Attributes

Brand	-
Category	Electronic Components / Maker DIY / Development Boards & Control Boards
Origin	-
Microcontroller	ESP32-C3FH4
Flash Memory	4 MB
Wi-Fi Standard	802.11 b/g/n 2.4 GHz
Bluetooth Version	Bluetooth 5.0 (LE)
GPIO Pins	22 Programmable
Input Voltage	5V via USB-C
Operating Voltage	3.3V
USB Interface	USB to Serial UART
Board Size	20.5 x 17.5 mm
Weight	3.5 grams

5 reviews

Anonymous

Apr 01, 2026

Rating: 3/5

Pinout tricky

Needs better documentation. Some pins are strapping pins which confused me initially.

Anonymous

Apr 01, 2026

Rating: 5/5

Compact and Powerful

Great for wearables. The size is perfect for my smart ring project and connectivity is stable.

Anonymous

Mar 15, 2026

Rating: 4/5

Good but runs warm

Works well but gets warm under heavy Wi-Fi load. Otherwise excellent value for money.

Anonymous

Mar 14, 2026

Rating: 5/5

Best Mini Board

Love the USB-C port. Much more durable than the micro USB on older boards.

Anonymous

Feb 12, 2026

Rating: 5/5

Arduino Compatible

Uploaded sketches easily using the Arduino IDE. No driver issues on Windows 10.

5 FAQ

Q: What is the maximum current output?

A: The 3.3V pin can supply up to 500mA recommended, but total consumption should be monitored.

Q: Does this support PlatformIO?

A: Yes, PlatformIO supports the ESP32-C3 platform fully within the ESP32 framework.

Q: What is the antenna gain?

A: The onboard PCB antenna has an approximate gain of 2 dBi.

Q: Can I connect a LiPo battery directly?

A: No, there is no charging circuit. You must use a regulated 5V supply or external charger.

Q: Is JTAG debugging supported?

A: Yes, JTAG is supported via specific GPIO pins for advanced debugging.

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