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Three small green ESP32-S3 development boards with castellated edges and ceramic antennas

MCDODO

MCDODO ESP32-S3 Mini Development Board 3PCS 240MHz 2.4GHz Wi-Fi Bluetooth 5

SKU CH-3B70-CZGRX

Three compact boards with dual-core 240 MHz processors, 2.4 GHz Wi-Fi and Bluetooth 5 for IoT prototyping

  • Product typeSingle Board Computers
  • Dual-core 32-bit LX7 processor at 240 MHz handles demanding IoT tasks
  • 4 GHz Wi-Fi 802.11 b/g/n and Bluetooth 5 LE keep devices connected
  • 512 KB SRAM plus 384 KB ROM support real-time processing
  • 4 MB Flash with 2 MB PSRAM stores firmware and data
  • Castellated edges and ceramic antenna enable direct soldering to carrier boards

Mini board for IoT prototyping

This pack contains three ESP32-S3 mini development boards built around the ESP32-S3FH4R2 module. Each board integrates a 32-bit LX7 dual-core processor running at 240MHz with onboard 4MB Flash, 2MB PSRAM, 512KB SRAM and 384KB ROM. The castellated module and ceramic antenna allow direct soldering to carrier boards, making the boards suitable for makers and engineers building compact wireless IoT edge devices.

Sustained operation and power management

The flexible clock module and independent power-supply controls enable low power consumption across different scenarios. 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) maintain connectivity while the dual-core processor handles continuous workloads. Onboard memory resources support extended data buffering and firmware execution without frequent external storage access, helping stable performance during long-running tasks.

Installation notes and common issues

Castellated edges let you solder the module directly onto a custom carrier board or use standard headers for breadboard work. The ceramic antenna is integrated, so no external antenna connection is required. Ensure the power supply can deliver stable current for the dual-core processor and wireless radios; insufficient power is the most frequent cause of unexpected resets or dropped connections.

How it compares

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

Price $42.99
Typical for this category: the median of 1,420 items is $44.99.

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Specifications

Product
Product typeSingle Board Computers

Questions about this item

How hot does the ESP32-S3FH4R2 run when the dual-core 240 MHz processor operates continuously?

The board draws low power thanks to flexible clock control and independent power-domain settings, keeping heat modest during all-day 240 MHz workloads.

What external programmer do I need to flash the 4 MB flash and 2 MB PSRAM on this castellated module?

A USB-to-UART adapter wired to the exposed TX/RX pins is sufficient; the onboard ROM bootloader accepts serial download without a dedicated JTAG probe.

Will the 2.4 GHz 802.11 b/g/n Wi-Fi and Bluetooth 5 coexist with older 2.4 GHz gear in my lab?

Yes, the ceramic antenna and standard 802.11 b/g/n plus BLE 5 stack share the band gracefully with legacy devices.

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