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Lierda Science & Technology Group Co.,Ltd
利尔达科技集团股份有限公司
Operation Manual
for Wireless IoT Transceiver
Product Name: SX1278 Wireless Transceiver
Product Number：LSD4RF-29717N10
Revision : V1.0
Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
Tel: +86 571 88800000 Fax:+86 571 89908080
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Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
Document History
Product
Name
SX1278 Wireless Transceiver
Product Number
LSD4RF-2F917N10
Checker
刘建
Submission Date
20160721
No.
Revise History
Checker
Approver
Revision
Submission
Date
1
First FINAL document version
刘建
孙香涛
V1.0
2016-07-21
Tel: +86 571 88800000 Fax:+86 571 89908080
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Contents
1 General Description........................................................................................................................................4
2 Technical requirement specifications....................................................................................................... 6
3 Module Mechanical Drawing & Pin Description.......................................................................................... 7
4 Operating Description.................................................................................................................................... 8
5 Additional information................................................................................................................................. 9
6 Antenna specification................................................................................................................................. 10
Important Notes:................................................................................................................................................. 11
Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
Tel: +86 571 88800000 Fax:+86 571 89908080
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1 General Description
The LSD4RF-2F917N10 module is a high-performance RF transceiver with a highly
integrated SX127X. Using Semtech’s patented LoRaTMmodulation technique can greatly
increase the communication distance, which is widely applied to various occasions of short
distance IoT wireless communication field. It has small size, low power consumption, long
transmission distance, strong immunity from interference and other characteristics. The user
can be free to choose different antenna , consequently, is easy to second development and its
popularization.
KEY PRODUCT FEATURES
● Supply voltage: DC 2.4
● Operating Frequency:900~925MHz
● RF output power: 19±1 dBm(max)
● High sensitivity：-136±1dBm (@250bps)
● Ultra effective communication distances:5Km@250bps（Urban road environment, not
the desert environment
● Using spread spectrum modem, which is capable of achieving significantly longer
range than existing systems based on FSK or OOK modulation. It provides significant
advantages ,especially in the terrible noise environment (eg. nearby the strong interference
sources and in the natural shielding environment)
● High confidentiality, using LoRaTMmodulation , traditional wireless devices can not
capture and parse.
● High concealment,it still can normal communication when average power under
）
～
3.6 V
Digital Noise Floor, wireless monitoring equipment unable to listen to.
● Support LoRaTM, FSK, GFSK, MSK, GMSK and OOK modulation
● Low power consumption：current in receive mode ≤13mA；current in sleep mode
≤2uA；Provide CAD functions which separate the calculation and reception, further optimize
the power consumption of waking up the window. (the calculating current is about half of
receving current).
Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
Tel: +86 571 88800000 Fax:+86 571 89908080
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● SPI communication interface,it can be connected directly to all kinds of
microcontroller, the software programming is very convenient.
APPLICATIONS
● Automated Meter Reading for water meter, gas meter, electricity meter, thermal meter
● Ultra-long range communication
● Home and Building Automation
● Industrial remote sensing, telemetering communication
● Industrial Monitoring and Control, Wireless Alarm and Security Systems
● Active RFID
Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
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2 Technical requirement specifications
Parameter
Performance Requirements
Remarks
Supply Voltage
DC 2.4 ～ 3.6 V
Operating Temperature
-40 ～ 85 ℃
Operating Humidity
10%~90%
non-condensing
Operating Frequency
900~925 MHz
Programmable
Power Consumption
Transmit mode
≤100 mA
Conditions:
900~925 MHz, Pout=17 dBm
Receiver mode
≤17mA
Conditions:
900~925 MHz, LoRaTMModem
Sleep mode
≤2uA
RF output power
19 ± 1dBm
Programmable
Modulations
LoRaTM\2-FSK\GFSK\OOK
Recommended: LoRa
TM
Bit Rate Range
OOK：1.2~32.768Kbps
Programmable
Recommended: use LoRa
TM
at low bit rate (<5kbps)
LoRaTM：0.2~37.5Kbps
interface type
stamp hole
Pitch: 2.0mm
communication
interface
SPI
Module Size
(without antenna)
18.4 × 18.4（GB/T1804-c
）
Unit：mm
Static Level
Refer to chapter 5
Interface Selection
Refer to chapter 5
Table 1 Module Specifications
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3 Module Mechanical Drawing & Pin Description
Number
Name
Description
1
VCC
Supply voltage
2
GND
Ground
3
SI
SPI Data input
4
SCK
SPI Clock input
As shown in the bottom view of Figure 1, the LSD4RF-2F917N10 connects to the host
board via solder pads on the module.
