Friendcom WSN27-915-B-R Module User Manual
- June 9, 2024
- Friendcom
Table of Contents
Friendcom WSN27-915-B-R Module
WSN27-915(B)R
LICENSE-FREE SOLUTION For Sub-1G Frequency Band 915 MHz Wi-SUN 6LoWPAN
RFModule
Embedded Module
Overview
WSN27-915(B)R is a RF module compliant with interoperable Wireless Smart Ubiquitous IoT Network standard as described by IEEE® 802.15.4g/e. It is ideally suited for use as an embedded RF module in one or two-way data links with electricity meters, DA sensor, devices, terminals and concentrators.
BLOCK DIAGRAM
Note: The above block diagram is only used to indicate the internal structure
of the module
PIN DESCRIPTION
INTERFACE PINS DEFINITION
| Pin | Symbol | Name | Definition |
|---|---|---|---|
| 1 | GND | RF Gnd | Connected to power ground |
| 2 | ANT | RF Port | Module RF output, external antenna |
| 3 | GND | RF Gnd | Connected to power ground |
| 4 | RXD1 | Debug UART1 | Module debug serial port data receiving end, connecting |
user data s ending end, RSTTL level, 3.3V
5| TXD1`| Debug UART1| Module debug serial port data sending end, connecting
user data receiving end, RSTTL level, 3.3V
6| RXD0| APP UART0| The module communicates with the data receiving end of the
serial port of the external device and connects with the user data sending
end, with RSTTL level of 3.3V
7| ****
TXD0
| ****
APP UART0
| The module communicates with the data sending end of the serial port of the
external device and connects with the user data receiving end, with RSTTL
level of 3.3V
8| GND| Power Gnd| External power supply cathode
9| +3.3V| Power supply| External power supply positive pole, voltage 3.3V,
power supply load current at least 1A
10| IOA7| Communication Indicator| Low level when sending data, external LED
indicator
11| IOA6| Communication Indicator| Low level when receiving data, external LED
indicator
12| Boot| Startup control| Start mode selection, internal is pulled down,
embedded flash boot when Boot=0, Boot=1 internal ROM boot,
13| RESET| Reset| Reset RF module at low level
14| IOE4| Communication| Network indication, output low level, external LED
indicator
| | Indicator|
15| TXD5| IO Port| Expansion port, connecting SRAM HOLD pin of external
equipment
16| RXD5| IO Port| Expansion port, connecting SRAM WP pin of external
equipment
17| MODE| Mode Select| Internal pull-up, MODE=0: Debug mode MODE=1: Normal
mode
18| SWIO| IO Port| Data signal of debug port
19| SWCLK| IOPort| Clock signal of debug port
20| GND| Power Gnd| Connect to power ground
21| TXD4| IO Port| NC, extended standby
22| RXD4| IO Port| NC, extended standby
23| SDA| IO Port| NC, extended standby
24| SCL| IO Port| NC, extended standby
25| SPIMOSI| IO Port| Connect SPI of external equipment MOSI pin
26| SPIMISO| IO Port| Connect SPI of external equipment MISO pin
27| SPICLK| IO Port| Connecting SPI of external equipment CLK foot
28| SPICSN| IO Port| Connecting SPI of external equipment CSN pin
29| IOB8| IO Port| SRAM CSN, connect CS pin of external SRAM
30| GND| Power Gnd| Power supply ground
31| +5V| Power Supply| Positive pole of power supply, PA power supply, the
load current of power supply is required to be at least 1A
32| GND| Power Gnd| Power supply ground
SIZE DESCRIPTION
The specific dimensions of the module are shown in the figure below
SCHEMATIC DESIGN
At the periphery of RF module, a 1206 packaged magnetic bead M1 and filter
capacitor shall be connected in series to the 5 V power supply interface, and
L2, C18 and C19 constitute the antenna port matching circuit.
Debug Interface as follows.
LED indication, plus PSRAM (increase node capacity) schematic diagram is
as follows.
