1. Introduktion
The Stemedu WiFi LoRa 32 V3 is a versatile IoT development board integrating Wi-Fi, Bluetooth Low Energy (BLE), and LoRa communication capabilities. It features a 0.96-inch OLED display and 8MB of flash memory, making it suitable for a wide range of applications, particularly those requiring long-range, low-power wireless communication. This manual provides essential information for setting up, operating, and maintaining your development board.
2. Pakkens indhold
Når du åbner din pakke, skal du sørge for, at alle følgende varer er til stede:
- 1x LoRa Development Board
- 1x U.FL IPEX to SMA Connector LoRa Antenna
- 2x Pin Headers (for soldering)
- 1x Battery Connector Cable (red/black wires)
The package includes the main development board, a LoRa antenna for wireless communication, pin headers for easy integration into breadboards or custom circuits, and a battery cable for power connection.
3. Produktet er slutview
The LoRa 32 V3 board is designed for ease of use and integration. Below are diagrams highlighting its key components and pinout.
3.1. Komponentlayout
The board features a Type-C USB port for power and data, a 0.96-inch OLED display for visual feedback, a programming/user button, a reset button, power and signal indicator LEDs, a WiFi antenna, a LoRa antenna IPEX port, an ESP32-S3FN8 chip, a CP2102 chip, and a 2P 1.25 Lithium battery interface.
3.2. Pinout-diagram
The pinout diagram illustrates the arrangement of GPIOs, power, ground, ADC/DAC, and serial communication pins on Headers J2 and J3. This information is crucial for connecting external sensors, actuators, and other components.
3.3. Dimensioner
The board dimensions are approximately 52mm (2.04in) in length and 25.5mm (0.98in) in width, with a thickness of about 9.74mm. These measurements are important for designing custom enclosures or integrating the board into existing projects.
4. Opsætning
4.1. Antennetilslutning
Connect the provided LoRa antenna to the IPEX port on the board. Ensure a secure connection to maximize signal strength and range. The board also has an integrated WiFi antenna.
4.2. Strømforsyning til bestyrelsen
The board can be powered via the Type-C USB interface or through the 2P 1.25 Lithium battery interface. It includes a complete voltage regulator, ESD protection, short circuit protection, and RF shielding.
When using a battery, ensure correct polarity. The board is designed to manage Li-Po batteries.
5. Betjeningsvejledning
5.1. Meshtastic Compatibility
The LoRa 32 V3 board is compatible with Meshtastic, an open-source, off-grid, decentralized mesh network. This allows for communication between devices using LoRa radio technology, even without internet access.
This video demonstrates the Meshtastic functionality, showing how the board can be used for off-grid communication. While the video features a V4 board, the core Meshtastic principles apply to the V3 as well.
5.2. Basic Usage Demonstration
The board can be programmed to send and receive data, which is displayed on its integrated OLED screen. This allows for basic text communication or sensor data transmission.
This video provides a quick demonstration of the ESP32 LoRa V3 board in action, showcasing its display and basic data handling capabilities.
6. Ledningsføring Eksamples
Here are some common wiring configurations for the LoRa 32 V3 board with external components.
6.1. Door Monitoring with Hall Sensor
This setup demonstrates how to use a Hall Effect sensor to monitor a door's open/closed status and transmit this information via LoRa.
This video provides a detailed guide on setting up a door monitoring system using the ESP32 LoRa V3 board and a Hall sensor. It covers wiring, code, and practical demonstration.
6.2. Wiring a Relay
To control AC/DC loads, you can connect a relay module to the LoRa 32 V3 board. A boost converter might be needed to provide 5V for the relay if powered by 3.3V.
This segment from the Door Monitor project video illustrates how to wire a relay to the Heltec WiFi LoRa 32 board, enabling control of external devices.
6.3. Wiring a Buzzer with Transistor
For audible alerts, a buzzer can be connected using a transistor to amplify the signal from the LoRa 32 V3 board.
This section of the Door Monitor project video details the wiring for a buzzer using a transistor, providing a clear circuit diagram and explanation.
7. Softwareopsætning
To program your LoRa 32 V3 board, you will need the Arduino IDE and specific board packages and libraries.
7.1. Installing ESP32 Boards and Libraries
Follow these steps to install the necessary software components in your Arduino IDE:
- Install ESP32 Boards: This is essential for any ESP32-based board.
- Install Heltec ESP32 Package: Specific drivers and tools for Heltec boards.
- Install ESP32 Extended Library (from Heltec): Provides extended functionalities.
- Install Adafruit GFX Library: Required for the OLED display.
- Install Robojax Heltec LoRa 32 (zip) Library: Needed for OLED and reading voltage.
This video segment guides you through the software installation process, including adding board URLs, installing ESP32 packages, and adding necessary libraries for your Heltec board.
7.2. Uploading Firmware
After installing the required software, you can upload your code to the board. Ensure the correct board and COM port are selected in the Arduino IDE.
This video segment demonstrates how to upload the transmitter (TX) and receiver (RX) code to your Heltec WiFi LoRa 32 boards, including important code parameters like frequency and transmission power.
8. Fejlfinding
8.1. Hall Sensor Sensitivity Adjustment
If your Hall sensor is not detecting the magnet correctly, you may need to adjust its sensitivity using the potentiometer on the sensor module.
This video segment shows how to adjust the Hall sensor's sensitivity to ensure proper detection of the magnetic field, which is crucial for accurate door status monitoring.
8.2. Fragility and Protection
The development board is an exposed circuit board and can be fragile. It is highly recommended to use a protective case, especially if the device will be used in outdoor or harsh environments, to prevent damage from dust, dirt, or physical impact.
This video demonstrates the assembly of a protective case for the V3 board, highlighting the importance of securing the board and battery within an enclosure.
9. Specifikationer
- Trådløs type: 2.4 GHz radiofrekvens
- Frekvens: 863~928MHz (LoRa)
- Wi-Fi: 802.11 b/g/n, op til 150 Mbps
- Hukommelseslagringskapacitet: 8 MB
- VÆDDER: LPDDR3, DDR3
- Operativsystem: FreeRTOS
- Antal processorer: 2
- Voltage: 5 Volts (via Type-C USB)
- Forbindelse teknologi: USB, Wi-Fi
- Varens vægt: 1.44 ounce
- Pakkedimensioner: 6.73 x 4.49 x 0.98 tommer
- Dato først tilgængelig: 14. september 2018
10. Garanti og support
Specific warranty details are not provided in the product information. For technical support, please refer to the manufacturer's official website or contact the seller directly. Online communities and forums dedicated to ESP32 and LoRa development boards can also be valuable resources for troubleshooting and project ideas.
For additional resources and community support, you may find information related to the product's ASIN: B07HD1CRPD.
