Ebyte E51 Series User manual

AX5043 Wireless Module
E51 Series
This manual may be modified based on product upgrade, please refer to the latest version.
All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co., Ltd.
User Manual

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 2 / 21
Version
Date
Description
Issued by
1.00
2017/12/13
Initial version
huaa
Brief Introduction
E51 series wireless transceiver modules, operate at 225~237.6MHz (Default: 230MHz) with transparent transmission available, TTL
level, WOR (ultra-low power consumption). They feature half duplex and DIP interface.
The module has the function of data encryption & compression. The data of the module transmitted over the air features
randomness. With the rigorous encryption & decryption, data interception becomes pointless. The function of data compression decreases
the transmission time & probability of being interfered, while improving the reliability & transmission efficiency.
E51 series strictly stick to the design rules home and abroad of FCC, CE, CCC and meet the related RF certifications and export
standards.
Model
Frequency
Transmitting power
Distance
Packing
Antenna
E51-TTL-50
230M
17dBm
2000m
DIP
SMA-K
E51-TTL-500
230M
27dBm
4000m
DIP
SMA-K
E51-TTL-2W
230M
33dBm
8000m
DIP
SMA-K

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 3 / 21
Contents
1. Features ..................................................................................................................................................... 5
2. Technical Parameters ........................................................................................................................... 5
2.1 Electrical Parameters ................................................................................................................................................. 6
2.1.1 Transmitting Current ............................................................................................................................................................ 6
2.1.2 Receiving Current .................................................................................................................................................................. 6
2.1.3 Turn-off Current .................................................................................................................................................................... 6
2.1.4 Voltage Supply ....................................................................................................................................................................... 6
2.1.5 Communication Level ........................................................................................................................................................... 7
2.2 RF Parameters ............................................................................................................................................................. 7
2.2.1 Transmitting Power ............................................................................................................................................................... 7
2.2.2 Receiving Sensitivity .............................................................................................................................................................. 7
2.2.3 Recommended Working Frequency ................................................................................................................................ 7
2.3 Tested Parameters ..................................................................................................................................................... 8
2.3.1 Tested Distance ...................................................................................................................................................................... 8
3. Mechanical Characteristics ................................................................................................................ 8
3.1 E51-TTL-50 .................................................................................................................................................................. 8
3.1.1 Dimension ................................................................................................................................................................................ 8
3.1.2 Pin Definition ........................................................................................................................................................................... 9
3.2 E51-TTL-500 ................................................................................................................................................................ 9
3.2.1 Dimension ................................................................................................................................................................................ 9
3.2.2 Pin Definition ........................................................................................................................................................................ 10
3.3 E51-TTL-2W .............................................................................................................................................................. 10
3.3.1 Dimension ............................................................................................................................................................................. 10
3.3.2 Pin Definition ........................................................................................................................................................................ 11
4. Recommended Circuit Diagram .................................................................................................... 11
5. Function Description .......................................................................................................................... 12
5.1 Fixed Transmission .................................................................................................................................................. 12
5.2 Broadcast Transmission .......................................................................................................................................... 12
5.3 Broadcast Address ................................................................................................................................................... 12
5.4 Monitor Address ...................................................................................................................................................... 12
5.5 Reset ............................................................................................................................................................................ 13
5.6 AUX Description ....................................................................................................................................................... 13
5.6.1 Indication of UART Output .............................................................................................................................................. 13
5.6.2 Indication of Wireless Transmitting .............................................................................................................................. 13
5.6.3 Configuration Procedure of Module ............................................................................................................................ 13
5.6.4 Notes for AUX ...................................................................................................................................................................... 14
6. Operating Mode ................................................................................................................................... 14
6.1 Mode Switch ............................................................................................................................................................. 14

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 4 / 21
6.2 Normal Mode
（
Mode 0
）
..................................................................................................................................... 15
6.3 Wake-up Mode
（
Mode 1
）
.................................................................................................................................. 15
6.4 Power-saving Mode
（
Mode 2
）
......................................................................................................................... 15
6.5 Sleep Mode (Mode 3) ............................................................................................................................................. 16
7. Instruction Format .............................................................................................................................. 16
7.1 Default Parameter .................................................................................................................................................... 16
7.2 Reading Operating Parameters ............................................................................................................................ 17
7.3 Reading Version Number ....................................................................................................................................... 17
7.4 Reset Instruction ...................................................................................................................................................... 17
7.5 Parameter Setting Instruction ............................................................................................................................... 17
8. Parameter Setting ............................................................................................................................... 19
9. Production Guidance ......................................................................................................................... 19
9.1 Reflow Soldering Temperature ............................................................................................................................ 19
9.2 Reflow Soldering Curve .......................................................................................................................................... 20
10. FAQ .......................................................................................................................................................... 20
10.1 Communication range is too short ................................................................................................................... 20
10.2 Module is easy to damage .................................................................................................................................. 20
11. Important Notes ................................................................................................................................ 21
12. About Us ............................................................................................................................................... 21

