MICROCHIP RN2903 Low-Power Long Range LoRa Transceiver Module User Manual

MICROCHIP RN2903 Low-Power Long Range LoRa Transceiver Module

General Features

•  On-board LoRaWAN™ Class A protocol stack
• ASCII command interface over UART
• Compact form factor: 17.8 x 26.7 x 3 mm
•  Castellated SMT pads for easy and reliable PCB mounting
•  Environmentally friendly, RoHS compliant
•  Compliance:
  • Modular Certified for the United States (FCC) and Canada (IC)
  •  Australia and New Zealand
•  Device Firmware Upgrade (DFU) over UART (see “RN2903 LoRa™ Technology Module Command Reference User’s Guide” DS40000000A)

Operational

• Single operating voltage: 2.1V to 3.6V (3.3V typical)
•  Temperature range: -40°C to +85°C
• Low-power consumption
•  Programmable RF Communication Bit Rate up to 300 kbps with FSK modulation, 12500 bps with LoRa™ Technology modulation
•  Integrated MCU, Crystal, EUI-64 Node Identity Serial EEPROM, Radio Transceiver with Analog Front End, Matching Circuitry
• 14 GPIOs for control and status

RF/Analog Features

• Low-Power Long Range Transceiver operating in the 915 MHz frequency band
•  High Receiver Sensitivity: down to -148 dBm
•  TX Power: adjustable up to +20 dBm high efficiency PA
•  FSK, GFSK, and LoRa Technology modulation
•  IIP3 = -11 dBm
•  >15 km coverage at suburban and >5 km coverage at urban area

Description
Microchip’s RN2903 Low-Power Long Range LoRa Technology Transceiver module provides an easy to use, low-power solution for long range wireless data transmission. The advanced command interface offers rapid time to market. The RN2903 module complies with the LoRaWAN Class A protocol specifications. It integrates RF, a baseband controller, command Application Programming Interface (API) processor, making it a complete long range solution. The RN2903 module is suitable for simple long range sensor applications with external host MCU.

Applications

• Automated Meter Reading
•  Home and Building Automation
•  Wireless Alarm and Security Systems
•  Industrial Monitoring and Control
• Machine to Machine
•  Internet of Things (IoT)

TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors@microchip.com. We welcome your feedback.

Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: http://www.microchip.com You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page. The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision of silicon and revision of document to which it applies. To determine if an errata sheet exists for a particular device, please check with one of the following:

•  Microchip’s Worldwide Web site; http://www.microchip.com
•  Your local Microchip sales office (see last page)

When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are using.
Customer Notification System
Register on our web site at www.microchip.com to receive the most current information on all of our products.

DEVICE OVERVIEW

The RN2903 transceiver module features LoRa Technology RF modulation, which provides long range spread spectrum communication with high interference immunity.Using LoRa Technology modulation technique, RN2903 can achieve a receiver sensitivity of -148 dBm. The high sensitivity combined with the integrated+20 dBm power amplifier yields industry leading link budget, which makes it optimal for applications requiring extended range and robustness.

LoRa Technology modulation also provides significant advantages in both blocking and selectivity compared to the conventional modulation techniques, solving the traditional design compromise between extended range, interference immunity, and low-power consumption.The RN2903 module delivers exceptional phase noise, selectivity, receiver linearity, and IIP3 for significantly lower power consumption. Figure 1-1, Figure 1-2, and Figure 1-3 show the module’s top view, the pinout, and the block diagram.

RN2903

Note 1:
Optional handshake lines are supported in future firmware releases.

**GENERAL SPECIFICATIONS

**

Table 2-1 provides the general specifications for the module. Table 2-2 and Table 2-3 provide the module’s electrical characteristics and current consumption. Table 2-4 and Table 2-5 show the module’s dimensions and the RF output power calibration data.

