Ai-Thinker Technology Ra-01SC User manual

Ra-01SC Specification V1.1
Ra-01SC Specification
Version V1.1
Copyright ©2021
Copyright © 2021 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved Page 1 of 19

Ra-01SC Specification V1.1
Disclaimer and copyright notice
The information in this article, including the URL address for reference, is subject to change without
prior notice.
The documentation is provided "as is" without any warranty, including any warranties of
merchantability, fitness for a particular purpose, or non-infringement, and any warranties mentioned in the
proposal, specification or sample. This document is not responsible for any infringement of any patent rights
arising out of the use of the information in this document. No license, express or implied, by estoppel or
otherwise, is hereby granted.
The test data obtained in this paper are all obtained by Ai-Thinker laboratory , and the actual results
may be slightly different.
The Wi-Fi alliance membership mark is owned by the WiFi alliance.
All trade mark names, trademarks and registered trademarks mentioned herein are the property of their
respective owners and are hereby declared.
The final interpretation right is owned by Shenzhen Ai-Thinker Technology Co., Ltd.
Note
The contents of this manual may be changed due to the version upgrade of the product or other reasons.
Shenzhen Ai-Thinker Technology Co., Ltd. reserves the right to modify the contents of this manual without
any notice. This manual is only used as a guide, and Shenzhen Ai-Thinker Technology Co., Ltd. makes every
effort to provide accurate information in this manual, but Shenzhen Ai-Thinker Technology Co., Ltd. does
not ensure that the contents of the manual are completely true,, All statements and information in this manual.
and the recommendations do not constitute for any warranty, express or implied.
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Ra-01SC Specification V1.1
Document development/revision/revocation resume
Vision Data Revised content Edition Approve
V1.0 2021.3.15 First Edition Shengxin Zou Ning Guan
V1.1 2021.3.31 Update Shengxin Zou Ning Guan
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Ra-01SC Specification V1.1
CONTENT
1 Product Overview............................................................................................................................................. 5
1.1. Characteristics ................................................................................................................................... 5
1.2 Main parameters................................................................................................................................... 6
2 Electrical parameters ........................................................................................................................................ 7
2.1. Electrical character............................................................................................................................... 7
2.2. Digital port characteristics ................................................................................................................... 7
2.3. SPI Interface features ........................................................................................................................... 8
3 Appearance size................................................................................................................................................ 8
4 Pin function....................................................................................................................................................... 9
5 Schematics...................................................................................................................................................... 11
6 Design guidance ............................................................................................................................................. 12
6.1 Application Circuit............................................................................................................................ 12
6.2 Recommended module package design size....................................................................................... 12
6.3 Antenna installation............................................................................................................................. 13
6.4 Power Supply ...................................................................................................................................... 13
6.5 GPIO.................................................................................................................................................... 14
6.6 Software writing.................................................................................................................................. 14
7FAQ............................................................................................................................................................................... 16
7.1 Factors affecting transmission distance .............................................................................................. 16
7.2 Module use reminder........................................................................................................................... 16
7.3 Interfering factors ................................................................................................................................ 16
8Reflow Welding Curve ................................................................................................................................... 17
9Related models and antenna guide................................................................................................................. 17
10 Packaging information ................................................................................................................................. 18
11 Contact us .................................................................................................................................................... 18
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Ra-01SC Specification V1.1
1. Product Overview
LoRa series module Ra-01Sc is designed and developed by Shenzhen Ai-Thinker
Technology Co., Ltd. This module is used for ultra-long distance spread spectrum
communication. Its RF chip LLCC68 mainly uses LoRa ™ remote modem for ultra-long
distance spread spectrum communication, with strong anti-interference and low power
consumption. LLCC68 chip has a high sensitivity of over-129 dBm, a 20 dBm power output, a
long transmission distance and a high reliability with SEMTECH's LoRa ™ patent modulation
technique. Meanwhile, comparing with the traditional modulation technology,LoRa ™
provides significant advantages in both blocking and selectivity over conventional modulation
techniques. It solves the problem of simultaneously balance the distance, the anti-interference
and the power consumption which the traditional design scheme can’t achieve.
Application areas
automatic meter reading, supply chain and logistics, home building automation, security
system, remote irrigation system.
1.1.
