NORMAL MODE（MODE 0）........................................................................................................................................ 9
6.3 WAKE UP MODE（MODE 1）......................................................................................................................................10
6.4 POWER-SAVING MODE（MODE 2）............................................................................................................................ 10
6.5 DEEP SLEEP MODE（MODE 3）.................................................................................................................................. 10
7. REGISTER READ AND WRITE CONTROL........................................................................... 11
7.1 COMMAND FORMAT.....................................................................................................................................................11
7.2 FACTORY DEFAULT PARAMETER...................................................................................................................................11
7.3 READING OPERATING PARAMETERS............................................................................................................................11
7.4 READING VERSION NUMBER.......................................................................................................................................12
7.5 RESET INSTRUCTION................................................................................................................................................... 12
7.6 PARAMETER SETTING INSTRUCTION........................................................................................................................... 12
8. HARDWARE DESIGN..................................................................................................................14
9. FAQ..................................................................................................................................................15
9.1 COMMUNICATION RANGE IS TOO SHORT......................................................................................................................15
9.2 MODULE IS EASY TO DAMAGE.....................................................................................................................................15

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9.3 BER(BIT ERROR RATE)IS HIGH..................................................................................................................................16
10. PRODUCTION GUIDANCE......................................................................................................16
10.1 REFLOW SOLDERING TEMPERATURE..........................................................................................................................16
10.2 REFLOW SOLDERING CURVE......................................................................................................................................17
11. E30 SERIES.................................................................................................................................. 17
12. ANTENNA RECOMMENDATION........................................................................................... 18
13. PACKAGE FOR BATCH ORDER............................................................................................ 19
14.REVISION HISTORY..................................................................................................................19
15.ABOUT US.....................................................................................................................................19

Chengdu Ebyte Electronic Technology Co., Ltd. E30-433T20S3 User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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1. Overview
1.1 Introduction
E30-433T20S3 is a UART module based on Silicon Labs'
SI4438. It features half-duplex with transparent transmission,
SMD packing, TTL level output, WOR and 433MHz working
frequency. This product has been mass-produced and can be
used in a wide range of environments and industries.
The module has a software FEC forward error correction
algorithm, which has high coding efficiency and strong error
correction capability. In the case of sudden interference, it can
actively correct the interfered data packets, greatly improving
reliability and transmission distance. When without FEC, such
packets can only be discarded. The module has data encryption. Data transmitted over the air, with randomness, makes
data interception meaningless through strict encryption and decryption algorithms. The function of data compression
decreases the transmission time & probability of being interfered, while improving the reliability & transmission
efficiency.
E30-433T20S3 series strictly stick to the design rules home and abroad of FCC, CE, CCC and meet the related RF
certifications and export standards.
1.2 Features
Communication distance tested is up to 2.5km
Maximum transmission power of 100mW, software multi-level adjustable；
Support the global license-free ISM 433MHz band；
Support air date rate of 1kbps～25kbps Mbps；
Low power consumption for battery supplied applications；
Support 2.3V~5.2V power supply, power supply over 3.3V can guarantee the best performance；
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

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1.3 Application
Home security alarm and remote keyless entry;；
Smart home and industrial sensors；
Wireless alarm security system；
Building automation solutions；
Wireless industrial-grade remote control；
Intelligent agriculture &oil field solution；
Health care products；
Advanced Meter Reading Architecture(AMI)；
Automotive industry applications.
1.4 Function introduction
2. Specification and parameter
2.1 Limit parameter
Main parameter
Performance
Remark
Min.
Max.
Power supply（V）
0
5.2
Voltage over 5.2V will cause permanent
damage to module
Blocking power（dBm）
-
10
Chances of burn is slim when modules are
used in short distance
Operating temperature（℃）
-40
85
/
2.2 Operating parameter
Main parameter
Performance
Remark
Min.
Typ.
Max.
Operating voltage（V）
2.3
5.0
5.2
≥3.3V ensures output power
Communication level（V）
3.3
For 5V TTL, it may be at risk of burning
down
Operating temperature（℃）
-40
-
85
Industrial design
Operating frequency（MHz）
425
-
450.5
Support ISM band
Power
consumpti
on
TX current（mA）
88
Instant power consumption
RX current（mA）
16
Sleep current （μA）
4
Software is shut down
Max Tx power（dBm）
19.3
20.0
20.6
Receiving sensitivity（dBm）
-113
-114
-115
Air data rate is 1.0 kbps
Air data rate（bps）
1k
5k
25k
Controlled via user’s programming

