Description
Heltec V4 OLED Solar Powered LoRa 32 Dev-Board – the ultimate IoT development platform that combines the power of ESP32‑S3, LoRa, WiFi, Bluetooth, and a built‑in 16 MB PSRAM with a sleek OLED display and a solar charging system. Perfect for Arduino enthusiasts, makers, and professionals looking to build autonomous, low‑power wireless applications.
Key Highlights
- Dual‑core ESP32‑S3 processor (240 MHz) for fast, multitasking performance
- Integrated SX1262 LoRa module – 433/868/915 MHz support, 16 dBm transmit power
- WiFi 802.11 b/g/n and Bluetooth 5.0 for versatile connectivity
- 16 MB PSRAM + 4 MB flash – ample memory for complex firmware and data buffering
- 1.3″ 128×64 OLED display with I2C interface for instant status feedback
- Built‑in 3.7 V Li‑Po battery + solar panel charging circuit for autonomous operation
- Arduino‑compatible pinout and libraries – quick start with existing sketches
- Multiple expansion headers (GPIO, UART, SPI, I2C, PWM) for sensor and actuator integration
- Robust PCB design with low‑noise power rails and high‑speed signal routing
Technical Specifications
Processor: ESP32‑S3 Dual‑core 240 MHz, 240 KB SRAM per core
Wireless: LoRa SX1262 (433/868/915 MHz), WiFi 802.11 b/g/n, Bluetooth 5.0
Memory: 16 MB PSRAM, 4 MB external flash
Display: 1.3″ 128×64 OLED, I2C, 4 wire interface
Power: 3.7 V Li‑Po battery, solar panel input (5 V), USB‑C 5 V input
Dimensions: 60 mm × 60 mm × 20 mm (approx.)
Operating Temperature: –40 °C to +85 °C
Ideal Use Cases
- Remote environmental monitoring stations with solar power
- Smart agriculture sensors and irrigation controllers
- Industrial IoT gateways and edge devices
- Prototyping and rapid development of LoRaWAN applications
- DIY home automation and smart city projects
Why Choose Heltec V4?
With its all‑in‑one design, the Heltec V4 eliminates the need for external power modules and displays, reducing BOM cost and board footprint. The integrated solar charger ensures your device stays operational in remote locations, while the ESP32‑S3’s rich peripheral set and low‑power modes make it ideal for battery‑powered deployments. Whether you’re a hobbyist or a commercial developer, this board delivers performance, flexibility, and reliability in a compact package.
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