Ebyte LoRa SX-1276 1W User manual

Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
1
User Manual
General introduction
LoRa SX-1276 1W module is a small-sized Sub 1GHz LoRaTM SMD wireless module designed by Chengdu Ebyte, based on the original
imported RF chip SX1278/SX1276 from SEMTECH, supporting LoRa Spread spectrum technology, which brings longer transmission
distance and has the advantages of concentrated power density and strong anti-interference.
The 30dBm module with PA(power amplifier) and low-noise amplifier enhanced the communication stability and communication
distance; The 20dBm module integrated the industrial crystal oscillator, accuracy is less than 10ppm, with stable batch production, and
widely used for utilities, IOT transformation and smart home,
The related RF parameters can get through the domestic and overseas certification, such as FCC, CE, RoHs etc., satisfying export
demand.
Model No.
RF IC
Operating
Frequency
Transmitting Power
Communication
distance
Packaging
Antenna type
MHz
dBm
km
LoRa SX-1276
1W module
SX1276
902~928
30
10.0
SMD
Stamp hole
/IPEX
LoRa SX-1276 1W module series module is a hardware platform. Without any program, users need to conduct the secondary
development.

SX127X RF Module User Manual of E19 Series Modules
Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
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Contents
GENERAL INTRODUCTION................................................................................................................................................................ 1
1. TECHNICAL PARAMETERS ...................................................................................................................................................... 3
1.1 GENERAL PARAMETERS.........................................................................................................................................................................................3
1.2 ELECTRICAL PARAMETERS .....................................................................................................................................................................................3
1.2.1 Transmitting current ................................................................................................................................................................................3
1.2.2 Receiving current......................................................................................................................................................................................3
1.2.3 Turn-off current........................................................................................................................................................................................3
1.2.4 Supply voltage...........................................................................................................................................................................................3
1.2.5 Communication level...............................................................................................................................................................................4
1.3 RF PARAMETERS ...................................................................................................................................................................................................4
1.3.1 Transmitting Power..................................................................................................................................................................................4
1.3.2 Receiving sensitivity.................................................................................................................................................................................4
1.3.3 Recommended Frequency.....................................................................................................................................................................4
1.4 TESTED DISTANCE .................................................................................................................................................................................................5
2. PIN DEFINITION................................................................................................................................................................................. 5
3.USAGE ..................................................................................................................................................................................................... 6
4. REMARK .......................................................................................................................................................................................... 6
5. PRODUCTION GUIDANCE .............................................................................................................................................................. 7
5.1 REFLOW TEMPERATURE........................................................................................................................................................................................7
5.2 REFLOW GRAPH....................................................................................................................................................................................................7
6. FAQ.......................................................................................................................................................................................................... 7
6.1 THE COMMUNICATION DISTANCE IS TOO CLOSE ................................................................................................................................................7
6.2 THE MODULE CAN BE DAMAGED EASILY ..............................................................................................................................................................8
7. IMPORTANT STATEMENT .............................................................................................................................................................. 8
8.ABOUT US .............................................................................................................................................................................................. 9

Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
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1. Technical parameters
1.1 General parameters
Model No.
IC
Size
Net WT
Operating temp.
Operating humidity
Storage temp.
LoRa SX-1276
1W module
SX1276
25.0*40.0 mm
5.2±0.1g
-40 ~ 85℃
10% ~ 90%
-40 ~ 125°C
1.2 Electrical parameters
1.2.1 Transmitting current
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
570.4
620.0
682.0
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.
1.2.2 Receiving current
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
21.2
23.0
25.3
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.
1.2.3 Turn-off current
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
1.5
3.0
4.5
µA
●The turn-off current means the current consumed when
CPU, RAM, Clock and some registers remain operating while
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.
1.2.4 Supply voltage
Model No.
Min
Typ
Max
Unit
Remark