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Main parameter
Description
Remark
Distance for reference
2500m
Test condition：clear and open area, antenna gain: 5dBi，
antenna height: 2.5m，air data rate: 2.4kbps
TX length
58 Byte
The maximum capacity of a single package
Buffer
512 Byte
Modulation
GFSK
Communication interface
TTL
Package
SMD
Connector
1.27mm
Size
16 * 26 mm
Antenna
IPEX/stamp hole
50 ohm impedance
3. Size and pin definition
No.
Name
Direction
Function

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1
GND
Ground
2
GND
Ground
3
GND
Ground
4
GND
Ground
5
M0
Input
（weak pull-up）
Work with M1 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
6
M1
Input
（weak pull-up）
Work with M0 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
7
RXD
Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be
configured as open-drain or pull-up input.
8
TXD
Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be
configured as open-drain or push-pull output
9
AUX
Output
To indicate module ’ s working status & wakes up the external MCU. During the
procedure of self-check initialization, the pin outputs low level. Can be
configured as push-pull output (suspending is allowed).
10
VCC
Power supply ：2.3~ 5.2V DC
11
GND
Ground
12
NC
13
GND
Ground
14
NC
15
NC
16
NC1
17
NC2
18
NC3
19
GND
Ground
20
GND
Ground
21
ANT
Antenna
22
GND
Ground

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4. Connect to MCU
No.
Description（STM8L MCU）
1
The UART module is TTL level.
2
For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.
5. Function description
5.1 Fixed transmission

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5.2 Broadcasting transmission
5.3 Broadcasting address
For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data,
the purpose of broadcast is realized.
5.4 Monitor address
For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of
monitor is realized.
5.5 Reset
When the module is powered, AUX outputs low level immediately, conducts hardware self-check and sets the operating
mode based on user’s parameters. During the process, the AUX remains low level. After the process completed, the AUX
outputs high level and starts to work as per the operating mode combined by M1 and M0. Therefore, users need to wait
the AUX rising edge as the start of module’s normal work.

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5.6 AUX description
AUX Pin can be used as indication for wireless send & receive buffer and self-check.
It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been
sent through UART, or whether the module is still in the process of self-check initialization.
5.6.1 Indication of UART output
To wake up external MCU
5.6.2 Indication of wireless transmitting
Buffer (empty): the internal 512 bytes data in the buffer are written to the RFIC (Auto sub-packaging). When
AUX=1, the user can input data less than 512 bytes continuously without overflow. Buffer (not empty): when AUX=0,
the internal 512 bytes data in the buffer have not been written to the RFIC completely. If the user starts to transmit data at
this circumstance, it may cause overtime when the module is waiting for the user data, or transmitting wireless sub
package. When AUX = 1, it does not mean that all the UART data of the module have been transmitted already, perhaps
the last packet of data is still in transmission.

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5.6.3 Configuration procedure of module
Only happened when power-on resetting or exiting sleep mode
5.6.4 Notes for AUX
No.
Description
1
For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means if it
meets each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX outputs
high level.
2
When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since AUX
outputs high level, the mode switch will be completed.
3
After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for 2ms . If
AUX stays on the high level, the operating mode switch can be effected immediately.
4
When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will reset
user parameters, during which AUX outputs low level.
6. Operating mode
There are four operating modes, which are set by M1 and M0, the details are as follows:
Mode(0-3)
M1
M0
Description
Remark
0 Normal mode
0
0
UART and wireless channel are open, transparent transmission
is on
The receiver must work in
mode 0 or mode 1
1 Wake-up
0
1
UART and wireless channel are open. The difference between
normal
mode and wake-up mode is that it will add preamble code
automatically before data packet transmission so that it can
awaken
the receiver works in mode 2
The receiver can work in
mode 0, mode 1 or mode 2
2 Power-saving Mode
1
0
Users can access the register through the serial port to control
the working state of the module
1. The transmitter must
work in mode 1
2. Transmitting is not
allowed in this mode
3 sleep mode
1
1
Parameter setting
More in working parameter

