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E61-TTL-50
User Manual
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Ebyte E61 Series, E61-TTL-1W, E61-TTL-50 User Manual

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Page 1
Wireless UART Module
E61 Series
All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co., Ltd.
User Manual
Page 2
Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 2 / 18
Version
Date
Description
Issued by
1.00
2017/12/13
Initial version
huaa
Brief Introduction
performance MCU, high-speed RF chip and transparent transmission.
57600/38400/19200/9600 etc. Air data rate, FEC, password etc. are configurable for users when module works in fixed-length transmission.
The high-speed feature of module is suitable for polling sampling, handshake response communication, and supports Modbus protocols.
becomes pointless. 65536 configurable addresses are reserved for user to define, which makes the module with matched password receive
Model
Frequency
Transmitting power
Distance
Packing
Antenna
E61-TTL-50
433M
17dBm
1000m
DIP
SMA-K
E61-TTL-1W
433M
30dBm
2500m
DIP
SMA-K
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 3 / 18
Contents
1. Features ..................................................................................................................................................... 5
2. Technical Parameters ........................................................................................................................... 5
2.1 Electrical Parameters ................................................................................................................................................. 6
2.1.1 E61-TTL-50 .............................................................................................................................................................................. 6
2.1.2 E61-TTL-1W ............................................................................................................................................................................ 6
2.3 Parameters Notes ...................................................................................................................................................... 6
3. Mechanical Characteristics ................................................................................................................ 7
3.1 E61-TTL-50 .................................................................................................................................................................. 7
3.1.1 Dimension ................................................................................................................................................................................ 7
3.1.2 Pin Definition ........................................................................................................................................................................... 7
3.2 E61-TTL-1W ................................................................................................................................................................ 8
3.2.1 Dimension ................................................................................................................................................................................ 8
3.2.2 Pin Definition ........................................................................................................................................................................... 8
4. Recommended Circuit Diagram ...................................................................................................... 9
5. Function Description ............................................................................................................................ 9
5.1 Reset .............................................................................................................................................................................. 9
5.2.2 Indication of Wireless Transmitting .............................................................................................................................. 10
5.2.4 Notes for AUX ...................................................................................................................................................................... 10
6.1 Mode Switch .............................................................................................................................................................. 11
6.3 Reserve Mode（Mode 1） .................................................................................................................................... 12
6.5 Sleep Mode (Mode 3) ............................................................................................................................................. 12
7.1 Default Parameter .................................................................................................................................................... 13
7.3 Reading Version Number ....................................................................................................................................... 13
7.5 Parameter Setting Instruction ............................................................................................................................... 14
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 4 / 18
9. Production Guidance ......................................................................................................................... 16
9.1 Reflow Soldering Temperature ............................................................................................................................ 16
9.2 Reflow Soldering Curve .......................................................................................................................................... 17
10. FAQ .......................................................................................................................................................... 17
10.1 Communication range is too short ................................................................................................................... 17
10.2 Module is easy to damage .................................................................................................................................. 17
11. Important Notes ................................................................................................................................ 18
12. About Us ............................................................................................................................................... 18
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 5 / 18
1. Features
l Continuous transmission: At continuous transmission, the length of the data transmitted is unlimited, which enables continuous
transmission at baud rate of 57600/38400/19200/9600/4800/2400/1200.
l Fixed-length transmission: Air data rate, FEC, password etc. are configurable for users. Users transmit data to other modules
with configured air data rate in the most efficient way, which achieves low-latency and high-response.
l User password: 65536 configurable addresses are reserved for users to define, which makes the module with matched password
receive the data.
l High speed transmission: 433M features high speed and low latency. It is suitable for polling sampling, handshake response
communication, and supports Modbus protocols.
l Broadcast transmission: When the module address is set as 0xFFFF, the module can communicate with other modules in the
same channel. That enables broadcast and monitor.
l FEC: Forward Error Correction has high coding efficiency & good correction performance. In case of sudden interference, it can
correct the interfered data packets proactively, so that the reliability & transmission range are improved correspondingly. Without
FEC, those data packets can only be dropped.
l Sleep mode: When the module works in sleep mode (Mode 3), it is available for configuration, but not for transmitting & receiving.
The typical current is few uA in this mode. It can still receive the configuration from the MCU.
l Watchdog: With a built-in watchdog, the module runs precise layout and time. Once an exception occurs, the module will restart
in 0.107 second, and continue to work according to the previous parameters.