Characteristics
Support spreading factor:SF5/SF6/SF7/SF8/SF9/SF10/SF11
Small volume double row stamp hole patch for SMD package
Adopts SPI interface, half-duplex communication, with CRC, up to 256-b yte packet
engine





LoRa™ modem
Support
FSK

Frequency supports 410MHz~525MHz
Operating voltage is 3.3V, Max current
:140m
Low power consumption in a received state, the min received current is 4.2mA
，stand-
by
current is 0.6mA
High sensitivity
：
As low as -129dBm
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Ra-01SC Specification V1.1
1.2 Main parameters
T
able 1 main parameters instruction
Model Ra-01SC
Package SMD16
Size 17*16*3.2(±0.2)mm
Antenna Spring antenna
Frequency
range 410MHz~525MHz
Operating
Temperature
-40 ℃ ~ 85 ℃
Storage
environment
-40 ℃ ~ 125 ℃ , < 90%RH
Power supply 2.7~3.6V，typical value 3.3V，recommended current > 200mA
Support
Interface SPI
Programmable
bit rate Max up to 300Kbps
Crystal
frequency 32MHz
Transmission
distance
In an open environment, this module match with spring antenna the
transmitting range can reach 2.8km or match with suction cup antenna
the transmitting range can reach 4.6km.
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Ra-01SC Specification V1.1
2. Electrical parameters
Ra-01SC series modules are electrostatic sensitive devices, special precautions need to be taken when
handling.
Note：
Ra-01SC module is electrostatic sensitive devices
（ ESD ）， It requires special ESD precautions and should
generally be classified as an ESD sensitive component. During the entire handling, transportation and
operation of the Ra-01SC module, proper ESD handling and packaging procedures should be used. Please do
not touch the module with hands or use a non-antistatic soldering iron for soldering, so as not to damage
the module.
2.1. Electrical character
Parameter Name Min Typ Max Unit Remarks
Operating
temperature
TOPR -40 25 85 ℃ Industrial design
Supply
voltage
VDD 2.7 3.3 3.6 V ≥3.3V(Guaranteed
output power)
2.2. Digital port characteristics
Description Typ Unit
Operating frequency 410~525 MHz
IO Name Min Typ Max Unit
IO level VIO 2.7 3.3 3.6 V
Low input logic
level
VIL - - 0.2 V
High input logic
level
VIH 0.8 - - V
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Ra-01SC Specification V1.1
Low output logic
level VOL - - 0.1 V
High output logic
level VOH 0.9 - - V
2.3. SPI Interface features
Name Description Condition Min Typ Max Unit
Fsck SCK frequency - - - 10 MHz
TCH SCK High level
time
- 50 - - ns
TCL SCK Low level time - 50 - - ns
Trise SCK Rise time - - 5 - ns
Tfall SCK Fall time - - 5 - ns
Tsetup MOSI Time setting From MOSI
change to SCK
rising edge
30 - - ns
Thold MOSI Duration Change from rising
edge of SCK to
MOSI
20 - - ns
Tnsetup NSS Set up time From NSS falling
edge to SCK rising
edge
30 - - ns
Tnhold NSS Time maintain From SCK falling
edge to NSS rising
edge, normal mode
100 - - ns
Tnhigh SPI Access interval
NSS High level time
- 20 - - ns
T_DATA DATA maintenance
and set up time
- 250 - - ns
3. Appearance size
Ra-01SC has one antenna interface ：Spring antenna
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Ra-01SC Specification V1.1
4. Pin function
Ra-01SC module is connected to 16 interfaces, refer to pin diagram, pin function definition table is interface
definition.
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Ra-01SC Specification V1.1
Ra-01SC Pin diagram
Table Pin function definition
No. Name Function instruction
1
ANT
Ground
2 GND Ground，Connect to the power reference ground
3 3.3V Typical value 3.3V，recommended current > 200mA
4
RESET
Reset
5
TXEN
RF control port
6 DIO1 Digital IO1 software configuration
7
DIO2
Digital IO2 software configuration
8
DIO3
Digital IO3 software configuration
9
GND
Ground
10 BUSY Status indicator pin（Be sure to connect to the IO port of
the master MCU
）
11
RXEN
RF control port
12
SCK
SPI clock input
13
MISO
SPI data output
14 MOSI SPI data input
15 NSS SPI chip select input
16 GND Ground，Connect to the power reference ground
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Ra-01SC Specification V1.1
The three general IO pin of LLCC68 can be available in LoRa™ mode.