LoRa Technology modulation
RF connection| Board edge connection
Interface| UART
Operation Range| >15 km coverage at suburban; >5 km coverage at urban area
Sensitivity at 0.1% BER| -148 dBm (1)
RF TX Power| Adjustable up to max. 20 dBm on 915 MHz band (2)
Temperature (operating)| -40°C to +85°C
Temperature (storage)| -40°C to +115°C
Humidity| 10% ~ 90%

non-condensing

Note
Depends on modulation. Expand Spreading Factor (SF).  TX power is adjustable. For more information, refer to the “RN2903 LoRa™ Technology Module Command Reference User’s Guide” (DS40000000A).

3V (mA)**
---|---|---
2| 3.0| 42.6
3| 4.0| 44.8
4| 5.0| 47.3
5| 6.0| 49.6
6| 7.0| 52.0
7| 8.0| 55.0
8| 9.0| 57.7
9| 10.0| 61.0
10| 11.0| 64.8
11| 12.0| 73.1
12| 13.0| 78.0
14| 14.7| 83.0
15| 15.5| 88.0
16| 16.3| 95.8
17| 17.0| 103.6
20| 18.5| 124.4

TYPICAL HARDWARE CONNECTIONS

INTERFACE TO HOST MCU
The RN2903 module has a dedicated UART interface to communicate with a host controller. Optional handshake lines are supported in future firmware releases. The “RN2903 LoRa™ Technology Module Command Reference User’s Guide” (DS40000000A) provides a detailed UART command description. Table 3-1 shows the default settings for the UART communication.

GPIO PINS (GPIO1–GPIO14)
The module has 14 GPIO pins. These lines can be connected to switches, LEDs, and relay outputs. The pins are either logic inputs or outputs that can be accessed via the module firmware. These pins have limited sink and source capabilities. The current firmware release only supports output function on all GPIOs. Electrical characteristics are described in term.

RF CONNECTION
When routing RF path, use proper strip lines with an impedance of 50 Ohm.

RESET PIN
The module’s reset pin is an active-low logic input.

POWER PINS
It is recommended to connect power pins (Pin 12 and 34) to a stable supply voltage with sufficient source current. Table 2-2 shows the current consumption.Additional filtering capacitors are not required but can be used to ensure stable supply voltage in noisy environment.

PHYSICAL DIMENSIONS

RECOMMENDED PCB FOOTPRINT

APPLICATION INFORMATION

RF pins and strip line
The RF signals must be routed with properly terminated 50 Ohm strip lines. Use curves instead of sharp corners. Keep the routing path as short as possible. Figure 5.3 shows a routing example.

Approved Antennas
Modular certification of the RN2903 module was per-formed with the external antenna type mentioned in Table 5-1. Refer to Section 6.0 “Regulatory Approval” for specific regulatory requirements by country.

Chip Antenna                                            -1

APPLICATION SCHEMATIC

United States Contains FCC ID: W3I281333888668
Contains FCC ID: WAP4008
the RN2903 module has received Federal Communications Commission (FCC) CFR47 Telecommunications, Part 15 Subpart C “Intentional.

FCC STATEMENT

This device complies with Part 15 of the FCC Rules. Radiators” modular approval in accordance with Part Modular Transmitter approval. Modular Operation is subject to the following two conditions: approval allows the end user to integrate the RN2903