Antenna port
The WSN27-915(B)R communication module is encapsulated by the patch. The user PCB board should leave an antenna port. The user configures the appropriate antenna according to the actual application. The antenna port is impedance of 50Ohm and connected to the external antenna of 50 Ohm.
Antenna Design
The Wi-SUN RF module is packaged in a stamp hole patch. All I/O ports and antenna ports need to be led out from the user board. Suggested RF signal routing: PCB Layout RF routing between the module and the antenna is required to be 50 Impedance rule design, and trace length as short as possible. Since the impedance cannot be controlled, it is recommended that the impedance line width be 0.8-1mm when routing the PCB Layout, and the distance between the surrounding grounding copper foil be 1-1.5 times the line width. Ground vias to ensure that the grounding impedance is as small as possible. Keep the RF port away from all sources of interference, especially high-speed digital signals and switching power supplies, otherwise the receiving sensitivity of the module will be reduced.
If a long trace is used, a matching network needs to be added in the middle,
as shown in the figure below.
In order to reduce the reduction of the antenna performance caused by the
parasitic capacitor caused by the RF pad, the first and second layers of the
module radio frequency port pads are recommended to be hollowed out, as shown
in the figure below.
The method of outer radiation frequency feed cable or IPEX welding is
connected to the module, but it is necessary to ensure the sufficientness of
the welding and prevent excessive cable damage from affecting the radio
frequency performance of the module. The effect diagram of the two connection
methods is shown in the figure below.
The antenna used in the module must meet the equipment standards. The Bobby should be between 1.1 and 1.5, the input impedance is 50, the use environment is different, and the gain requirements for the antenna are also different. Generally, the greater the internal gain, the more foreign gain, the gain of the external gain, The smaller, the better the antenna performance
Notice: Check the stick external antenna specification for details.
TECHNICAL SPECIFICATION
| No. | Parameters Index | Value Description |
|---|---|---|
| 1 | Chip set | Cortex-M3 MCU, 512 KB Flash, 128 KB SRAM, sub-GHz radio |
| 2 | Operating Frequency | 902-928MHz |
| 3 | Data Modulation | GMSK |
| 4 | Operating Mode | RF channel hopping |
| 5 | Number of Channels (50 Kbps) | 129 |
| 6 | Interfaces | Application UART & Debug UART,115200-8-n-1 |
| 7 | Main Host Operating Voltage | 3.3V ±10% |
| 8 | Radio PA Operating Voltage | 5V±10% or 3.3V ±10% |
| 9 | RF Receive Current | 40mA |
| 10 | Operating Temperature Range | -40℃ ～ +70℃ |
| 11 | Mechanical Dimension | 24×18×3 mm |
RADIO SPECIFICATION
Frequency (MHz)| Wi-SUN PHY Mode| **** Data Rate| Modulation| Modulation
Index| No. of Channels| Channel Spacing(KHz)
---|---|---|---|---|---|---
902-928MHz| 3| 50kbps| 2GFSK| 1| 129| 200
FREQUENCY MAPPING
Channel Definitions is as the following table:
No.| Frequency Center (MHz)| No.| Frequency Center (MHz)|
No.
| Frequency Center (MHz)| No.| Frequency Center (MHz)
---|---|---|---|---|---|---|---
1| 902.2| 16| 905.2| 31| 908.2| 46| 911.2
2| 902.4| 17| 905.4| 32| 908.4| 47| 911.4
3| 902.6| 18| 905.6| 33| 908.6| 48| 911.6
4| 902.8| 19| 905.8| 34| 908.8| 49| 911.8
5| 903.0| 20| 906.0| 35| 909.0| 50| 912.0
6| 903.2| 21| 906.2| 36| 909.2| 51| 912.2
7| 903.4| 22| 906.4| 37| 909.4| 52| 912.4
8| 903.6| 23| 906.6| 38| 909.6| 53| 912.6
9| 903.8| 24| 906.8| 39| 909.8| 54| 912.8
10| 904.0| 25| 907.0| 40| 910.0| 55| 913.0
11| 904.2| 26| 907.2| 41| 910.2| 56| 913.2
12| 904.4| 27| 907.4| 42| 910.4| 57| 913.4
13| 904.6| 28| 907.6| 43| 910.6| 58| 913.6
14| 904,8| 29| 907,8| 44| 910,8| 59| 913,8
15| 905.0| 30| 908.0| 45| 911.0| 60| 914.0
No.| Frequency Center (MHz)| No.| Frequency Center (MHz)|
No.