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6.1 Mode switching
No.
Remark
1
Users can combine M1 and M0 with high and low levels to determine the operating mode. Two GPIOs of the MCU can
be used to control mode switching;
After changing M1 and M0: If the module is idle, after 1ms, it can start working according to the new mode;
If the serial port data of the module has not been transmitted through the wireless, the new working mode can be
switched after the transmission is completed;
If the module receives the wireless data and transmits the data through the serial port, it needs to finish transmission
before switching the new working mode;
Therefore, mode switching can only be valid when AUX output is 1, otherwise it will delay switching.
2
For example, users continuously inputs a large amount of data and simultaneously performs mode switching. At this
time, the switching mode operation is invalid; the module will process all the user data before performing the new mode
detection;
Therefore, the general recommendation is to detect the output state of the AUX pin and switch after 2ms when the
output is high.
3
When the module is switched from other modes to sleep mode, if the data has not been processed yet;
The module will process these data (including receiving and sending) before entering sleep mode. This feature can be
used for fast sleep, which saves power; for example, the transmitter module works in mode 0, the user transmits the
serial port data "12345", and then does not have to wait for the AUX pin to be idle (high level), and can directly switch
to sleep mode. And the user's main MCU immediately sleeps, the module will automatically transmit the user data
through the wireless, and automatically enters sleep within 1ms;
This saves MCU's working time and reduces power consumption.
4
Similarly, any mode switching can use this feature. After the module processes the current mode event, it will
automatically enter the new mode within 1ms; thus eliminating the need for the user to query AUX and achieve the
purpose of fast switching;
For example, switching from the transmit mode to the receive mode; the user MCU can also enter sleep before the mode
switch, and use the external interrupt function to acquire the AUX change, thereby performing mode switching.
5
This operation mode is very flexible and efficient, and is designed according to the user's MCU's operation convenience,
and can reduce the workload of the entire system as much as possible, improve system efficiency, and reduce power
consumption.
6.2 Normal mode（Mode 0）
Type
M0 = 0，M1 = 0
Transmitting
The module can receive the user data via serial port, and transmit wireless data package of 58 bytes. When the data
inputted by user is up to 58 byte, the module will start wireless transmission. During which the user can input data
continuously for transmission.
When the required transmission bytes are less than 58 bytes, the module will wait 3-byte time and treat it as data
termination unless continuous data inputted by user. Then the module will transmit all the data through wireless
channel.
When the module receives the first data packet from user, the AUX outputs low level.
After all the data are transmitted into RF chip and transmission start , AUX outputs high level.
At this time, it means that the last wireless data package transmission is started, which enables the user to input another
512 bytes continuously. The data package transmitted from the module working in mode 0 can only be received by the

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module working in mode 0 or 1.
Receiving
The wireless receiving function of the module is on, the data packet transmitted from the module working in mode 0 &
mode 1 can be received.
After the data packet is received, the AUX outputs low level, 5ms later the module starts to transmit wireless data
through serial port TXD pin.
After all the wireless data have been transmitted via serial port, the AUX outputs high level.
6.3 Wake up mode（Mode 1）
Type
M0 = 1，M1 =0
Transmitting
The condition of data packet transmission & AUX function is the same as mode 0. The only difference is that the
module will add preamble code before each data packet automatically. The preamble code length depends on the
wake-up time set in the user parameters. The purpose of the preamble code is waking up the receiving module works in
mode 2. Therefore, the data package transmitted from mode 1 can be received by mode 0, mode1 and mode 2.
Receiving
The same as that in mode 0.
6.4 Power-saving mode（Mode 2）
Type
M0 = 0，M1 = 1
Transmitting
UART is closed, the module cannot receive any serial port data from outside MCU.
Hence the function of wireless transmission is not available for the module working in this mode.。
Receiving
In mode 2, it is required the data transmitter works in mode 1.
The wireless module monitors the preamble code at regular time.
Once it gets the preamble code, it will remain as receiving status and waiting for the completion of receiving the entire
valid data package.
Then the AUX outputs low level, 5ms later the serial port is open to transmit received wireless data through TXD. Finally,
AUX outputs high level after process completed.
The wireless module stays in “power-saving – monitoring” working status (polling).
By setting different wake-up time, the module will have different receiving response delay (2s in maximum) and average
power consumption (30uA in minimum).
6.5 Deep sleep mode（Mode 3）
Type
M0 = 1，M1 = 1
Transmitting
Unable to transmit wireless data
Receiving
Unable to receive wireless data
Parameter
setting
This mode can be used for parameter setting. It uses serial port 9600 & 8N1 to set module working parameters through
specific instruction format. (please refer to parameters setting for details)
Note
When the mode changes from sleep mode to others, the module will reset its parameters, during which the AUX keeps low
level and then outputs high level after reset completed. User is recommended to check the AUX rising edge.

