Ebyte E34-2G4D20D User manual

E34-2G4D20D User Manual
nRF24L01+ 2.4GHz TTL Full Duplex Wireless Module

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd. 1
Contents
1. Overview.............................................................................................................................................................................1
1.1 Introduction...............................................................................................................................................................1
1.2 Features.....................................................................................................................................................................1
1.3 Application................................................................................................................................................................2
2. Specification and parameter............................................................................................................................................... 2
2.1 Limit parameter........................................................................................................................................................ 2
2.2 Operating parameter................................................................................................................................................. 2
3. Size and pin definition........................................................................................................................................................ 3
4. Recommended wiring diagram...........................................................................................................................................4
5. Functional Details...............................................................................................................................................................5
5.1 Module Reset............................................................................................................................................................ 5
5.2 AUX description....................................................................................................................................................... 5
5.2.1. Indication of UART output........................................................................................................................... 5
5.2.2. Indication of wireless transmitting............................................................................................................... 5
5.2.3.Configuration procedure of module...............................................................................................................6
5.2.4. Notes for AUX..............................................................................................................................................6
6. Operating mode.................................................................................................................................................................. 6
6.1 Mode switching........................................................................................................................................................ 7
6.2 Half-Duplex (Mode 0).............................................................................................................................................. 7
6.3 Full-Duplex (Mode 1)...............................................................................................................................................7
6.4 Reservation Mode (Mode 2).....................................................................................................................................8
6.5 Setting mode (Mode 3）.......................................................................................................................................... 8
6.6 Quick communication test........................................................................................................................................ 8
7. Instruction format............................................................................................................................................................... 9
7.1 Default parameter..................................................................................................................................................... 9
7.2 Reading operating parameters.................................................................................................................................. 9
7.3 Reading version number........................................................................................................................................... 9
7.4 Reset instruction..................................................................................................................................................... 10
7.5 Parameter setting instruction .............................................................................................................................. 10
8. Hardware Design.............................................................................................................................................................. 11
9. FAQ...................................................................................................................................................................................12
9.1 Communication range is too short..........................................................................................................................12
9.2 Module is easy to damage...................................................................................................................................... 12
9.3 High bit error rate................................................................................................................................................... 12
10. Welding operation guidance........................................................................................................................................... 13
11. Related Model.................................................................................................................................................................13
12. Antenna Type.................................................................................................................................................................. 13
13. Batch packaging............................................................................................................................................................. 14
Revision history....................................................................................................................................................................14
About us................................................................................................................................................................................14

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
1
1. Overview
1.1 Introduction
E34-2G4D20D is based on nRF24l01+, working at 2.4～2.518GHz,
TTL output.It’s compatible with 3.3V and 5V IO port voltage, using serial
port for data transmission and reception, reducing the threshold of wireless
applications.
The E34-2G4D20D is characterized by high-speed transmission. It can
achieve full-duplex (two-way simultaneous transmission and reception)
under various baud rates. It is not limited to packet length, supports uninterrupted transmission, and supports file
transmission.
The module has data encryption and compression capabilities. The data transmitted by the module in the air is
random, and the data interception loses its meaning through strict encryption and decryption algorithms. The data
compression function has the probability of reducing the transmission time, reducing the probability of interference,
improving reliability and transmission efficiency.
1.2 Features
Supports full-duplex performance at up to 57600 baud rate (two-way simultaneous transmission and reception)；
Supports uninterrupted transmission, unlimited packet length；
Support file transfer；
Maximum transmission power 100mW, multi level adjustable through software；
Support for the global license-free ISM 2.4GHz band;
Air rate automatically adapts to baud rate;
Support advanced GFSK modulation;
Support low power mode for battery applications;
Support 2.3 ~ 5.5V power supply, greater than 3.3V power supply can guarantee the best performance;
Industrial grade standard design, support -40 ~ 85 °C for working over a long time；
SMA-K interface for easy connection to coaxial cable or external antenna.

