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Tiny green circuit board with pin headers, thumb-sized form factor

MCDODO

MCDODO Supermini ESP32-S3 Development Board 3pcs

SKU CH-3NEA-BKZDE

Thumb-sized ESP32-S3 board with Wi-Fi, 43 µA deep-sleep current and 11 GPIOs for wearable IoT projects

  • Product typeSingle Board Computers
  • Powerful 160 MHz 32-bit ESP32-S3 processor for responsive IoT tasks
  • 11 b/g/n 2.4 GHz Wi-Fi with Station, SoftAP and mixed modes
  • Ultra-low deep-sleep draw of about 43 µA extends battery life
  • Tiny 22.52 x 18 mm thumb-sized board fits wearables and compact builds
  • Hardware AES-128/256, RSA, HMAC, secure boot for strong device security

Ultra-small IoT development board

The MCDODO Supermini ESP32-S3 Development Board is a high-performance low-power board built around an ESP32-S3 32-bit single-core processor running at 160 MHz. It delivers WiFi connectivity using the 802.11 b/g/n protocol at 2.4 GHz with support for Station mode SoftAP mode SoftAP+Station mode and mixed mode. The ultra-small thumb-sized form factor measuring 22.52 x 18 mm makes it suitable for wearable projects and compact IoT applications.

Makers needing minimal footprint and low power

This board suits developers working on low-power IoT applications and wireless wearable devices where size and deep-sleep consumption of about 43 µA matter. It provides rich interfaces including 1xI2C 1xSPI 2xUART 11xGPIO with PWM and 4xADC alongside cryptographic hardware acceleration for AES-128/256 hash RSA HMAC digital signature and secure boot. Builders who require more GPIO pins larger flash storage or multi-core processing should consider other platforms.

4 Mflash built-in storage capacity

The board includes 4Mflash built-in memory alongside 400KB SRAM and 384KB ROM which determines how much application code and data can be stored on the device. This capacity fits many sensor-driven wearable and edge projects but limits more complex firmware or local logging requirements. Match your firmware size against this figure before choosing the board.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $30.99
Cheaper than about 70% of the 1,420 comparable items (median $44.99).

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Specifications

Product
Product typeSingle Board Computers

Questions about this item

What are the 3 pieces in the pack — are they identical boards or different versions?

The pack contains three identical Supermini ESP32-S3 boards, each with a 32-bit single-core processor at 160 MHz, 4 M flash, 400 KB SRAM, 384 KB ROM, Wi-Fi 802.11 b/g/n at 2.4 GHz, Bluetooth, 11 GPIO with PWM, 4 ADC, 1 I²C, 1 SPI, 2 UART, and a 22.52 × 18 mm form factor.

What does the 160 MHz CPU speed mean for real-time sensor reading and wireless tasks?

The 160 MHz single-core ESP32-S3 can run sensor polling, PWM control, and Wi-Fi or Bluetooth stacks simultaneously, with deep-sleep current around 43 µA for battery-powered wearables.

Which wireless standards are supported and what throughput ceiling do they impose?

The board uses 802.11 b/g/n on the 2.4 GHz band with Station, SoftAP, and combined modes; the PHY rate is capped by the b/g/n specification, and Bluetooth is also integrated for short-range links.

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