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 5 / 21
1. Features
l Strong ability of diffraction: 230M features in low frequency, long wave length and strong ability of diffraction. It is applicable
in complicated environment.
l Narrow band transmission: Narrow band features high density, long transmitting distance and strong anti-interference ability.
At same transmitting power, the transmitting distance is much longer than that of others.
l Ultra-low power consumption: It supports WOR, which suits for battery power supply. In power-saving mode (Mode 2), the
overall power consumption can be regulated by setting receiving response delay and its maximum is 2000ms. The average current
is about 30uA.
l Fixed transmission: Module can communicate with other modules which work in different channels and addresses. It makes
networking and repeater easy. For example: module A transmits AA BB CC to module B (address: 0x00 01, channel: 0x80). The HEX
format is 00 01 80 AA BB CC (00 01 refers to the address of module B, and 80 refers to the channel of module B). Then module B
receives AA BB CC (only module B).
l Broadcast transmission: When the module address is set as 0xFFFF, the module can communicate with other modules in the
same channel.
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 2.0uA in this mode. It can still receive the configuration from the MCU.
l Application: 230M is electricity frequency band with few interferences and strong diffraction ability. It is applicable in complicated
environment including working plant, factory, warehouse, office building and community.
2. Technical Parameters
Model
IC
Size
Net weight
Operating
temperature
Operating
humidity
Storage
temperature
E51-TTL-50
AX5043
21*36mm
6.7±0.1g
-40 ~ 85℃
10% ~ 90%
-40 ~ 125°C
E51-TTL-500
AX5043
24*43mm
8.5±0.1g
-40 ~ 85℃
10% ~ 90%
-40 ~ 125°C
E51-TTL-2W
AX5043
37*60mm
25±0.1g
-40 ~ 85℃
10% ~ 90%
-40 ~ 125°C

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 6 / 21
2.1 Electrical Parameters
2.1.1 Transmitting Current
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
59
64
70
mA
● When designing current supply circuit, 30% margin is
recommended to be remained so as to ensure long-term
stable operation of the whole module.
● The current at the instant of transmitting may be high, but
the total energy consumed may be lower due to very short
transmitting time.
● When using external antenna, the impedance matching
degree at different frequency points between antenna and
module may affect the transmitting current value at
different levels.
E51-TTL-500
290
320
350
mA
E51-TTL-2W
948
1030
1140
mA
2.1.2 Receiving Current
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
10
11
12
mA
● 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 the developers have loaded
their own protocol to the whole module.
● The current at pure receiving mode will be mA level, the
users have to realize µA level receiving current through
firmware development.
E51-TTL-500
10
11
12
mA
E51-TTL-2W
14
15
17
mA
2.1.3 Turn-off Current
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
3.0
4.0
5.0
µA
● The turn-off current means the current consumed by CPU,
RAM, Clock and some registers which remain operating.
SoC is at very low power consumption status.
● 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.
E51-TTL-500
4.0
5.0
6.0
µA
E51-TTL-2W
4.0
5.0
6.0
µA
2.1.4 Vo l t a g e Supply
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
2.3
3.3
5.2
V DC
● If the module stays at maximum voltage for a long time, it
may be damaged.
● The power supply pin has certain surge-resistance ability,
but the potential pulse higher than the maximum power
supply voltage.
●The power supply is not advisable to be below 3.0V, or
the RF parameters will be influenced at different degree.
E51-TTL-500
3.3
5.0
5.2
V DC
E51-TTL-2W
3.3
5.0
5.2
V DC

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 7 / 21
2.1.5 Communication Level
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
2.5
3.3
3.6
V DC
●If the module stays at maximum communication level for a long time,
it may be damaged.
●Modules are compatible with some microcontrollers at 5V
communication level. Please refer to practical test or contact us for
more information.
E51-TTL-500
2.5
3.3
3.6
V DC
E51-TTL-2W
2.5
3.3
3.6
V DC
2.2 RF Parameters
2.2.1 Transmitting Power
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
16
17
18
dBm
● Due to the error of the materials, each LRC component has ±0.1%
error, so error accumulation will occur since multiple LRC
components are used in the whole RF circuit, and the transmitting
currents will be different at different modules.
● The power consumption can be lowered by lowering the
transmitting power, but the efficiency of the internal PA will be
decreased by lowering transmitting power due to various reasons;
● The transmitting power will be lowered by lowering the power
supply voltage.
E51-TTL-500
26
27
28
dBm
E51-TTL-2W
32
33
34
dBm
2.2.2 Receiving Sensitivity
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
-125
-126
-127
dBm
● The sensitivity is tested under the air data rate 1.3kbps.
● Due to the error of the materials, each LRC component has ±0.1%
error, so error accumulation will occur since multiple LRC
components are used in the whole RF circuit, and the transmitting
currents will be different at different modules.
●The receiving sensitivity will be reduced and communication range
will be shortened while increasing the air data rate.
E51-TTL-500
-125
-126
-127
dBm
E51-TTL-2W
-125
-126
-127
dBm
2.2.3 Recommended Working Frequency
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
225.0
230.0
237.6
MHz
● To work within the recommended frequency can assure the
modules to meet all the parameters.
● To avoid the crowded integral frequency like 433.0MHz 、
868.0MHz、915MHz etc. is advisable.
E51-TTL-500
225.0
230.0
237.6
MHz
E51-TTL-2W
225.0
230.0
237.6
MHz

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 8 / 21
2.3 Tested Parameters
2.3.1 Tested Distance
Model
Min
Typ
Max
Unit
Remarks
E51-TTL-50
1800
2000
2200
m
● The external antenna used is of 2.5dBi gain and vertical
polarization. The height is 2.5 meters.
● The interval between each data packet is 2s, sending 100
packets with 30 bytes in each packet, the range at data lose
rate of lower than 5% is valid range.
● In order to obtain meaningful and reproducible results,
we conducted the tests under in clear weather with little
electromagnetic interference at suburb areas.
● Distance may be shorter with interference or obstacles.
E51-TTL-500
3600
4000
4400
m
E51-TTL-2W
7200
8000
8800
m
3. Mechanical Characteristics
3.1 E51-TTL-50
3.1.1 Dimension

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 9 / 21
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 indicate mod ule ’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
3.2 E51-TTL-500
3.2.1 Dimension

AX5043 Wireless Module User Manual of E51 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 10 / 21
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 indicate mod ule ’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
3.3 E51-TTL-2W
3.3.1 Dimension