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
2
1.3 Application
Wearable device；
Smart homes, industrial sensors, etc.；
Security system, positioning system；
Wireless remote control, drone；
Wireless game remote control；
Health care products；
Wireless voice, wireless headset；
Automotive industry applications.
2. Specification and parameter
2.1 Limit parameter
Main parameter
Performance
Remark
Min.
Max.
Power supply (V)
0
5.5
Voltage over 5.5V 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
Industrial grade
2.2 Operating parameter
Main parameter
Performance
Remark
Min.
Typ.
Max.
Operating voltage (V)
2.3
5.0
5.5
It’s recommended to use 5.0V
Communication level (V)
3.3
For 5V TTL, it may be at risk of burning down
Operating temperature (℃)
-40
-
85
Industrial design
Operating frequency (GHz)
2400
-
2518
Support ISM band
Power
consumption
TX current (mA)
110
Instant power consumption
RX current (mA)
21.5
Sleep current (μA)
24.8
Software is shut down
Max Tx power (dBm)
19.5
20.0
21.4
Receiving sensitivity (dBm)
-101
-102
-103
Air data rate is 0.3kbps
Air data rate (bps)
-
Not adjustable
-
Automatic software optimization, automatic
adaptation to baud rate

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
3
Main parameter
Description
Remark
Distance for reference
2000m
Test condition：clear and open area, antenna gain: 5dBi，antenna
height: 2.5m，baud rate 9600
FIFO
29Byte
Maximum length of single transmission
Buffer Size
1024 Btye
Unlimited length
Modulation
GFSK
Package
DIP
Connector
2.54mm
Communication interface
UART
TTL
Size
21*36mm
Antenna
SMA-K
50 ohm impedance
3. Size and pin definition

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
4
No.
Name
Direction
Function
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 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 open-drain output or push-pull output (floating is allowed).
6
VCC
Power supply 2.3V~5.5V DC
7
GND
Input
Ground
8
Fixing hole
Input
Fixing hole
9
Fixing hole
Fixing hole
10
Fixing hole
Fixing hole
4. Recommended wiring diagram
No.
Description（STM8L MCU）
1
The UART module is TTL level, please connect with the 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.

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
5
5. Functional Details
5.1 Module 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
AUX Pin can be used as indication for wireless send & receive buffer and self-check.
It can indicate whether there are data that are yet to send 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.
5.2.1. Indication of UART output
It’s used to wake up external MCU.
5.2.2. Indication of wireless transmitting
Buffer (empty): the internal 1024 bytes data in the buffer are written to the RFIC (Auto subpackage). When AUX=1, the user can input
data less than 1024 bytes continuously without overflow.
Buffer (not empty): when AUX=0, the internal 1024 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
subpackage.
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.

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
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5.2.3.Configuration procedure of module
Only happened when power-on resetting or exiting sleep mode.
5.2.4. Notes for AUX
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.
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.
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 on the high level, the operating mode switch can be effected immediately.
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
The module has 4 operation mode, which decided by the status of M1 & M0. Below are the details:
Mode（0-3）
M0
M1
Description
Remark
Mode 0
Half-Duplex
0
0
UART and wireless channel are open,
transparent transmission is on ，half- duplex
operation
The receiver must work at same address,
channel and same baud rate.
Mode 1
Full-Duplex
1
0
UART and wireless channel are open,
transparent transmission is on ，full- duplex
operation
The receiver must work at same address,
channel and same baud rate.
Mode 2
Reservation Mode
0
1
Reservation Mode
The same as that in mode 0.
Mode 3
Setting Mode
1
1
Parameter setting

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6.1 Mode switching
The user can decide the operating mode by the combination of M1 and M0. The two GPIO of MCU can be used to switch mode.
After modifying M1 or M0, it will start to work in new mode 1 ms 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.
For example, in mode 0 or mode 1, 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 pinout status and wait 2ms after AUX outputs high level before switching the mode.
6.2 Half-Duplex (Mode 0)
When M1 = 0 & M0 = 0, module works in mode 0
Transmitting
The module can receive the user data via serial port, and transmit wireless data package of 29 bytes. When the
data inputted by user is up to 29 bytes, the module will start wireless transmission. During which the user can
input data continuously for transmission. When the required transmission bytes are less than 29 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 is
started, 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 1024 bytes continuously. The data package transmitted from the module
working in mode 0 can only be received by the module working in mode 0 or 1 or mode 2
Receiving
The wireless receiving function of the module is on, the data packet transmitted from the module working in mode
1 & mode 2 can be received.After receiving the data packet, the AUX outputs low level, 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.
Note
Module cannot receive data in the process of transmitting.
Also, module cannot transmit data in the process of receiving.
6.3 Full-Duplex (Mode 1)
When M1 = 0 & M0 = 1, module works in mode 1.
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.
Note
Module can receive data in the process of transmission.
Also, module can transmit data in the process of receiving.

