WT5518 LoRa Module
WT5518 integrates Semtech RF transceiver chip SX1276, which adopts LoRa Spread Spectrum modulation frequency hopping technique. Compare with the FSK and GFSK module, The WT5518 has extremely low X sensitivity to improve link performance. It can be widely used in wireless meter reading, remote industrial control filed.
- Frequency Range：915MHz
- Sensitivity up to -126dBm
- Maximum output power：18dBm±1dB
- Follow FCC15.247
- 1.8-3.7 V Power supply
- Ultra-low consumption shut down mode
- Digital received signal strength indicator(RSSI)
- Configurable data packet structure
- Operating Temperature Range：-40 ~ +85°C
- Automated Meter Reading
- Home and Building Automation
- Wireless Alarm and Security Systems
- Industrial Monitoring and Control
- Long range Irrigation Systems
Test Conditions: TA = 25°C, 3.3V, Fc = 915 MHz
|Date Rate||0.18-37.5kbps2||Working at LoRa Mode|
|RX Sensitivity||-134dBm4||BW=250K, SF=12|
|Working Voltage||1.8 ~3.7V|
|Pin Name||Pin Type||Pin Description|
|nRESET||Input||Reset input, Keep low|
|DIO0||Input /output||Digital I/O,|
|DIO1||Input /output||Digital I/O,|
|DIO2||Input /output||Digital I/O,|
|DIO3||Input /output||Digital I/O,|
|DIO4||Input /output||Digital I/O,|
|DIO5||Input /output||Digital I/O,|
|SCK||Input||Serial clock for SPI|
|MISO||Output||Date Output for SPI|
|MOSI||Input||Date input for SPI|
|NSS||Input||Chip select for SIP|
|ANT||ANT port||Connect with 50 ohm antenna|
|Type||Helical Spring Antenna|
|standing-wave ratio (SWR)||<2|
|The Max Input Power||2 W|
Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01
2.2 List of applicable FCC rules
FCC Part 15 Subpart C 15.247 & 15.207 & 15.209
2.3 Specific operational use conditions
The module is a module with LoRa functions.
- Operation Frequency: 902-928MHz
- Number of Channel: 1
- Modulation: FSK/GFSK/MSK/GMSK/LoRa/OOK
- Type: Helical Spring Antenna
- Gain: 0 dBi Max.
The module can be used for mobile or portable applications with a maximum 0dBi antenna. The host manufacturer installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation of the FCC rules, including the transmitter operation. The host manufacturer has to be aware not to provide information to the end-user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. The end-user manual shall include all required regulatory information/warning as shown in this manual.
2.4 Limited module procedures
Applicable. The module is a Limited Single module and complies with the requirement of FCC Part 15.212. The product is a limited module. Since there is no shielding
g shell, no permanently attached antenna, and does not contain an independent power supply adjustment, C2PC, or New FCC ID certification procedures are required when the module is placed in the host device.
2.5 Trace antenna designs
Not applicable. The module has its own antenna and doesn’t need a host’s printed board microstrip trace antenna, etc.
2.6 RF exposure considerations
The module must be installed in the host equipment such that at least 20cm is maintained between the antenna and users’ body; and if RF exposure statement or module layout is changed, then the host product manufacturer is required to take responsibility for the module through a change in FCCID or new application. The FCC ID of the module cannot be used on the final product. In these circumstances, the host manufacturer will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.
Antenna Specification are as follows:
Type: Helical Spring Antenna
Gain: 0 dBi
This device is intended only for host manufacturers under the following
conditions: The transmitter module may not be co-located with any other transmitter or antenna; the module shall be only used with the internal antenna(s) that has been originally tested and certified with this module. The antenna must be either permanently attached or employ a ‘unique ‘antenna coupler. As long as the conditions above are met, further transmitter tests will not be required. However, the host manufacturer is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.).
2.8 Label and compliance information
Host product manufacturers need to provide a physical or e-label stating “Contains FCC ID: 2AYSD_WT5518” with their finished product.
2.9 Information on test modes and additional testing requirements
Host manufacturer must perform a test of radiated & conducted emission and spurious emission, etc. According to the actual test modes for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product. Only when all the test results of test modes comply with FCC requirements, then the product can be sold legally.
2.10 Additional testing, Part 15 Subpart B disclaimer
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 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 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.
Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Radiation 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 transmitter.
– This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body.
Information for the OEMs and Integrators
The following statement must be included with all versions of this document supplied to an OEM or integrator, but should not be distributed to the end user.
1) This device is intended for OEM integrators only.
2) Please see the full Grant of Equipment document for other restrictions installed .
In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.
Documents / Resources
|Shanghai Wendtech Information Technology WT5518 LoRa Module [pdf] Instructions|
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