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7. Register read and write control
7.1 Command format
In sleep mode (mode 3: M0 = 0, M1 = 1), the list of supported commands are as follows (only 9600, 8N1 format is
supported when)：
No.
Instruction
format
Illustration
1
C0+ working
parameters
C0 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and
must
be sent in succession.
( Save the parameters when power-down )
2
C1+C1+C1
Three C1 are sent in hexadecimal format. The module returns the saved parameters and
must be sent in succession.
3
C2+working
parameters
C2 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and
must
be sent in succession. ( Do not save the parameters when power-down )
4
C3+C3+C3
Three C3 are sent in hexadecimal format. The module returns the version information
and
they must be sent in succession.
5
C4+C4+C4
Three C4 are sent in hexadecimal format. The module will reset one time and they
must be
sent in succession.
7.2 Factory default parameter
Factory default parameters：62 00 00 00 00 00
Model No.
Frequency
Address
Channel
Air data rate
Baud rate
Parity format
Power
E30-433T20S3
433MHz
0x0000
0x50
1kbps
9600
8N1
22dbm
7.3 Reading Operating Parameters
Instruction format
Description
C1+C1+C1
In sleep mode（M0=1，M1=1），
User gives the module instruction (HEX format): C1 C1 C1,
Module returns the present configuration parameters.
For example, C0 00 00 1A 17 44.

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7.4 Reading Version Number
Instruction format
Description
C3+C3+C3
In sleep mode（M0=1，M1=1）,
User gives the module instruction (HEX format): C3 C3 C3,
Module returns its present version number, for example C3 32 xx yy；
The second byte represents the frequency,if it is 32,means 433MHz; if it is 38,,means
470MHz;if it is 45,means 868MHz;if it is 44,means 915MHz;if it is 46,means 170MHz;xx is
the version number and yy refers to the other module features.
7.5 Reset Instruction
Instruction format
Description
C4+C4+C4
In sleep mode（M0=1，M1=1）,
User gives the module instruction (HEX format): C4 C4 C4, the module resets for one time.
During the reset process, the module will conduct self-check, AUX outputs low level. After
reset completing, the AUX outputs
high level, then the module starts to work regularly which the working mode can be switched
or be given another instruction.
7.6 Parameter Setting Instruction
0
Item
Description
Remark
0
HEAD
Fix 0xC0 or 0xC2, it means this frame data is control command
Must be 0xC0 or 0xC2
C0: Save the parameters when
power-down
C2: Do not save the parameters when
power-down
1
ADDH
High address byte of module
（the default 00H）
00H-FFH
2
ADDL
Low address byte of module
（the default 00H）
00H-FFH
3
SPED
7
6
UART parity bit
UART mode can be different
between
communication parties
0
0
8N1（default）
0
1
8O1
1
0
8 E1
1
1
8N1（equal to 0000）
5
4
3
TTL UART baud rate（bps）
UART mode can be different
between communication parties
The UART baud rate has nothing to
do with wireless transmission
parameters &won’t affect the
wireless transmit /receive features.
0
0
0
1200bps
0
0
1
2400pbs
0
1
0
4800pbs
0
1
1
9600bps（default）
1
0
0
19200bps