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
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6.4 Reservation Mode (Mode 2)
When M1 = 1 & M0 = 0, module works in mode 2.
Transmitting
The same as that in mode 0
Receiving
The same as that in mode 0
6.5 Setting mode (Mode 3）
When M1=1, M0=1, module works in mode 3
Transmitting
N/A
Receiving
N/A
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. (pls refer to
parameters setting for details)
Notes
When the mode changes from setting mode to others, the module will reset its parameters, during which the AUX
keeps low level and then outputs high level after reset completed.
It is recommended to check the AUX rising edge for user.
6.6 Quick communication test
Steps
Operation
1
Plug the USB test board (E15-USB-T2) into computer, make sure the driver is installed correctly.
Plug mode-select jumper in the USB test board (M1 = 0，M0 = 0), make the module work in mode 0.
2
Optional power supply, 3.3V or 5V. (Module supports 2.3V-5.5V)
3
Operate AccessPort software and select the correct serial port code.

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
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7. Instruction format
In setting mode（mode 3：M1=1, M0=1）, it supports below instructions on list.
(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. ( 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
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 00 40
Model
Frequency
Address
Channel
Air data rate
Baud rate
Parity
Transmitting power
E34-2G4D20D
2.4GHz
0x0000
0x00
-
9600
8N1
100mW
7.2 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 18 00 40.
7.3 Reading version number
Instruction format
Description
C3+C3+C3
In setting mode（M0=1，M1=1）,
User gives the module instruction (HEX format): C3 C3 C3,
Module returns its present version number, for example C3 39 xx yy.
39 here means the module model (E39 series); xx is the version number and yy refers to the other
module features.

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7.4 Reset instruction
Instruction format
Description
C4+C4+C4
In setting 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.
7.5 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-off
C2: Do not save the parameters when
power-off
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
8E1
1
1
8N1（equal to 00）
5
4
3
TTL Serial port rate（bps）
UART baud rate 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
Serial port baud rate 1200
0
0
1
Serial port baud rate 2400
0
1
0
Serial port baud rate 4800
0
1
1
Serial port baud rate 9600（Default）
1
0
0
Serial port baud rate 19200
1
0
1
Serial port baud rate 38400
1
1
0
Serial port baud rate 57600
1
1
1
Serial port baud rate 115200
2
1
0
Reserved
0 (recommended)
4
CHAN
General model
7、6、5、4 reserved
0 (recommended)
communication channel
00H-1FH,16 channels in total;
Corresponds to 2400MHz+CHAN * 7MHz
3、2、1、0 ,default00H（2400MHz）
5
OPTIO
N
7
Reserved
0(recommended)
6
IO Drive mode（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 output，RXD pull up input
0
TXD、AUX open output，RXD open input
5
4
3
reserved
0(recommended)
2
reserved
0(recommended)

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1
0
Transmitting power(Approximate value)
The external power must make sure the
ability of current output more than 200mA
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
(user configures)
0
0
0
1
1
0
0
0
Meaning
UART parity bit 8N1
UART baud rate is 9600
Air rate adaptation
Corresponding hexadecimal
1
8
8. Hardware Design
It is recommended to use 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. If the reverse
connection is connected, the module may be permanently damaged.
Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum,
the module will be permanently damaged.
Please check the stability of the power supply, the voltage can not be significantly frequent.
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the
margin, and 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 traces, high-frequency analog traces, and power traces 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(All copper-covered and well grounded), and must be close to
the digital part of the module and routed in the Bottom Layer.
Assuming the module is soldered or placed in the Top Layer, it is also wrong to randomly route the Bottom Layer or
other layers, which will affect the module's spurs and receiving sensitivity to varying degrees.
Assuming that there are devices with large electromagnetic interference around the module, the performance of the
module will also be greatly affected. According to the intensity of the interference, it is suggested to stay away from
the module appropriately. If circumstances permit, appropriate isolation and shielding can be done.
Assume that there are traces with large electromagnetic interference around the module (high-frequency digital,
high-frequency analog, power trace), which 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 and also have a 2.4GHz TTL protocol, for example: USB3.0
The antenna must not be installed inside the metal case, which will greatly reduce the transmission distance.