| Frequency Center (MHz)| No.| Frequency Center (MHz)
61| 914.2| 76| 917.2| 91| 920.2| 106| 923.2
62| 914.4| 77| 917.4| 92| 920.4| 107| 923.4
63| 914.6| 78| 917.6| 93| 920.6| 108| 923.6
64| 914.8| 79| 917.8| 94| 920.8| 109| 923.8
65| 915.0| 80| 918.0| 95| 921.0| 110| 924.0
66| 915.2| 81| 918.2| 96| 921.2| 111| 924.2
67| 915.4| 82| 918.4| 97| 921.4| 112| 924.4
68| 915.6| 83| 918.6| 98| 921.6| 113| 924.6
69| 915.8| 84| 918.8| 99| 921.8| 114| 924.8
70| 916.0| 85| 919.0| 100| 922.0| 115| 925.0
71| 916.2| 86| 919.2| 101| 922.2| 116| 925.2
72| 916.4| 87| 919.4| 102| 922.4| 117| 925.4
73| 916.6| 88| 919.6| 103| 922.6| 118| 925.6
74| 916,8| 89| 919,8| 104| 922,8| 119| 925,8
75| 917.0| 90| 920.0| 105| 923.0| 120| 926.0
No.| Frequency Center (MHz)| No.| Frequency Center (MHz)|
No.
| Frequency Center (MHz)| No.| Frequency Center (MHz)
---|---|---|---|---|---|---|---
121| 926.2| | | | | |
122| 926.4| | | | | |
123| 926.6| | | | | |
124| 926.8| | | | | |
125| 927.0| | | | | |
126| 927.2| | | | | |
127| 927.4| | | | | |
128| 927.6| | | | | |
129| 927.8| | | | | |
RX SENSITIVITY
-108dBm@50KbpsPER=10
Shenzhen Friendcom Technology Co.,Ltd. 5th-6th Floor, 17 Building, Guangqian
Industrial Park, Xili Town, Nanshan District, Shenzhen, 518055, China
This equipment complies with the FCC RF radiation exposure limits set forth
for an uncontrolled environment. This equipment should be installed and
operated with a minimum distance of 20cm between the radiator and any part of
your body.
FCC Statement
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.
FCC Radiation Exposure Statement This modular complies with FCC RF radiation
exposure limits set forth for an uncontrolled environment. This equipment
should be installed and operated with a minimum distance of 20cm between the
radiator and your body.
Shenzhen Friendcom Technology Development Co., Ltd./ADS-BLEnRF1-ANT902 MHz –
928 MHz: 2dBi(declare by Applicant)
Compliance list INTEGRATION INSTRUCTIONS for 996369 D03 OEM the and 996369 D03 OEM by Sections 2.2 through 2.12.
| Requirement | Yes | N/A | Comment |
|---|
2.2 List of applicable FCC rules
List the FCC rules that are applicable to the modular transmitter. These are the rules that specifically establish the bands of operation, the power, spurious emissions, and operating fundamental frequencies. DO NOT list compliance to unintentional-radiator rules (Part 15 Subpart B) since that is not a condition of a module grant that is extended to a host manufacturer. See also Section 2.10 below concerning the need to notify host manufacturers that further testing is required.3
| YES| | FCC standards: FCC CFR Title 47 Part 15 Subpart C Section
15.247
2.3 Summarize the specific operational use conditions
Describe use conditions that are applicable to the modular transmitter, including for example any limits on antennas, etc. For example, if point-to- point antennas are used that require reduction in power or compensation for cable loss, then this information must be in the instructions. If the use condition limitations extend to professional users, then instructions must state that this information also extends to the host manufacturer’s instruction manual. In addition, certain information may also be needed, such as peak gain per frequency band and minimum gain, specifically for master devices in 5 GHz DFS bands.
