1. Introducció i finalview
The Waveshare SX1262 LoRa Node Module is an expansion board specifically designed for the Raspberry Pi Pico. It integrates the SX1262 LoRa chip, providing long-range, low-power wireless communication capabilities. This module supports the LoRaWAN protocol, operating in the EU868 frequency band, making it suitable for various IoT applications requiring robust and efficient data transmission.
Key features include a standard Raspberry Pi Pico header for direct attachment, a PH1.25 battery connector with a recharge controller for portable use, and two LED indicators to monitor the module's operational status. Development resources and example code (in C) are provided to assist users in integration and programming.
Image 1.1: The Waveshare SX1262 LoRa Node Module shown with its typical accessories, including an antenna, a LiPo battery, and an IPEX to SMA adapter cable.
2. Característiques
- Standard Raspberry Pi Pico header for direct compatibility with Raspberry Pi Pico series boards.
- Supports LoRaWAN protocol and specifically the EU868 frequency band.
- Integrated PH1.25 battery connector and recharge controller, enabling the use of rechargeable Lithium batteries.
- Two LED indicators for clear monitoring of the module's operating status.
- Comes with comprehensive development resources and a manual, including C language examples.
- Utilizes the SX1262 chip, offering robust block resistance and ultra-long communication distance.
- Supports FSK, GFSK, and LoRa modulations.
- High receiving sensitivity (up to -148dBm) and programmable emitting power (up to 22dBm).
- Supports preamble detection, with CRC, up to 256 bytes data packet engine.
3. Què hi ha a bord
This section details the main components and their functions on the SX1262 LoRa Node Module.
Image 3.1: Detailed diagram highlighting key components on the SX1262 LoRa Node Module, including the Raspberry Pi Pico header, status indicators, RF switch control, SX1262 module, recharge IC, IPEX antenna connector, power switch, and PH1.25 battery header.
- Raspberry Pi Pico header: Standard female header for connecting to a Raspberry Pi Pico.
- Indicadors d'estat: PWR (power) and CHG (recharge) LEDs.
- RF switch control: Pins A and B, controlled by high level and GPIO22 respectively.
- MCP73831 recharge IC: Manages battery charging.
- SX1262 module: The core LoRa communication chip.
- IPEX 1 antenna connector: For connecting the external antenna.
- Interruptor d'alimentació: Controls power to the module.
- Capçalera de la bateria PH1.25: Connector for a rechargeable Lithium battery.
4. Configuració i instal·lació
4.1 Connecting to Raspberry Pi Pico
The SX1262 LoRa Node Module is designed for direct attachment to a Raspberry Pi Pico. Ensure correct orientation and alignment of the pins before gently pressing the Pico onto the module's female header.
Image 4.1: Illustration of a Raspberry Pi Pico correctly connected to the SX1262 LoRa Node Module. The Raspberry Pi Pico is not included with the module.
4.2 Connexió de l'antena
Connect the provided antenna to the IPEX 1 connector on the module. For optimal performance, ensure the antenna is securely attached.
4.3 Connexió de la bateria (opcional)
If using a rechargeable Lithium battery, connect it to the PH1.25 battery header. The module includes a recharge controller for managing battery charging when powered via USB.
5. Pinout Definition
Understanding the pinout is crucial for proper integration and programming. The following diagram illustrates the pin assignments for the SX1262 LoRa Node Module.
Image 5.1: Detailed pinout diagram for the SX1262 LoRa Node Module, showing connections for power, ground, and various GPIO pins used for LoRa communication (BUSY, CS, CLK, MOSI, MISO, RESET, DIO1) and battery voltage detecció.
| Nom del pin | Funció |
|---|---|
| VSYS | Font d'alimentació de 5 V |
| 3V3 | Font d'alimentació 3V3 |
| GND | Terra |
| GP2 (LoRa_BUSY) | SX1262 BUSY pin |
| GP3 (LoRa_CS) | SX1262 chip select |
| GP10 (LoRa_CLK) | SX1262 CLK pin |
| GP11 (LoRa_MOSI) | SX1262 MOSI pin |
| GP12 (LoRa_MISO) | SX1262 MISO pin |
| GP15 (LoRa_RESET) | SX1262 RESET pin |
| GP20 (DIO1) | SX1262 DIO1 pin |
| GP26 (BAT_AD) | Bateria voltage detecció |
6. Instruccions de funcionament
To operate the SX1262 LoRa Node Module, you will need to program your Raspberry Pi Pico with appropriate firmware. Waveshare provides development resources and example code (typically in C) to facilitate this process. These resources usually include libraries for interacting with the SX1262 chip and examples for sending and receiving LoRa packets, as well as integrating with LoRaWAN networks like The Things Network (TTN).