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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).
When the power supply at room temperature is lower than the recommended low voltage, the lower the voltage is,
the lower the transmitting power is.
Due to antenna quality or poor matching between antenna and module.
9.2 Module is easy to damage
Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will
lead to a permanent damage to the module.
Please check the stability of power supply and ensure the voltage not to fluctuate too much.
Please make sure anti-static measures are taken when installing and using, high frequency devices have electrostatic
susceptibility.
Please ensure the humidity is within limited range for some parts are sensitive to humidity.
Please avoid using modules under too high or too low temperature.
9.3 High bit error rate
There are co-channel signal interference nearby, keep away from interference sources or modify frequency, channel
to avoid interference.
Unsatisfactory power supply may also cause garbled characters, and ensure the reliability of the power supply.
If the extension cable or feeder is of poor quality or too long, the bit error rate will be high.

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
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10.Welding operation guidance
This product is a DIP type module. When welding the module, the welding personnel must work in accordance with the
static discharge operation specifications;
This product is a static-sensitive product. The module may be permanently damaged if it is not welded according to the
rules.
11.Related Model
Model
Chip
Frequency
Hz
Transmit
power
dBm
Test
distance
km
Air data
rate Bps
Packaging
Size
mm
Communication
Interface
E34-2G4D20D
nRF24L01+
2.4G
20
2.0
250k～2M
DIP
21 * 36
Full duplex，file transfer
E34-2G4H20D
nRF24L01+
2.4G
20
2.5
250k～2M
DIP
21 * 36
frequency
hopping,anti-interference
E34-2G4H27D
nRF24L01+
2.4G
27
5.0
250k～2M
DIP
21 * 36
frequency
hopping,anti-interference
12.Antenna Type
The antenna plays an important role in the communication process. The inferior antenna often has a great impact on the
communication system. Therefore, we recommend some antennas that support our wireless modules and have excellent
performance and reasonable price.
Product
Type
Frequency
Gain
Size
Feeder
Interference
Features
Hz
dBi
mm
cm
TX2400-NP-5010
Soft antenna
2.4G
2.0
10x50
-
IPEX
Flexible FPC Soft Antenna
TX2400-JZ-3
Rubber
antenna
2.4G
2.0
30
-
SMA-J
Ultrashort Straight, Omnidirectional
Antenna
TX2400-JZ-5
Rubber
antenna
2.4G
2.0
50
-
SMA-J
Ultrashort Straight, Omnidirectional
Antenna
TX2400-JW-5
Rubber
antenna
2.4G
2.0
50
-
SMA-J
Flexible omnidirectional Antenna
TX2400-JK-11
Rubber
antenna
2.4G
2.5
110
-
SMA-J
Flexible rubber omnidirectional
Antenna
TX2400-JK-20
Rubber
antenna
2.4G
3.0
200
-
SMA-J
Flexible rubber omnidirectional
Antenna
TX2400-XPL-150
Sucker
antenna
2.4G
3.5
150
150
SMA-J
Sucker antenna with magnetic base

Chengdu Ebyte Electronic Technology Co., Ltd. E34-2G4D20D User manual
Copyright ©2012–2018, Chengdu Ebyte Electronic Technology Co.,Ltd.
14
13.Batch packaging
Revision history
Version
Date
Description
Issued by
v1.0
2018-01-08
Original version
huaa
v5.0
2018-07-20
Content added
Huaa
v6.0
2018-10-24
Model No. split
Huaa
V6.1
2019-3-19
Content added
Ray
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