Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Processor | ESP32-S3 Dual-core Xtensa LX7 |
| Pin Count | 44-pin and 42-pin interface support |
| Connectivity | Wi-Fi 2.4 GHz and Bluetooth 5 (LE) |
| Module Compatibility | ML307 R4G LTE Cat.1 Module |
| Form Factor | Breadboard-friendly design |
| Power Supply | 5V via USB-C or VIN pin |
| Memory | 8MB PSRAM, 4MB Flash |
| Programming Interface | USB-to-UART bridge included |
| Operating Temperature | -40°C to +85°C |
| Application Focus | AIoT, Edge Computing, Prototyping |
Anonymous
Mar 28, 2026
Rating: 4/5
Reliable for industrial tests
We used these for initial proof-of-concept testing. They are stable and the thermal performance is good even under continuous load. Would recommend for evaluation.
Anonymous
Mar 16, 2026
Rating: 5/5
Great replacement base
Needed a reliable base for my ESP32-S3 projects involving cellular data. This board handles the power requirements of the R4G module without any voltage drops.
Anonymous
Mar 13, 2026
Rating: 5/5
Excellent for learning
As a student, this board helped me understand how to interface AI modules with cellular networks. The USB-C connection is a nice modern touch.
Anonymous
Mar 09, 2026
Rating: 4/5
Solid hardware, minor docs gap
The build quality is excellent and the ESP32-S3 performs well. I wish the schematic for the specific GPIO mapping to the 4G module was slightly more detailed, but I figured it out.
Anonymous
Mar 07, 2026
Rating: 5/5
Plug and play
Saved me hours of wiring. The 44-pin configuration matches my sensors perfectly. Very happy with this purchase.
Anonymous
Mar 03, 2026
Rating: 5/5
Perfect for IoT Prototyping
This board makes integrating the ML307 module incredibly easy. The pin layout is logical, and it fits perfectly on my breadboard. Great for rapid development.
Q: Can I program this using Arduino IDE?
A: Yes, the ESP32-S3 chip is fully compatible with the Arduino IDE. You will need to install the ESP32 board manager package.
Q: Is there a SIM card slot on this board?
A: The SIM card slot is located on the ML307 module itself, not on this base board. Once the module is inserted into the base, you can access the SIM slot.
Q: Does this board come with the ML307 module included?
A: No, this is a base/expansion board designed to hold the ML307 R4G module. The module must be purchased separately unless specified in a bundle.
Q: Does it support MicroPython?
A: Yes, the ESP32-S3 processor supports MicroPython. You can flash the firmware just like on other ESP32 variants.
Q: What is the maximum current this board can supply to the 4G module?
A: The board is designed to handle the peak current bursts of the ML307 module (up to 2A), provided you use a sufficient 5V power source via the USB-C or VIN pin.
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