Figure 1 LSD4RF-2F917N10 Module Mechanical Drawing
Table 2 shows Pin Description
Table 2 LSD4RF-2F917N10 Pin Description
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：
Unit： mm
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5
SO
SPI Data output
6
DIO1
RxTimeout、 CadDetected
7
DIO2
8
NSS
SPI enabled
9
DIO0
Required，RxDone、TxDone、CadDone
10
RST
Required, Reset trigger input
11
GND
Ground
12
RF
RF input / output
13
DIO5
ModeReady、 ClkOut
14
DIO3
ModeReady、ClkOut
For more information about DIOx that can be found in the chapter 5.
4 Operating Description
The LSD4RF-2F917N10 module is soldered to the applications main board and
communication with micro-controller by SPI interface. Figure below shows a typical SPI single
access to a register. To get the detail description, please consult the latest data sheet of
SX1278.
Figure 2 SPI Timing Diagram (single access)
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5 Additional information
To maximize RF performance, the user should follow these recommendations:
1. Power Supply
It is recommended to use DC regulated power supply to the module, and the small power
supply ripple coefficient is required. The module should be reliable grounding, and please
pay attention to the correct connection power, if reverse, maybe result in permanent damage
to the module.
2. About Antenna
Ensure that there is no component, mounting screw or ground plane near the antenna.
All these incorrect design can reduce the communication distance of module seriously.
3. Protection of ESD electrostatic
Modules can be static tested by connecting discharge 4 kv, air discharge 8 kv;
The arc distance module about 10 cm when air discharge;
Therefore, it shall takes all necessary ESD measures in order to avoid permanent damage to
the device.
4. Trade-offs advice on DIOx
DIO has three functions, The first is the RF interrupt flag reflects, the other is the
PLL_Lock signal output, a third is Clock signal output of the RF module (generally do not use
this function). Under the condition of without considering power consumption, can not use any
DIO.
In most application scenarios (transceiver, low-power wake up), DIO0 will choose IO,
other IO can choice according to the situation.
DIO0, DIO1, DIO3 contains all interrupt mapping, If you don't use this feature, DIO0,
DIO3 will meet the requirements;
2F717N01 module provides DIO0,DIO1,DIO3
2F717N10 module provides DIO0,DIO1,DIO2,DIO3,DIO4
2F917N10 module provides DIO0,DIO1,DIO2,DIO3,DIO5
2F917N10 module provides DIO0,DIO1,DIO2,DIO3,DIO5
DIO mapping is shown below:
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6 Antenna specification
antenna change may lead further evaluation on emission as per FCC part 15c.
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Important Notes:
1. Welcome to use the products of the Lierda Technology Co., Ltd.. Before using the
Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
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products of our company, please read this warning first. If you have already used the product
which indicates that you have read and accepted the warning. Using the product indicates that
you have read and accepted this warning.
2. The final interpretation and modification of all the information provided to this tool
are reserved. No more notification will be given if the information were updated.
Publisher: Lierda Science & Technology Co.,Ltd
WSN Dept.
2016/ 07/21
FCCID: N8NLSD4RF2F917N10
FCC statement
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.
—
RF exposure warning
The equipment complies with FCC RF exposure limits set forth for an uncontrolled
·
environment.
The equipment must not be co-located or operating in conjunction with any other antenna or
Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
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transmitter.
NOTE: Any changes or modifications not expressly approved by the grantee of this device
could void the user's authority to operate the equipment.
The module’s FCC ID is not visible when installed in the host, or If the host is marketed so
that end users do not have straight forward commonly used methods for access to remove the
module so that the FCC ID of the module is visible; then an additional permanent label
referring to the enclosed module: Contains Transmitter Module FCC ID:
N8NLSD4RF2F917N10; or Contains FCC ID: N8NLSD4RF2F917N10 must be used.
This device is intended for OEM integrators only.
further evaluation to the host level with regards to un-intential spurious emission as per FCC
15B
Add: Building 1, Lierda IoT Park, No.1326, wenyixi Road, Hangzhou, Zhejiang China
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