SX126xDVK1xAS

The SX1261DVK1BAS, the SX1262DVK1CAS and the SX1262DVK1DAS are fitted with the SX126x transceiver device family (SX1261, SX1262 or SX1268) which, added to a high-performance FSK / OOK RF transceiver modem, features the LoRa® long range modem.

Hello World

Import programSX126xDevKit

Source code for the SX126xDVK1xAS Dev Kit. This example code has only been tested on the Nucleo L476RG

Library

Import librarySX126xLib

SX1261 and sx1262 common library

Pinout

Datasheet

https://www.semtech.com/uploads/documents/DS_SX1261-2_V1.1.pdf

Notes

Each SX126xDVK1xAS kit contains:
• 2x SX126xMB1xAS RF Component Shield (for mbed development – see part numbers available below)
• 2x ST NUCLEO-L476RG platform
• 2x DM-TFT28-105 Touch Display
• 2x Accessory set (Antenna, Mini-USB cable, Touch Screen Stylus)

Additional Application Code and Library Examples can be found toward the bottom of this page



SX126x mbed Component Shield

Overview

The SX1261 and SX1262 sub-GHz radio transceivers are ideal for long range wireless applications. Both devices are designed for long battery life with just 4.6mA of active receive current consumption. The SX1261 can transmit up to +15 dBm and the SX1262 can transmit up to +22 dBm with highly efficient integrated power amplifiers. These devices support LoRa® modulation for LPWAN use cases and (G)FSK modulation for legacy use cases. The devices are highly configurable to meet different application requirements utilizing the global LoRaWAN standard or proprietary protocols. The devices are designed to comply with the physical layer requirements of the LoRaWAN specification released by the LoRa Alliance. The device also support high performance (G)FSK modes for systems including WMBus, IEEE802.15.4g. The SX126x delivers exceptional phase noise, selectivity, receiver linearity and IIP3 for significantly lower current consumption than competing devices. The SX126x is intended for applications over a wide frequency range and is providing continuous frequency coverage, including all available sub-GHz frequency bands (168MHz, 433MHz, 470MHz, 780 MHz, 868MHz, 915MHz and 923MHz). The SX126x really offers the possibility of two modems in one single package and complies with both ETSI and FCC regulatory requirements.

LoRa® Modulation

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LoRa®, Semtech’s proprietary modulation is a spread-spectrum technique that uses wideband linear frequency modulated pulses to encode information, whose frequency increases or decreases over a certain amount of time. As with other spread-spectrum modulation techniques, LoRa® uses the entire channel bandwidth to broadcast a signal, making it robust to channel noise. In addition, because LoRa® modulation uses a broad band of the spectrum, it is also resistant to long term relative frequency error, multi-path, fading and Doppler effects.

Connectivity

The SX1261MBxAS and SX1262MB1xAS are controlled through the SPI bus at a maximum speed of 16Mbps. The connections are identical on each board so that the same software can used on any boards. All “Pass through” pins are not used in the operations of the SX126xDVK1xAS boards and can therefore be used in connections of other boards for various purposes. The I2C and UART have especially been let free so that a variety of sensor can be connected to the boards, and thus enable long distance control of them.

SX126xMB1xASMBED Pin
SCKD13
MISOD12
MOSID11
NSSD7
ANT_SWD8
DIO1D5
BUSYD3
XTAL_SEL1A3
DEVICE_SEL2A2
FREQ_SEL3A1
NRESETA0

1This pins is used to indicate if the SX126x board is fitted with a TCXO or a standard XTAL (0: TCXO, 1: XTAL).

2This pins is used to indicate if the device mounted on the board is a SX1261 or the SX1262 (0: SX1262, 1: SX1261).

3This pins is used to indicate the board matching frequency (0: 915 MHz, 1: 868 MHz)

List of mbed shield included SX126xDVK1xAS kits (single RF Shield not available for ordering – only kits):

SX1261DVK1BAS
The SX1261MB1BAS shield is especially designed for ISM frequency band available in Europe at 868 MHz (+14dBm; XTAL).

SX1261DVK1CAS
The SX1261MB1CAS shield is especially designed for ISM frequency band available in Asia at 923 MHz (+14dBm; XTAL).

SX1262DVK1CAS
The SX1262MB1CAS shield is especially designed for ISM frequency band available in North America at 915 MHz (+22dBm; XTAL).

SX1262DVK1DAS
The SX1262MB1DAS shield is especially designed for ISM frequency band available in India at 866 MHz (+22dBm; TCXO).

SX1262DVK1PAS
The SX1262MB1PAS shield is especially designed for ISM frequency band available in Australia and North America at 915/923 MHz (+22dBm; TCXO).

Where to buy

Only the SX1262DVK1CAS is actually available from distribution on Digi-Key. Others SX1261DVK1xAS and SX1262DVK1xAS listed below are only available from local distributor, sales rep. or Semtech sales office directly.

SX1262DVK1CAS:
Online Distribution


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