Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | ESP32-S3 Dual-Core Xtensa LX7 |
| LoRa Transceiver | Semtech SX1262 |
| Frequency Bands | 433MHz, 868MHz, 915MHz (Region Dependent) |
| Connectivity | Wi-Fi 802.11 b/g/n, Bluetooth 5 (LE) |
| Display | 0.96 inch OLED (128x64 pixels) |
| Battery Interface | 1S LiPo with Charging Circuit |
| Antenna Connector | IPEX/U.FL for external antenna |
| Input Voltage | 5V via USB-C or 3.7V-4.2V via Battery |
| Dimensions | 63mm x 27mm x 12mm |
| Weight | 18 grams |
Anonymous
Mar 26, 2026
Rating: 5/5
Reliable for industrial prototyping
We are using these for a prototype environmental monitoring system. The stability of the ESP32-S3 combined with the robust LoRa transmission makes it ideal for our low-power, long-range needs.
Anonymous
Mar 24, 2026
Rating: 5/5
Perfect for Meshtastic Projects
This board works flawlessly out of the box with Meshtastic firmware. The SX1262 chip provides excellent range compared to older modules, and the built-in OLED is very handy for checking node status without a phone.
Anonymous
Mar 24, 2026
Rating: 4/5
Great hardware, minor pin labeling issue
The performance is top-notch and WiFi/Bluetooth connectivity is stable. I deducted one star because some of the GPIO pin labels on the silkscreen are a bit small to read easily, but otherwise a solid dev board.
Anonymous
Mar 16, 2026
Rating: 4/5
Good for beginners with some setup
As someone new to LoRa, this board was mostly easy to set up using the Arduino IDE. Had to install a specific board manager package first, but once that was done, uploading sketches was smooth.
Anonymous
Mar 13, 2026
Rating: 5/5
Long range capabilities
Tested this in a rural area with a proper external antenna attached. I was able to hit nodes over 5km away in line-of-sight conditions. The power management seems efficient too.
Anonymous
Mar 09, 2026
Rating: 5/5
Excellent build quality
Heltec never disappoints. The soldering is clean, the USB-C port feels durable, and the battery charging circuit works perfectly with my standard 1000mAh LiPo cells. Highly recommended for IoT learning.
Q: Does this board come with an antenna included?
A: No, the board features an IPEX/U.FL connector for an external antenna, which must be purchased separately to ensure optimal performance and legal compliance.
Q: Do I need a separate programmer to flash custom firmware?
A: No, the board has a built-in USB-to-UART bridge. You can flash custom firmware directly using a USB-C cable and tools like esptool.py or the Arduino IDE.
Q: What is the maximum current draw for the GPIO pins?
A: The ESP32-S3 GPIO pins can typically source or sink up to 40mA per pin, with a total limit for the chip. Please refer to the Espressif datasheet for detailed electrical characteristics.
Q: Can I power this directly from a 5V power bank?
A: Yes, you can power the board via the USB-C port using a standard 5V source like a power bank. It also has a dedicated JST connector for LiPo batteries.
Q: Is this compatible with the original Meshtastic Android app?
A: Absolutely. Once flashed with the Meshtastic firmware, this board communicates seamlessly with both the Android and iOS Meshtastic applications via Bluetooth.
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