Model
IC
Size
Net weight
Operating
temperature
Operating
humidity
Storage
temperature
E61-TTL-50
RF
21*36 mm
6.7±0.1g
-40 ~ 85℃
10% ~ 90%
-40 ~ 125°C
E61-TTL-1W
RF
24*43 mm
8.5±0.1g
-40 ~ 85℃
10% ~ 90%
-40 ~ 125°C
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 6 / 18
2.1 Electrical Parameters
2.1.1 E61-TTL-50
Parameter
Min
Typ
Max
Unit
Trans mi tt in g curre nt
66
70
77
mA
Receiving current
18
19
21
mA
Turn -off current
3 4 5
μA
Trans mi tt in g powe r
29
30
31
dBm
Receiving sensitivity
-124
-126
-128
dBm
Recommended frequency
425
433
450.5
MHz
Voltag e s upp ly
2.3
3.3
5.2
V
Communication level
2.5
3.3
3.6
V
2.1.2 E61-TTL-1W
Parameter
Min
Typ
Max
Unit
Trans mi tt in g curre nt
445
480
530
mA
Receiving current
18
19
21
mA
Turn -off current
4 5 6
μA
Trans mi tt in g powe r
29
30
31
dBm
Receiving sensitivity
-124
-126
-128
dBm
Recommended frequency
425
433
450.5
MHz
Voltag e s upp ly
3.3
5.0
5.2
V
Communication level
2.5
3.3
3.6
V
2.3 Parameters Notes
l When designing current supply circuit, 30% margin is recommended to be remained so as to ensure long-term stable operation of
the whole module.
l The current at the instant of transmitting may be high, but the total energy consumed may be lower due to very short transmitting
time.
l When using external antenna, the impedance matching degree at different frequency points between antenna and module may
affect the transmitting current at different levels.
l The current consumed when the RF chip is only working at receiving mode is called as receiving current. The tested receiving current
may be higher for some RF chips with communication protocol or when the developers have loaded their own protocol to the whole
module.
l The current at pure receiving mode is at mA level. To achieve µA level receiving current, the users need to manage it through
firmware development.
l The turn-off current is always lower than the current consumed when the power supply source of the whole module is at no-load
status.
l Each LRC component has ±0.1% error, and the error will accumulate since multiple LRC components are used in the whole RF circuit,
by lowering transmitting power due to various reasons.
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 7 / 18
3. Mechanical Characteristics
3.1 E61-TTL-50
3.1.1 Dimension
3.1.2 Pin Definition
Pin No.
Pin item
Pin direction
Pin application
1
M0
Input
（weak pull-up）
Work with M1 & decide the four operating modes.
Floating is not allowed, can be ground.
2
M1
Input
（weak pull-up）
Work with M0 & decide the four operating modes.
Floating is not allowed, can be ground.
3
RXD
Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be
configured as open-drain or pull-up input.
4
TXD
Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be
configured as open-drain or push-pull output.
5
AUX
Output
To in di ca te mo du l e’s working status & wakes up the external MCU. During
the procedure of self-check initialization, the pin outputs low level. Can be
configured as open-drain output or push-pull output. (Floating is allowed).
6
VCC
Input
Power supply 2.1V-5.5V DC.
7
GND
Input
Ground electrode
8
Fixing hole
Fixing hole
9
Fixing hole
Fixing hole
10
Fixing hole
Fixing hole
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 8 / 18
3.2 E61-TTL-1W
3.2.1 Dimension
3.2.2 Pin Definition
Pin No.
Pin item
Pin direction
Pin application
1
M0
Input
（weak pull-up）
Work with M1 & decide the four operating modes.
Floating is not allowed, can be ground.
2
M1
Input
（weak pull-up）
Work with M0 & decide the four operating modes.
Floating is not allowed, can be ground.
3
RXD
Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be
configured as open-drain or pull-up input.
4
TXD
Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be
configured as open-drain or push-pull output.
5
AUX
Output
To in di ca te mo du l e’s working status & wakes up the external MCU. During
the procedure of self-check initialization, the pin outputs low level. Can be
configured as open-drain output or push-pull output. (Floating is allowed).
6
VCC
Input
Power supply 2.8V-5.5V DC.
7
GND
Input
Ground electrode
8
Fixing hole
Fixing hole
9
Fixing hole
Fixing hole
10
Fixing hole
Fixing hole
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 9 / 18
4. Recommended Circuit Diagram
No.
Description（STM8L MCU）
1
The UART module is TTL level. Please connect to MCU of 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 Reset
When the module is powered, AUX outputs low level immediately, conducts hardware self-check and sets the operating mode on the basis
of the user parameters. During the process, the AUX keeps 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, the user needs to wait the AUX rising edge as the starting point
of module’s normal work.