Refer to the official Waveshare documentation and example code for detailed programming instructions. Ensure your development environment is correctly set up for Raspberry Pi Pico programming.
6.1 Engegada del mòdul
- When connected to a Raspberry Pi Pico, the module draws power from the Pico.
- If a LiPo battery is connected to the PH1.25 header, the module can be powered independently or charged via the Pico's USB connection.
- The PWR LED indicates power status, and the CHG LED indicates battery charging status.
6.2 LoRa Communication
The SX1262 chip handles the LoRa modulation and demodulation. Your software on the Raspberry Pi Pico will control the SX1262 via the SPI interface and GPIO pins as defined in the pinout. This includes setting frequency, spreading factor, bandwidth, and managing data transmission and reception.
7. Aplicació Examples
The SX1262 LoRa Node Module is suitable for a wide range of low-power, long-range communication applications. Common uses include industrial control, smart home systems, and data acquisition in remote environments.
Image 7.1: Conceptual diagram illustrating various application examples for LoRa nodes, including industrial control (valves, blowers), smart home (air conditioners, water meters, alarms, illumination, curtain motors), and environmental monitoring, all communicating through a concentrator/gateway to a server via MQTT/HTTP protocols.
8. Especificacions
Detailed technical specifications for the Waveshare SX1262 LoRa Node Module.
| Paràmetre | Valor |
|---|---|
| Dimensions del producte | 2.05 x 0.83 x 0.83 polzades (52.00 x 21.00 x 21.00 mm) |
| Número de model de l'article | Pico-LoRa-SX1262 |
| Marca | Waveshare |
| Dispositius compatibles | Raspberry Pi Pico |
| Processadors compatibles | RP2040 |
| Tipus de xipset | SX1262 |
| Tipus de connector d'alimentació principal | USB (via Pico) |
| Vol. Operatiutage | 3.3 V |
| Bus de comunicació | SPI |
| Temperatura de funcionament | -40 ~ 85 °C |
| Paràmetre | 433MHz Band (410-525MHz) | 868MHz Band (863-870MHz) | 915MHz Band (902-930MHz) |
|---|---|---|---|
| RFID | SX1262 | ||
| Potència d'emissió | 22dBm (MAX) | ||
| Emitting Current | 107mA@22dBm | 118mA@22dBm | (Not specified for 915MHz) |
| Corrent de recepció | 5.3mA@125KHz | ||
| Modulació | LoRa/(G)FSK | ||
Image 8.1: Outline dimensions of the SX1262 LoRa Node Module in millimeters.
9. Solució De Problemes
- El mòdul no s'encén:
- Ensure the Raspberry Pi Pico is correctly seated and powered.
- If using a battery, verify it is charged and correctly connected to the PH1.25 header.
- Check the power switch on the module is in the 'ON' position.
- No LoRa communication:
- Verify the antenna is securely connected to the IPEX 1 connector.
- Confirm that your software on the Raspberry Pi Pico is correctly configured for the SX1262 chip and the EU868 frequency band.
- Check SPI connections and GPIO pin assignments in your code against the pinout diagram.
- Ensure both transmitting and receiving devices are within range and configured to the same LoRa parameters (frequency, spreading factor, bandwidth).
- La bateria no es carrega:
- Ensure the Raspberry Pi Pico is powered via USB.
- Verify the battery is correctly connected to the PH1.25 header.
- Check the CHG LED for charging status indication.
10. Manteniment
- Mantingueu el mòdul en un lloc sec per evitar danys per humitat.
- Eviteu exposar el mòdul a temperatures extremes o a la llum solar directa.
- Manipuleu el mòdul amb cura per evitar danys físics als components o connectors.
- Regularly check for firmware updates from Waveshare to ensure optimal performance and access to new features.
11. Garantia i Suport
For warranty information, technical support, and additional resources, please refer to the official Waveshare website or contact their customer service directly. Detailed documentation, example code, and community forums are typically available to assist with development and troubleshooting.
Fabricant: Waveshare
Weblloc: www.waveshare.com (Si us plau, consulteu la informació oficial) website for the most current support information and contact details.)