| YES| | Glue stick antenna with antenna gain 2dBi
2.4 Limited module procedures
If a modular transmitter is approved as a “limited module,” then the module
manufacturer is responsible for approving the host environment that the
limited module is used with. The manufacturer of a limited module must
describe, both in the filing and in the installation instructions, the
alternative means that the limited module manufacturer uses to verify that the
host meets the necessary requirements to satisfy the module limiting
conditions.
A limited module manufacturer has the flexibility to define its alternative
method to address the conditions that limit the initial approval, such as:
shielding, minimum
| | N/A| Not applicable
signaling amplitude, buffered modulation/data inputs, or power supply
regulation. The alternative method could include that the limited module
manufacturer reviews detailed test data or host designs prior to giving the
host manufacturer approval.
This limited module procedure is also applicable for RF exposure
evaluation when it is necessary to demonstrate compliance in a specific host.
The module manufacturer must state how control of the product into which the
modular transmitter will be installed will be maintained such that full
compliance of the product is always ensured. For additional hosts other than
the specific host originally granted with a limited module, a Class II
permissive change is required on the module grant to register the
additional host as a specific host also approved with the module.| | **|
2.5 Trace antenna designs
For a modular transmitter with trace antenna designs, see the guidance in
Question 11 of
KDB Publication 996369 D02 FAQ – Modules for Micro-Strip Antennas and
traces. The integration information shall include for the TCB review the
integration instructions for the following aspects: layout of trace design,
parts list (BOM), antenna, connectors, and isolation requirements.4
****a) Information that includes permitted variances (e.g., trace
boundary limits, thickness, length, width, shape(s), dielectric constant, and
impedance as applicable for each type of antenna);
b) Each design shall be considered a different type (e.g., antenna
length in multiple(s) of frequency, the wavelength, and antenna shape (traces
in phase) can affect antenna gain and must be considered);
c) The parameters shall be provided in a manner permitting host
manufacturers to design the printed circuit (PC) board layout;
d) Appropriate parts by manufacturer and specifications;
e) Test procedures for design verification; and compliance.| |
N/A| Not applicable
The module grantee shall provide a notice that any deviation(s) from the
defined parameters of the antenna trace, as described by the instructions,
require that the host product manufacturer must notify the module grantee that
they wish to change the antenna trace design. In this case, a Class II
permissive change application is required to be filed by the grantee, or the
host manufacturer can take responsibility through the change in FCC ID (new
application) procedure followed by a Class II permissive change
application.| | **|
2.6 RF exposure considerations
It is essential for module grantees to clearly and explicitly state the
RF exposure conditions that permit a host product manufacturer to use the
module. Two types of instructions are required for RF exposure
information: (1) to the host product manufacturer, to define the application
conditions (mobile, portable – xx cm from a person’s body); and (2)
additional text needed for the host product manufacturer to provide to end
users in their end-product manuals. If RF exposure statements and use
conditions are not provided, then the host product manufacturer is required to
take responsibility of the module through a change in FCC ID (new
application).| YES| **| This modular complies with FCC RF 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.
2.7 Antennas
A list of antennas included in the application for certification must be
provided in the instructions. For modular transmitters approved as limited
modules, all applicable professional installer instructions must be included
as part of the information to the host product manufacturer. The antenna list
shall also identify the antenna types (monopole, PIFA, dipole, etc. (note that
for example an “omni-directional antenna” is not considered to be a specific
“antenna type”)).