5.2 AUX Description
5.2.1 Indication of UART Output
To w ak e u p ex te rn al M CU :
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 10 / 18
5.2.2 Indication of Wireless Transmitting
Buffer (empty): the internal 256 bytes data in the buffer are written to the RFIC (Auto sub package). When AUX=1, the user can input data
less than 256 bytes continuously without overflow.
Buffer (not empty): when AUX=0, the internal 256 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.
Notes: 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.
5.2.3 Configuration Procedure of Module
Only happened when power-on resetting or exiting sleep mode.
5.2.4 Notes for AUX
l 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.
l 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.
l After switching to new operating mode, it won’t be work in the new mode immediately until AUX rising edge 2ms later. If AUX is
parameters, during which AUX outputs low level.
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 11 / 18
6. Operating Mode
Contents in the table below are the introduction of input status of M1 & M0 and their corresponding mode:
Mode（0-3）
M1
M0
Mode introduction
Remark
Mode 0
Transmission
0
0
UART and wireless channel are open, transparent
transmission is on
Working with the software, the
module can be configured as
continuous transmission(Default)
and fix-length transmission.
Mode 1
Reserve
1 0 N/A
Mode 2
Instruction
0
1
UART opens and wireless channel closes. Module can accept
UART configuration instruction.
To c ha ng e th e c on fi gu ra t io n.
Mode 3
Sleep
1 1 UART and module are closed.
6.1 Mode Switch
l The user can decide the operating mode by the combination of M0, M1 and M2. The two GPIOs of MCU can be used to switch
mode. After modifying M0, M1 or M2, it will start to work in new mode 1ms later if the module is free. If there are any serial data
that are yet to finish wireless transmitting, it will start to work in new mode after the UART transmitting finished. After the module
receives the wireless data & transmits the data through serial port, it will start to work in new mode after the transmitting finished.
Therefore, the mode-switch is only valid when AUX outputs 1, otherwise it will delay.
l For example, in mode 2 or mode 4, if the user inputs massive data consecutively and switches operating mode at the same time,
the mode-switch operation is invalid. New mode checking can only be started after all the user’s data process completed. It is
recommended to check AUX pin out status and wait 2ms after AUX outputs high level before switching the mode.
l If the module switches from other modes to stand-by mode, it will work in stand-by mode only after all the remained data process
completed. The feature can be used to save power consumption. For example, when the transmitter works in mode 0, after the
external MCU transmits data “12345”, it can switch to sleep mode immediately without waiting the rising edge of the AUX pin,
also the user’s main MCU will go dormancy immediately. Then the module will transmit all the data through wireless transmission
& go dormancy 1ms later automatically, which reduces MCU working time & save power.
l Likewise, this feature can be used in any mode-switch. The module will start to work in new mode within 1ms after completing
present mode task, which enables the user to omit the procedure of AUX inquiry and switch mode swiftly. For example, when
l This operation is very flexible and efficient. It is totally designed on the basis of the user MCU’s convenience, at the same time the
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 12 / 18
6.2 Transmission Mode（Mode 0）
Status
When M1 = 0 & M0 = 0, module works in mode 0
Continuous
transmission
Tran sm it ti ng
Air data rate will automatically match with configured baud rate(≤57600), which enables user to
input data continuously, and module transmits data immediately once it receives user data.
Unlimited package length for continuous transmission.
Tran sm is si on is a va il able when baud rate set as 115200, but not continuous transmission.
So baud rate 115200 is not recommended for user when module works in continuous transmission.
AUX is the indication for module’s working status, when module receives the first byte of user data,
AUX output low level (busy for transmitting).
After the module transmit all the data into RF chip & start transmission, AUX outputs high level.
Receiving
After module receives data form transmitter, AUX outputs low level (busy for receiving), and starts
to transmit data package from TXD after 5ms delay.
After module transmits all the data from TXD, AUX outputs high level.
UART baud rate must keep the same for both transmitter and receiver. When module receives data
from transmitter, TXD can transmit data continuously without interspace between bytes.
Serial transmission is suitable for low-latency occasion like Modbus.
Fixed-length
transmission
Tran sm it ti ng
UART baud rate, air data rate, address, FEC, password etc. are configurable for user, and the maximum
packet length is 77 bytes.
The principle module follows: all the data transmit from transmitter to receiver with the shortest time
under the current air data rate.
When the data package received by RXD is up to or more than 77 bytes, module starts to transmit
data (data package is 77 bytes). The data more than 77-byte will be transmitted in the next package.