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1
0
1
38400bps
1
1
0
57600bps
1
1
1
115200bps
2
1
0
Air data rate（bps）
The lower the air data rate, the longer
the transmitting distance, better
anti-interference performance and
longer transmitting time
The air data rate must keep the same
for both communication parties.
0
0
0
1k bps
0
0
1
2kbps
0
1
0
5kbps（Default）
0
1
1
8kbps
1
0
0
10kbps
1
0
1
15kbps
1
1
0
20kbps
1
1
1
25kbps
4
CHAN
Communication channel
00H-FFH，for 425 ~ 450.5MHz
4 ~0，Communication frequency（425M + CHAN * 0.1M），default
50H（433M）
5
OPTION
7
Fixed transmission（similar to MODBUS）
In fixed transmission mode, the first
three bytes of each user's data frame
can be used as high/low address and
channel.
The module changes its address and
channel when transmit. And it will
revert to original setting after
complete the process.
0
Transparent transmission mode
1
Fixed transmission mode
6
IO drive mode（the default 1）
This bit is used to the module
internal pull-up resistor. It also
increases the level’s adaptability in
case of open drain. But in some
cases, it may need external pull-up
resistor.
1
TXD、AUX push-pull outputs, RXD pull-up inputs
0
TXD、AUX open-collector outputs, RXD open-collector
inputs
5
4
3
wireless wake-up time
The transmit & receive module work
in mode 0, whose delay time is
invalid & can
be arbitrary value.
The transmitter works in mode 1 can
transmit the preamble code of the
corresponding time continuously.
When the receiver works in mode 2,
the time means the monitor interval
time(wireless wake-up). Only the
data from transmitter that works in
mode 1 can be received.
0
0
0
250ms（default）
0
0
1
500ms
0
1
0
750ms
0
1
1
1000ms
1
0
0
1250ms
1
0
1
1500ms
1
1
0
1750ms
1
1
1
2000ms

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2
FEC switch
After turn off FEC, the actual data
transmission rate increases while
anti-interference ability decreases.
Also the transmission distance is
relatively short.
Both communication parties must
keep on the same pages about
turn-on or turn-off FEC.
0
Turn off FEC
1
Turn on FEC（Default）
1
0
transmission power (approximation)
The external power must make sure
the ability of current output more
than 250 mA and ensure the power
supply ripple within 100mV.
Low power transmission is not
recommended due to its low power
supply efficiency.
0
0
20dBm（Default）
0
1
17dBm
1
0
14dBm
1
1
10dBm
For example: The meaning of No.3 "SPED" byte
The binary bit of the byte
7
6
5
4
3
2
1
0
The specific value
( configured by user)
0
0
0
1
1
0
1
0
Meaning
UART parity bit
8N1
UART baud rate is 9600
Air data rate is 2.4k
Corresponding hexadecimal
1
A
8. 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 it is within the recommended voltage otherwise when it exceeds the
maximum value the module will be permanently damaged；
Please check the stability of the power supply, the voltage can not be fluctuated 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.；
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；

Chengdu Ebyte Electronic Technology Co., Ltd. E30-433T20S3 User manual
Copyright ©2012 – 2018 ， Chengdu Ebyte Electronic Technology Co.,Ltd.
15
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.
If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is
still a risk of damage)；
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.
9. FAQ
9.1 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.
9.2 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.

Chengdu Ebyte Electronic Technology Co., Ltd. E30-433T20S3 User manual
Copyright ©2012 – 2018 ， Chengdu Ebyte Electronic Technology Co.,Ltd.
16
9.3 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;
10. Production guidance
10.1 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

Chengdu Ebyte Electronic Technology Co., Ltd. E30-433T20S3 User manual
Copyright ©2012 – 2018 ， Chengdu Ebyte Electronic Technology Co.,Ltd.
17
10.2 Reflow soldering curve
11. E30 series
Model No.
Core IC
Frequency
Hz
Tx power
dBm
Distance
km
Package
Size
mm
Antenna
E30-433T20S3
SI4438
433M
20
2.5
SMD
16 * 26
IPEX/Stamp hole
E30-780T20S
SI4463
780M
20
2.5
SMD
17 * 30
IPEX/Stamp hole/Spring
antenna
E30-868T20D
SI4463
868M
20
2.5
DIP
21 * 36
SMA-K
E30-868T20S
SI4463
868M
20
2.5
SMD
17 * 30
IPEX/Stamp hole/Spring
antenna
E30-170T27D
SI4463
170M
27
5
DIP
24 * 43
SMA-K
E30-170T20D
SI4463
170M
20
2
DIP
21 * 36
SMA-K
E30-915T20S
SI4463
915M
20
2.5
SMD
17 * 30
IPEX/Stamp hole/Spring
antenna
E30-915T20D
SI4463
915M
20
2.5
DIP
21 * 36
SMA-K
E30-490T20S
SI4438
490M
20
2.5
SMD
17 * 30
IPEX/Stamp hole/Spring