Their mapping depends on the configuration of the two registers RegDioMapping1 and RegDioMapping2.
Operating
Mode
DIOx
Mapping DIO3 DIO2 DIO1
All
00 CadDone
Fhss
Change
Channel
RxRimeout
01 Valid
Header
Fhss
Change
Channel
Fhss
Change
Channel
10 PayloadCrc
Error
Fhss
Change
Channel
CadDetected
11 - - -
5. Schematics
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Ra-01SC Specification V1.1
6. Design guidance
6.1
Application Circuit
（1）In addition to the SPI interface, the communication interface with the master MCU must
also connect BUSY/DIO1 to the IO port of the master MCU
（2）If the antenna is soldered on the main control board, it is recommended to reserve a Π
matching circuit at the antenna interface.
6.2 Recommended module package design size
Note
： This is the package drawing of the Ra-01SC module. It is recommended to design the
PCB board according to this drawing so that the module can work normally on the PCB board;
and when designing the pads, pay attention to the design of the pads on the PCB. The pad is
retracted and offset, and the PCB pad is expanded relative to the module pad without affecting
the use of the module.
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Ra-01SC Specification V1.1
6.3 Antenna installation
(1) Ra-01SC has one spring antenna, the antenna can not be replaced by other authorized
antennas；
(2) In order to meetthe best antenna effect，the location of theantenna assembly should be
far away from the metal parts；
(3) The antenna installation structure has a great influence on the performance of the
module. Make sure that the antenna is exposed, preferably vertically upward;
(4) The antenna must not be installed inside the metal shell, which will greatly reduce the
transmission distance.
6.4 Power Supply
（1）Recommended voltage 3.3 V, Peak:Current over 200mA.
（2）It is recommended to use the LDO power supply；If DC-DC is used, the ripple is
controlled within 30 mV.；
（3）DC-DC power supply circuit is recommended to reserve the position of the dynamic
response capacitor, and the output ripple can be optimized when the load change islarge.；
（4）3.3V power jack advise to add ESD components.；
（5）When designing the power supply circuit for the module, it is recommended to reserve
more than 30% of the power supply current, which is conducive to the long-term stable
operation of the whole machine；
（6）Please pay attention to the correct connection of the positive and negative poles of the
power supply. Reverse connection may cause permanent damage to the module.
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Ra-01SC Specification V1.1
6.5 GPIO
（1）There are some GPIO ports on the periphery of the module. If you need to use a 10-100 ohm resistor
in series with the IO port, it can suppress overshoot and make the levels on both sides more stable, which is
helpful for EMI and ESD.
（2）For the pull-up and pull-down of special IO ports, please refer to the instructions in the
specification, which will affect the startup configuration of the module;
（3）The IO port of the module is 3.3V. If the main control and the IO level of the module do
not match, a level conversion circuit needs to be added
（4）If the IO port is directly connected to a peripheral interface, or a terminal such as a
header, it is recommended to reserve an ESD device near the terminal of the IO trace.
Table Level switching circuit
6.6 Software writing
(1) This module is LLCC68+ peripheral circuit, users can operate according to LLCC68 chip
manual；
(2) DIO1,DIO2,DIO3 are general-purpose IO ports, which can be configured into multiple
functions；
(3)The control of the RF switch TX/RX is completed by the internal circuit of the module by
default. But the interface is reserved in the design, which can realize external MCU
control. If you need external MCU control, please contact Ai-Thinker technicians to
replace the module BOM.
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Ra-01SC Specification V1.1
Different between LLCC68 and SX1262/SX1268：
(1) SX1262/SX1268 support spreading factor SF5,SF6,SF7,SF8,SF9,SF10,SF11,SF12；
SX1262/SX1268 can set spreading factor and receiving bandwidth:
LoRa@ Rx/Tx，BW = 7.8 - 500 kHz,
SF5 TO SF12,BR=0.018-62.5 Kb/S
(2) LLCC68 support spreading factor SF5,SF6,SF7,SF8,SF9,SF10,SF11.