When the required transmission bytes are less than 77 byte, module will wait 3-byte time and treat
it as data termination unless continuous data inputted by user. Then module will transmit all the data
through wireless channel.
For example: if the required transmission byte is 1 byte, module will transmit the 1-byte package
after wait 3-byte time. AUX is the indication for module’s working status, when module receives
the first byte of user data, AUX output low level (busy for transmitting).
After the module transmit all the data into RF chip & start transmission, AUX outputs high level.
Due to the 256 bytes buffer for transmission, so it is required that the data inputted by user is less
than 256-byte one time. Next package can be inputted after AUX turns low level to high level.
Receiving
After module receives data form transmitter, AUX outputs low level (busy for receiving), and starts
to transmit data package from TXD after 5ms delay.
After module transmits all the data from TXD, AUX outputs high level.
6.3 Reserve Mode（Mode 1）
Status
When M1 = 0 & M0 = 1, module works in mode 1.
Remarks
UART and wireless channel are disabled.
6.4 Instruction Mode（Mode 2）
Status
When M1 = 1 & M0 = 0, module works in mode 2.
Tran sm it ti ng
N/A
Receiving
N/A
Remarks
In this mode, UART baud rate is fixed as 9600 8N1, module can receive command for parameter-setting.
6.5 Sleep Mode (Mode 3)
Status
When M1=1,M0=1,module works in mode 3.
Tran sm it ti ng
N/A
Receiving
N/A
Notes
The wireless receiver is closed and the MCU is in a sleep state, when the power consumption of the whole machine is about 4 uA.
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Wireles s UART Module User Manual of E61 Series Modules
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7. Instruction Format
In command mode（Mode 2：M1=1, M0=0）, it supports instructions below.
(Only support 9600 and 8N1 format when setting)
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 send 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 send in succession.
3
C2 + working parameters
C2 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and must
be send 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 send in succession.
5
C4 C4 C4
Three C4 are sent in hexadecimal format. The module will reset one time and they must be
send in succession.
7.1 Default Parameter
Default parameter values：C0 00 00 18 50 50
Model
Frequency
Address
Channel
Transmitting
methods
Baud rate
Parity
Transmitting
power
E61-TTL-50
433MHz
0x0000
0x50
Continuous
transmitting
9600
8N1
50mW
Default parameter values：C0 00 00 18 50 50
Model
Frequency
Address
Channel
Transmitting
methods
Baud rate
Parity
Transmitting
power
E61-TTL-1W
433MHz
0x0000
0x50
Continuous
transmitting
9600
8N1
1W
7.2 Reading Operating Parameters
Instruction format
Description
C1+C1+C1
In instruction mode（M0=0，M1=1），
User gives the module instruction (HEX format): C1 C1 C1,
Module returns the present configuration parameters.
For example, C0 00 00 18 50 50.
7.3 Reading Version Number
Instruction format
Description
C3+C3+C3
In instruction mode（M0=0，M1=1）,
User gives the module instruction (HEX format): C3 C3 C3.
Module returns its present version number, for example C3 61 xx yy.
61 here means the module model (E61 series); xx is the version number and yy refers to the other module features.
7.4 Reset Instruction
Instruction format
Description
C4+C4+C4
In instruction mode（M0=0，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.
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Wireles s UART Module User Manual of E61 Series Modules
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7.5 Parameter Setting Instruction
No.
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 Module address jointly determined by ADDH and ADDL,
constitute a 16bit number.
Only the module with same addresses can communicate with each other.
When ADDH=FFH, ADDL=FFH, broadcast and monitor are available:
1. Module can transmit data to other modules with different
addresses when works as transmitter.
2. Module can monitor data package from other modules with
different addresses when works as receiver.
2
ADDL
Low address byte of module
（the default 00H）
00H-FFH
3
SPED
Rate parameter，including UART baud
rate and air data rate
7，6 UART parity bit
00：8N1（Default）
01：8O1
10：8E1
11：8N1（Equal to 00）
------------------------------------------
5，4，3 TTL UART baud rate（bps）
000：1200bps
001：2400bps
010：4800bps
011：9600bps（Default）
100：19200bps
101：38400bps
110：57600bps
111：115200bps
------------------------------------------
2，1，0 Air date rate（bps）
000：1.2Kbps
001：2.4Kbps
010：4.8Kbps
011：9.6Kbps
100：19.2Kbps
101：38.4Kbps
110：50Kbps
111：70Kbps
l UART mode can be different between communication parties
------------------------------------------------------------------
l UART baud rate can be different between communication parties.