SX127X RF Module User Manual of E19 Series Modules
Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
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LoRa SX-1276 1W
module
3.3
3.5
5.5
V DC
●If the voltage is at maximum value for long time, the
module 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 voltage is recommended to be higher
than 3.0V, if the voltage is lower than 3.0V, the RF
parameters will be affected at different degrees.
1.2.5 Communication level
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
1.8
3.3
3.6
V DC
●If the communication level is higher than the allowed
maximum value, the module may be damaged;
●Although the communication level can be switched with
various methods, the power consumption of the whole
module will be affected at great degree.
1.3 RF parameters
1.3.1 Transmitting Power
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
29.6
30.0
30.5
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.
1.3.2 Receiving sensitivity
Model No.
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
-147.2
-148.0
-149.2
dBm
●The current sensitivity is tested under the Coding rate of
4/5 and spread spectrum factor of 12
●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 range will be
shortened while increasing the air data rate.
1.3.3 Recommended Frequency
Model No
Min
Typ
Max
Unit
Remark

SX127X RF Module User Manual of E19 Series Modules
Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
5
LoRa SX-1276 1W
module
900.0
915.0
931.0
MHz
●It ensures that the performance of the module can reach
the standard if it works in recommended operating
frequency.
●It is recommended to avoid the crowded frequencies, such
as 433.0MHz, 868.0MHz, 915MHz and other integer
frequencies.
1.4 Tested distance
Model No
Min
Typ
Max
Unit
Remark
LoRa SX-1276 1W
module
9000
10000
11000
m
● The external antenna used is of 5dBi gain and vertical
polarization;
● 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 reproduceable results,
we conducted the tests under in clear weather with little
electromagnetic interference at suburb areas；
● Distance may be shorter with interference or obstacles.
2. Pin definition
2.1.2 LoRa SX-1276 1W module
Pin No.
Name
Direction
Usage
1
GND
Ground electrode, connected to the power reference ground.
2
DIO5
Input/Output
Configurable IO port（Please find more on SX127X datasheet）.
3
DIO4
Input/Output
Configurable IO port（Please find more on SX127X datasheet）
4
DIO3
Input/Output
Configurable IO port（Please find more on SX127X datasheet）
5
DIO2
Input/Output
Configurable IO port（Please find more on SX127X datasheet）
6
DIO1
Input/Output
Configurable IO port（Please find more on SX127X datasheet）

SX127X RF Module User Manual of E19 Series Modules
Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
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7
DIO0
Input/Output
Configurable IO port（Please find more on SX127X datasheet）
8
RST
Input
Reset
9
GND
Configurable IO port（Please find more on SX127X datasheet）
10
GND
Configurable IO port（Please find more on SX127X datasheet）
11
VCC
Power supply: 4.75~5.5V (Ceramic filter capacitor is advised to add)
12
SCK
Input
SPI clock
13
MISO
Output
Master output slave input
14
MOSI
Input
Master input slave output
15
NSS
Input
Chip select
16
TXEN
Input
Radio frequency switch control, make sure the TXEN pin is in
high level, RXEN pin is in low level when transmitting.
17
RXEN
Input
Radio frequency switch control, Make sure the RXEN pin is in
high level ,TXEN pin is in low level when receiving.
18
GND
Ground electrode, connected to the power reference ground
19
ANT
Antenna
20
GND
Ground electrode, connected to the power reference ground
21
GND
Ground electrode, connected to the power reference ground
★Please find more on SX127X6 datasheet from SEMTECH ★
3.Usage
Brief introduction of connection between module and MCU (STM8L)
4. Remark
⚫DIO0、DIO1、DIO2、DIO3、DIO4、DIO5 is generally purpose I/O, can be configured into multiple function,please check SX1278/SX1276
manual for more details, floating is allowed.
⚫RST, TXEN, RXEN pin must be connected, in which RST control the reset of chip, TXEN, RXEN pin control RF switch.