1.  this device may not cause harmful interference, module into a finished product without obtaining and
2.  this device must accept any interference subsequent and separate FCC approvals for received, including interference that may cause intentional radiation, provided no changes or undesired operation. modifications are made to the module circuitry. A user’s manual for the finished product should include Changes or modifications could void the user’s the following statement:
   authority to operate the equipment. The end user must This equipment has been tested and found to comply comply with all of the instructions provided by the with the limits for a Class B digital device, pursuant to Grantee, which indicate installation and/or operating part 15 of the FCC Rules. These limits are designed conditions necessary for compliance. to provide reasonable protection against harmful The finished product is required to comply with all interference in a residential installation. This equipapplicable FCC equipment authorizations regulations, ment generates, uses and can radiate radio frerequirements and equipment functions not associated quency energy, and if not installed and used in with the transmitter module portion. For example, accordance with the instructions, may cause harmful compliance must be demonstrated to regulations for interference to radio communications. However, other transmitter components within the host product; there is no guarantee that interference will not occur to requirements for unintentional radiators (Part 15 in a particular installation. If this equipment does Subpart B “Unintentional Radiators”), such as digital cause harmful interference to radio or television devices, computer peripherals, radio receivers, etc.; reception, which can be determined by turning the and to additional authorization requirements for the equipment off and on, the user is encouraged to try to non-transmitter functions on the transmitter module correct the interference by one or more of the follow( i.e., Verification, or Declaration of Conformity) (e.g., ing measures: transmitter modules may also contain digital logic

•  Reorient or relocate the receiving antenna. functions) as appropriate.
•  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. Additional information on labeling and user information requirements for Part 15 devices can be found in KDB
  Publication 784748 available at the FCC Office of Engineering and Technology (OET)

RF EXPOSURE

the module, preceded by the words “Contains All transmitters regulated by FCC must comply with RF transmitter module”, or the word “Contains”, or similar exposure requirements. KDB 447498 General RF wording expressing the same meaning, as follows: Exposure Guidance provides guidance in determining Contains transmitter module IC: 8266A-28133388868. whether proposed or existing transmitting facilities, operations or devices comply with limits for human User Manual Notice for License-Exempt Radio exposure to Radio Frequency (RF) fields adopted by Apparatus (from Section 7.1.3 RSS-Gen, Issue 5, the Federal Communications Commission (FCC). User manuals for license-exempt From the RN2903 FCC Grant: Output power listed is radio apparatus shall contain the following or conducted. This grant is valid only when the module is equivalent notice in a conspicuous location in the user sold to OEM integrators and must be installed by the manual or alternatively on the device or both: OEM or OEM integrators. This transmitter is restricted This device complies with Industry Canada license- for use with the specific antenna(s) tested in this exempt RSS standard(s). Operation is subject to the application for Certification and must not be co-located following two conditions:  this device may not or operating in conjunction with any other antenna or cause interference, and this device must accept transmitters within a host device, except in accordance any interference, including interference that may with FCC multi- transmitter product procedures. cause undesired operation of the device.

APPROVED EXTERNAL ANTENNA
TYPES trie Canada applicables aux appareils radio exempts To maintain modular approval in the United States, only de licence. L’exploitation est autorisée aux deux conthe antenna types that have been tested shall be used. ditions suivantes:  Antenna Types. Transmitter Antenna (from Section 7.1.2 RSS-Gen, Issue 5 (March 2019) User manuals for

HELPFUL WEB SITES

transmitters shall display the following notice in a Federal Communications Commission (FCC): conspicuous location: http://www.fcc.gov Under Industry Canada regulations, this radio transmitter
may only operate using an antenna of a type FCC Office of Engineering and Technology (OET) and maximum (or lesser) gain approved for the trans-

• Laboratory Division Knowledge Database (KDB): mitter by Industry Canada. To reduce potential radio
• https://apps.fcc.gov/oetcf/kdb/index.cfm. interference to other users, the antenna type and its gain should be so chosen that the equivalent isotrop-

APPROVED EXTERNAL ANTENNA

APPROVED EXTERNAL ANTENNA
Issue 5, March 2019): The Australian Communications and Media Authority: The RN2903 module can only be sold or operated with http://www.acma.gov.au/. antennas with which it was approved. Transmitter may be approved with multiple antenna types. An antenna type comprises antennas having similar in-band and out-of-band radiation patterns. Testing shall be performed using the highest gain antenna of each combination of transmitter and antenna type for which approval is being sought, with the transmitter output power set at the maximum level. Any antenna of the same type having equal or lesser gain as an antenna that had been successfully tested with the transmitter, will also be considered approved with the transmitter, and may be used and marketed with the transmitter.
When a measurement at the antenna connector is used to determine RF output power, the effective gain of the device’s antenna shall be stated, based on measurement or on data from the antenna
manufacturer. For transmitters of output power greater than 10 milliwatts, the total antenna gain shall be added to the measured RF output power to demonstrate compliance to the specified radiated power limits.

