Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | ESP32-S3-WROOM-1 (Dual-core Xtensa LX7) |
| Wireless Connectivity | Wi-Fi 2.4 GHz, Bluetooth 5 (LE), LoRa (SX1262) |
| Flash Memory | 8 MB PSRAM + 4 MB Flash |
| Display Interface | 0.96 inch OLED (128x64) via I2C |
| Power Supply | USB Type-C or 3.7V Li-Po Battery |
| Battery Management | Integrated TP4054 Charging Circuit |
| Antenna | External SMA Connector for LoRa/Wi-Fi |
| GPIO Pins | 21 Programmable GPIOs with Touch Sensors |
| Programming Interface | Compatible with Arduino IDE, ESP-IDF, MicroPython |
| Dimensions | 63mm x 28mm x 12mm |
Anonymous
Mar 27, 2026
Rating: 5/5
LoRa performance exceeded expectations
Tested the range in an open field and got over 2km with the stock antenna. The integration of BLE and LoRa on one board simplifies my prototype design significantly. The USB-C port is also very convenient.
Anonymous
Mar 23, 2026
Rating: 4/5
Good learning board
As someone new to ESP32, this board was easy to get started with thanks to the Arduino compatibility. The OLED display helps visualize data immediately. Wish it came with a case, but that's a minor issue.
Anonymous
Mar 22, 2026
Rating: 5/5
Excellent value for money
I bought three of these for a home automation mesh network. The battery charging circuit works perfectly with my existing 18650 cells. The dual-core processor handles multiple tasks without lag. Highly recommended for hobbyists.
Anonymous
Mar 22, 2026
Rating: 5/5
Perfect for Meshtastic Projects
This board is exactly what I needed for my long-range communication project. The SX1262 chip works flawlessly with the Meshtastic firmware, and the built-in OLED screen is a huge plus for debugging without a computer. Setup in Arduino IDE was smooth.
Anonymous
Mar 18, 2026
Rating: 4/5
Great hardware, minor documentation gaps
The build quality is solid and the Wi-Fi range is impressive. I deducted one star because the pinout diagram in the manual could be clearer regarding the specific LoRa pins. Once figured out, it works great for sensor nodes.
Anonymous
Mar 18, 2026
Rating: 5/5
Robust industrial prototype solution
Used this for a rapid prototype in an agricultural monitoring system. The power management is efficient, allowing days of operation on a single charge in deep sleep mode. The SX1262 provides reliable packet delivery.
Q: What is the maximum voltage for the Li-Po battery?
A: This board is designed for standard single-cell Lithium Polymer batteries with a nominal voltage of 3.7V. Do not connect batteries with higher voltages as it may damage the charging circuit.
Q: Does this board support external antennas for both Wi-Fi and LoRa?
A: Yes, the board features an SMA connector that can be switched between the internal PCB antenna and an external antenna for both Wi-Fi and LoRa bands using the onboard u.FL switch.
Q: How do I install the Meshtastic firmware on this specific version?
A: You can flash Meshtastic using the web-based installer at meshtastic.org or via the command-line tool. Ensure you select the 'Heltec V3' or 'ESP32-S3' target variant during the flashing process.
Q: Is the OLED display programmable using MicroPython?
A: Yes, the OLED display is fully supported in MicroPython. You can use libraries like 'ssd1306' to control the screen, provided you initialize the correct I2C pins defined in the board's pinout.
Q: Can I power this directly from a 5V USB charger without a battery connected?
A: Absolutely. You can power the board solely via the USB Type-C port. The battery management system will only engage if a Li-Po battery is connected to the JST-PH 2.0mm header.
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