For situations where the host product manufacturer is responsible for an
external connector, for example with an RF pin and antenna trace design,
the integration instructions shall inform the installer that| YES| **|
Glue stick antenna with antenna gain 2dBi
unique antenna connector must be used on the Part 15 authorized
transmitters used in the host product. The module manufacturers shall
provide a list of acceptable unique connectors.| | **|
2.8 Label and compliance information Grantees are responsible for the
continued compliance of their modules to the FCC rules. This includes advising
host product manufacturers that they need to provide a physical or e-label
stating “Contains FCC ID” with their finished product.| YES| **| If the
FCC identification number is not visible when the module is installed inside
another device, then the outside of the device into which the module is
installed must also display a label referring to the enclosed module. This
exterior label can use wording such as the following:
“Contains Transmitter Module FCC ID: UU3FC-3902-915 Or Contains FCC ID:
UU3FC-3902-915
2.9 Information on test modes and additional testing requirements5
Additional guidance for testing host products is given in KDB Publication
996369 D04 Module Integration Guide. Test modes should take into consideration
different operational conditions for a stand-alone modular transmitter in a
host, as well as for multiple simultaneously transmitting modules or other
transmitters in a host product.
The grantee should provide information on how to configure test modes for
host product evaluation for different operational conditions for a stand-alone
modular transmitter in a host, versus with multiple, simultaneously
transmitting modules or other transmitters in a host.
Grantees can increase the utility of their modular transmitters by
providing special means, modes, or instructions that simulates or
characterizes a connection by enabling a transmitter. This can greatly
simplify a host manufacturer’s determination that a module as installed in a
host complies with FCC requirements.| YES| **| The modular transmitter
has been fully tested by the module grantee on the required number of
channels, modulation types, and modes, it should not be necessary for the host
installer to re-test all the available transmitter modes or settings.
2.10 Additional testing, Part 15 Subpart B disclaimer
The grantee should include a statement that the modular transmitter is
only FCC authorized for the specific rule parts (i.e., FCC transmitter rules)
listed on the grant, and that the host product manufacturer is responsible|
YES| **| Refer to instruction
Any company of the host device which install this modular with limit modular
approval should perform the test of radiated & conducted emission and spurious
emission,etc. according to FCC part 15B : 15107 and 15.109, 15B Class B
requirement, Only if the test result comply with FCC part 15B : 15.107 and
15.109, 15B Class B requirement，then the host can be sold legally.
for compliance to any other FCC rules that apply to the host not covered by
the modular transmitter grant of certification. If the grantee markets their
product as being Part 15 Subpart B compliant (when it also contains
unintentional-radiator digital circuity), then the grantee shall provide a
notice stating that the final host product still requires Part 15 Subpart B
compliance testing with the modular transmitter installed.| | ****| When
the module is installed inside another device, the user manual of the host
must contain below warning statements;
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.
2.11 Note EMI Considerations
Note that a host manufacture is recommended to use D04 Module Integration Guide recommending as “best practice” RF design engineering testing and evaluation in case non-linear interactions generate additional non- compliant limits due to module placement to host components or properties
For standalone mode, reference the guidance in D04 Module Integration Guide and for simultaneous mode7; see D02 Module Q &A Question 12, which permits the host manufacturer to confirm compliance.
| YES| **| Note: host manufacture is recommended to use D04 Module
Integration Guide recommending as “best practice” RF design engineering
testing and evaluation in case non-linear interactions generate additional
non-compliant limits due to module placement to host components or properties
For standalone mode, reference the guidance in D04 Module Integration Guide
and for simultaneous mode7; see D02 Module Q&A Question 12, which permits the
host manufacturer to confirm compliance.
2.12 How to make changes Since . only Grantees are permitted to make
permissive changes, it is recommended that module manufactures provide contact
information and some guidance to host providers in the integration
instructions if they expect their module will be used differently than
granted.**| YES| | only Grantees are permitted to make permissive changes.
IC STATEMENT
This device contains licence-exempt transmitter(s)/receiver(s) that comply
with Innovation, Science and Economic
Development Canada’s licence-exempt RSS(s). Operation is subject to the
following two conditions: (1) This device may not cause interference.
(2) This device must accept any interference, including interference that may
cause undesired operation of the device