THE MICROCHIP WEB SITE CUSTOMER SUPPORT
Microchip provides online support via our WWW site at Users of Microchip products can receive assistance www.microchip.com. This web site is used as a means through several channels: to make files and information easily available to

•  Distributor or Representative customers. Accessible by using your favorite Internet browser, the web site contains the following

• Local Sales Officeinformation:

• Field Application Engineer (FAE)

•  Product Support – Data sheets and errata,

•  Technical Support application notes and sample programs, design Customers should contact their distributor, resources, user’s guides and hardware support representative or Field Application Engineer (FAE) for documents, latest software releases and archived support. Local sales offices are also available to help software customers. A listing of sales offices and locations is

•  General Technical Support – Frequently Asked included in the back of this document. Questions (FAQ), technical support requests, Technical support is available through the web site online discussion groups, Microchip consultant at: http://microchip.com/support program member listing

•  Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives
  CUSTOMER CHANGE NOTIFICATION SERVICE
  Microchip’s customer notification service helps keep customers current on Microchip products. Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest. To register, access the Microchip web site at www.microchip.com. Under “Support”, click on “Customer Change Notification” and follow the registration instructions. Note the following details of the code protection feature on Microchip devices:

•  Microchip products meet the specification contained in their particular Microchip Data Sheet.

•  Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

•  Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”
  Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of ourproducts. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such actsallow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.Information contained in this publication regarding device

Trademarks

applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, dsPIC, and may be superseded by updates. It is your responsibility to FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer, ensure that your application meets with your specifications. LANCheck, MediaLB, MOST, MOST logo, MPLAB, MICROCHIP MAKES NO REPRESENTATIONS OR OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC, WARRANTIES OF ANY KIND WHETHER EXPRESS OR SST, SST Logo, SuperFlash and UNI/O are registered IMPLIED, WRITTEN OR ORAL, STATUTORY OR trademarks of Microchip Technology Incorporated in the OTHERWISE, RELATED TO THE INFORMATION, U.S.A. and other countries. INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR The Embedded Control Solutions Company and mTouch are FITNESS FOR PURPOSE.

Microchip disclaims all liability registered trademarks of Microchip Technology Incorporated arising from this information and its use. Use of Microchip in the U.S.A. devices in life support and/or safety applications is entirely at Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo, the buyer’s risk, and the buyer agrees to defend, indemnify and CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit hold harmless Microchip from any and all damages, claims, Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet, suits, or expenses resulting from such use. No licenses are KleerNet logo, MiWi, MPASM, MPF, MPLAB Certified logo, conveyed, implicitly or otherwise, under any Microchip MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code
intellectual property rights. Generation, PICDEM, PICDEM.net, PICkit, PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O, TotalEndurance, TSHARC, USBCheck, VariSense, ViewSpan,
WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademarks of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies.

References

• assistancemicrochip.com
• 📧docerrors@microchip.com
• Smart | Connected | Secure | Microchip Technology
• {波多野42部无码喷潮在线,18禁美女裸身无遮挡免费网站,国产成人精品一区二三区在线观看,久久精品国产亚洲AⅤ无码}
• Microchip Lightning Support
• - K&L electronics GmbH
• fcc.govmitter
• Language selection - Innovation, Science and Economic Development Canada Main Site / Sélection de la langue - Site principal d'Innovation, Sciences et Développement économique Canada
• Facts about towers - Spectrum management and telecommunications
• Empowering Innovation | Microchip Technology
• Welcome to Radio Spectrum Management | Radio Spectrum Management New Zealand
• OET Knowledge Database (KDB)

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>