LLCC68can set spreading factor and receiving bandwidth:
LoRa@ Rx/Tx，BW = 125 - 250 - 500 kHz,
LoRa@，SF=5-6-7-8-9 for BW=125kHz,
LoRa@, SF=5-6-7-8-9-10 for BW =250 kHz,
LoRa@，SF=5-6-7-8-9-10-11 for BW=500 kHz;
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Ra-01SC Specification V1.1
7. FAQ
7.1 Factors affecting transmission distance
(1) When there is a straight line communication obstacle, the communication distance will be
attenuated accordingly
(2) Temperature, humidity, and co-frequency interference will increase the communication
packet loss rate;
(3) The ground absorbs and reflects radio waves, the test effect is poor when it is close to the
ground
(4) Sea water has a strong ability to absorb radio waves, so the seaside test results are poor；
(5) If there is a metal object near the antenna or placed in a metal shell, the signal attenuation
will be serious；
(6) Incorrectly set the power register, and the air speed is set too high (the higher the air speed,
the closer the distance)
(7) The low voltage of the power supply at room temperature is lower than the recommended
value, the lower the voltage, the lower the power output;；
(8) The poor matching degree of the antenna and the module or the quality of the antenna itself
7.2 Module use reminder
(1) Check the power supply to ensure that it is between the recommended supply voltages. If it
exceeds the maximum value, it will cause permanent damage to the module;
(2) Check the stability of the power supply, and the voltage should not fluctuate significantly
and frequently;
(3) Ensure the anti-static operation during installation and use, and the electrostatic sensitivity
of high-frequency devices;
(4) Ensure that the humidity during installation and use should not be too high, and some
components are humidity sensitive devices;
(5) If there is no special requirement, it is not recommended to use it at too high or too low
temperature.
7.3 Interfering factors
(1) There is co-channel signal interference nearby,please stay away from the interference
source or modify the frequency and channel to avoid interference;
(2) The clock waveform on SPI is not standard, please check whether there is interference on
the SPI line, and the SPI bus line should not be too long;
(3) Unsatisfactory power supply may also cause garbled codes, so the reliability of the power
supply must be ensured;
(4) Extension cords and feeders are of poor quality or too long, which will also cause a high bit
error rate
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Ra-01SC Specification V1.1
8. Reflow Welding Curve
9. Related models
Model Chip Frequency Transmitting
power
Package Size Interface
Ra-01
SX1278
410MHz~525MHz
20dB
SMD
17*16
SPI
Ra-01H
SX1276
410MHz~525MHz
20dB
SMD
17*16
SPI
Ra-01S
SX1268
410MHz~525MHz
22dB
SMD
17*16
SPI
Ra-02
SX1278
410MHz~525MHz
20dB
SMD
17*16
SPI
Ra-06 SX1278 410MHz~525MHz 20dB SMD 22.8*16 SPI
Ra-07 ASR6501 410MHz~525MHz 20dB SMD 16*16 UART/I2C
Ra-07H ASR6501 803MHz~930MHz 21dB SMD 16*16 UART/I2C
Product related information：https://docs.ai-thinker.com/lora
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Ra-01SC Specification V1.1
10. Packaging information
Refer to below image, Ra-01SC package is in Tape/Reel.
11.
Contact us
Official website：https://www.ai-thinker.com
Development DOCS：https://docs.ai-thinker.com
Official Forum：http://bbs.ai-thinker.com
Sample purchase：https://ai-thinker.en.alibaba.com/
Business cooperation：[e-mail]
Technical support：[e-mail]
Company Address ： Room 403,408-410, Block C, Huafeng Smart Innovation Port, Gushu 2nd Road, Xixiang, Baoan
District, Shenzhen.
Tel ：[phone]
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FCC WARNING
FCC Caution: Any changes or modifications not expressly
approved by the party responsible for compliance could void the user's
authority to operate this equipment.
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.
This device and its antenna(s) must not be co-located or operating in conjunction
with any other antenna or transmitter.
15.105 Information to the user.
(b) For a Class B digital device or peripheral, the instructions furnished the
user shall include the following or similar statement, placed in a prominent
location in the text of the manual:
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, ifnot 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. Ifthis equipment doescause harmful
interference to radio or television reception, which can be determined by
turning the equipment offand 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 isconnected.
—Consult the dealer or an experienced radio/TV technician for help.
Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment.

This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
The availability of some specific channels and/or operational frequency bands
are country dependent and are firmware programmed at the factory to match
the intended destination.
The firmware setting is not accessible by the end user.
The final end product must be labelled in a visible area with the following:
“Contains Transmitter Module 2ATPO-RA-01SC”