The higher UART baud rate, the shorter communication distance.
l UART baud rate can be different between both two parties when
module works in fixed-length transmission. The UART baud rate
has nothing to do with wireless transmission parameters & won’t
affect the wireless transmit / receive features.
-----------------------------------------------------------------
l Air data rate setting is invalid when the module works at serial
transmission mode. Module will match with it automatically on the
basis of UART baud rate.
l The air date rate must keep the same for both communication
parties work in fixed transmission mode. The lower the air date
rate, the longer the transmitting distance, better anti-interference
performance and longer transmitting time
4
CHAN
Communication frequency（425M +
CHAN * 0.1M (default 50H : 433MHz）
l 00H-FFH, for 425-450.5MHz.
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Wireles s UART Module User Manual of E61 Series Modules
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5
OPTION
7， FEC switch
0：Turn off FEC（Default）
1：Turn on FEC
------------------------------------------
6 IO drive mode (Default 1)
1：TXD and 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（for the
receiver, it means the monitor interval
time ,while for the transmitter it means
continuously sending preamble code
time.） 000：Fixed-length transmission
001：Reserved, equal to mode 0
010：Serial transmission
011：Reserved, equal to mode 0
100：Reserved, equal to mode 0
101：Reserved, equal to mode 0
110：Reserved, equal to mode 0
111：Reserved, equal to mode 0
-----------------------------------------
2， Whether to enable cipher
1：Enable
1：Not enable（Default）
-----------------------------------------
1, 0 transmission power (approximation)
00： 17dBm（Default）
01： 14dBm
10： 10dBm
11： 7dBm
-----------------------------------------
1, 0 transmission power (approximation)
00： 30dBm（Default）
01： 27dBm
10： 24dBm
11： 21dBm
l When FEC turns on, the data transmitting time will be extended
while greatly improved the probability of successful sending and
receiving data. User can enable this function if your application
does not need low-latency transaction.
------------------------------------------------------------------
l 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 4-10KΩ pull-up resistor.
-----------------------------------------------------------------
l For more details, please refer to other chapters.
-----------------------------------------------------------------
l For users to define.
l Both communication parties must keep on the same pages
about this function.
-----------------------------------------------------------------
l For E61-TTL-50
l The external power must make sure the ability of current
output more than 299mA and ensure the power supply ripple
within 100mV.
l Low power transmission is not recommended due to its low
power supply efficiency.
-----------------------------------------------------------------
l For E61-TTL-1W
l The external power must make sure the ability of current
output more than 1A and ensure the power supply ripple
within 100mV.
l Low power transmission is not recommended due to its low
power supply efficiency.
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(user configures)
0 0 0 1 1 0 1
0
Meaning
UART parity bit
8N1
UART baud rate is 9600
Air date rate is 1.2k
Corresponding hexadecimal 1 8
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Wireles s UART Module User Manual of E61 Series Modules
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8. Parameter Setting
When the module is in Mode 2 (M0=1 M1=0), the parameter can be set by instruction or software in PC.
Please visit www.cdebyte.com to download the software.
9. Production Guidance
9.1 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
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 17 / 18
9.2 Reflow Soldering Curve
10. FAQ
10.1 Communication range is too short
l The communication distance will be affected when obstacle exists.
l Data lose rate will be affected by temperature, humidity and co-channel interference.
l The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.
l Seawater has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.
l The signal will be affected when the antenna is near metal object or put in a metal case.
l Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the distance).
l The power supply low voltage under room temperature is lower than the recommended value, the lower the voltage, the lower the
transmitting power.
l Due to antenna quality or poor matching between antenna and module.
10.2 Module is easy to damage
l Please check the power supply source, ensure it is within the recommended value, voltage higher than that will damage the module.
l Please check the stability of power source, the voltage cannot fluctuate too much.
l Please make sure antistatic measure are taken when installing and using, high frequency devices have electrostatic susceptibility.
l Please ensure the humidity is within limited range, some parts are sensitive to humidity.
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Wireles s UART Module User Manual of E61 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 18 / 18
11. Important Notes
l All rights to interpret and modify this manual belong to Ebyte.
l This manual will be updated based on the upgrade of firmware and hardware, please refer to the latest version.
l Please refer to our website for new product information
12. About Us
Te ch ni ca l su p po rt : support@cdebyte.com
Documents and RF Setting download link: www.cdebyte.com/en/
Te l：+86-28-61399028 Ext. 812
Fax：028-64146160
Web：www.cdebyte.com/en/
Address：Innovation Center D347, 4# XI-XIN Road,Chengdu, Sichuan, China
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