Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Processor | ESP32-S3 Dual-Core Xtensa LX7 |
| Flash Memory | 16 MB |
| PSRAM | 8 MB Octal SPI |
| Connectivity | Wi-Fi 4 (802.11 b/g/n), Bluetooth 5 (LE) |
| Cellular Support | 4G LTE Cat.1 Module Included |
| Audio Interface | I2S with Built-in Microphone and Speaker Driver |
| Display Interface | SPI for LCD/OLED Screens |
| Power Supply | 5V via USB-C or Li-Po Battery Input |
| Programming Environment | Arduino IDE, ESP-IDF, MicroPython |
| Form Factor | Compact PCB with Pin Headers for Expansion |
Anonymous
Mar 29, 2026
Rating: 5/5
Perfect for teaching kids about AI voice interaction
Bought this to build a custom voice assistant for my daughter's room. The 4G module works flawlessly, allowing the robot to stay connected even when Wi-Fi is spotty. The audio quality is surprisingly clear for such a small board.
Anonymous
Mar 24, 2026
Rating: 5/5
My kids love their new talking robot
Assembly was straightforward. We followed a tutorial to create a simple dialogue robot. The response time over 4G is fast enough for natural conversation. It's become an educational toy and a learning tool.
Anonymous
Mar 22, 2026
Rating: 5/5
Best board for learning embedded voice systems
As a computer science student, this board gave me everything I needed to understand voice recognition pipelines. The community support is active, and the 4G capability opens up so many project possibilities beyond just local Wi-Fi.
Anonymous
Mar 20, 2026
Rating: 5/5
Excellent value for a 4G enabled dev board
We used these boards for a university project on remote IoT monitoring with voice alerts. The integration with cloud services is seamless. Having 8MB of PSRAM makes a huge difference for buffering audio streams.
Anonymous
Mar 14, 2026
Rating: 4/5
Solid performance for edge AI applications
Using this for a proof-of-concept voice control system in a warehouse. The dual-core processor handles background tasks while managing voice input efficiently. Only minor issue was the initial driver installation for the cellular module on Linux.
Anonymous
Mar 08, 2026
Rating: 4/5
Great hardware, documentation could be better
The ESP32-S3 chip is powerful and the N16R8 configuration handles voice processing well. Setting up the 4G connection required some digging in the forums, but once configured, it's very stable. Ideal for industrial prototyping too.
Q: Can this run TensorFlow Lite for Microcontrollers?
A: Yes, thanks to the ESP32-S3 chip and 8MB PSRAM, this board is fully capable of running TensorFlow Lite for Microcontrollers for basic keyword spotting and voice classification tasks.
Q: Is the microphone sensitive enough for a noisy classroom environment?
A: The onboard microphone is decent for close-range interaction. For noisy environments, we recommend connecting an external I2S microphone module via the pin headers for better noise cancellation.
Q: Does this board come with a SIM card slot pre-soldered?
A: Yes, the 4G version includes a nano-SIM card slot already soldered onto the board. You just need to insert your own SIM card with a data plan.
Q: Can I power this directly from a 3.7V Li-Po battery?
A: Absolutely. The board features a dedicated battery connector and power management circuit that accepts standard 3.7V Li-Po batteries safely.
Q: Which cellular bands does the 4G module support?
A: The integrated Cat.1 module supports major global LTE bands including B1, B3, B5, B8, B20, B28, B38, B40, and B41. Please check compatibility with your local carrier.
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