SX127X RF Module User Manual of E19 Series Modules
Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
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⚫Make sure the grounding is good, with low power ripple, also should increase filter capacitor and as close as possible to the VCC and
GND pins.
⚫SPI communication rate should not be set too high, usually around 1M
⚫Make sure TXEN pin is high level, RXEN pin is low level when transmitting;
make sure RXEN pin is high level, TXEN pin is low level when receiving;
make sure TXEN、RXEN pin is low level before turning off.
⚫The register configuration can be reinitialized to obtain higher stability when the chip is invalid.
5. Production Guidance
5.1 Reflow Temperature
Preheating zone：Maximum temperature rise is 2.5℃/s；
Insulation zone：temperature: 150~190℃，time: 60~90s，Maximum temperature rise is 2.5℃/s；
Recirculation zone：Maximum temperature is 235~245℃，Above 217℃, the time will be 40~80s；
Cooling zone：Maximum cooling is 4℃/s.
5.2 Reflow Graph
6. FAQ
6.1 The communication distance is too close
⚫When there’s straight Communication barrier, the communication distance will be reduced accordingly.
⚫Temperature, humidity and same frequency interference will increase the rate of communication packet loss.
⚫Ground absorption, reflected radio waves, and closing to ground will lead to poor test result.
⚫Sea water has a strong ability to absorb radio waves, so test near the sea is not recommended .
⚫If antennas surrounded by metal items or placed in metal shell, the signal will be weakened badly.
⚫Power register is set wrongly or air data rate too high.(The higher the air data rate, the closer the distance.
⚫In room temperature, the power voltage will be less than 2.5V. The lower the the power voltage, the smaller the power.
⚫The antenna is unmatched to the module or the quality of antenna.

SX127X RF Module User Manual of E19 Series Modules
Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
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6.2 The module can be damaged easily
⚫Please check the power supply, which should be 1.8v-3.8v. If the value exceeds that, the module will be damaged.
⚫Please check the stability of power supply. The voltage cannot be in fluctuations frequently.
⚫Please ensure all the installation operations are anti-static.
⚫Please ensure the humidity in the procedure of installation and operation should not be too high because some electrical parts are
humidity sensitive device.
⚫Please do not use it in a too high or too low temperature environment if there’s no special requirement.
7. Important statement
⚫Ebyte reserves the rights of final interpretation and revision for all the involved contents in this manual.
⚫With the continuous improvement of hardware and software, this manual may subject to change without notice. Please refer to the
latest version.
⚫Users can follow the product news on our official website so as to gain the latest information.
FCC Caution
⚫This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
⚫Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.
⚫Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This
equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01
2.2 List of applicable FCC rules
CFR 47 FCC PART 15 SUBPART C has been investigated. It is applicable to the modular transmitter
2.3 Specific operational use conditions
This module is stand-alone modular. If the end product will involve the Multiple simultaneously transmitting condition or different operational
conditions for a stand-alone modular transmitter in a host, host manufacturer have to consult with module man
2.4 Limited module procedures
Not applicable
2.5 Trace antenna designs
Not applicable

SX127X RF Module User Manual of E19 Series Modules
Copyright ©2012–2017，Chengdu Ebyte Electronic Technology Co.,Ltd
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2.6 RF exposure considerations
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and
operated with minimum distance 20cm between the radiator & your body.
2.7 Antennas
This radio transmitter Y8E-VM-LORA has been approved by Federal Communications Commission to operate with the antenna types listed below,
with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any
type listed are strictly prohibited for use with this device.
Antenna No.
Operate frequency band
Antenna Type
Maximum antenna gain
Antenna 1
902-928MHz
External Antenna
1.5dBi
2.8 Label and compliance information
The final end product must be labeled in a visible area with the following" Contains FCC ID:Y8E-VM-LORA".
2.9 Information on test modes and additional testing requirements
Host manufacturer is strongly recommended to confirm compliance with FCC requirements for the transmitter when the module is installed in the
host.
2.10 Additional testing, Part 15 Subpart B disclaimer
Host manufacturer is responsible for compliance of the host system with module installed with all other applicable requirements for the system such
as Part 15 B.
8. About US
Technical support: suppor[email protected]
Documents and RF Setting download link: www.cdebyte.com/en/
Tel：[phone]
Fax：[phone]
Web：www.cdebyte.com/en/
Address：Innovation Center D347, 4# XI-XIN Road,Chengdu, Sichuan, China