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Three small green circuit boards with castellated edges and pin headers

WaveShare

WaveShare ESP32-S3 Mini Development Board 3PCS

SKU CH-ZJQQ-1A03A

Pack of three ESP32-S3 mini boards with dual-core 240 MHz processor, 4 MB flash, 2 MB PSRAM and 2.4 GHz Wi-Fi plus Bluetooth 5

  • Dual-core 32-bit processor reaches 240 MHz for fast IoT tasks
  • 4 GHz Wi-Fi and Bluetooth 5 give wireless connectivity options
  • 34 GPIO pins allow flexible peripheral configuration
  • 4 MB Flash plus 2 MB PSRAM store code and runtime data
  • Castellated module with ceramic antenna enables direct carrier-board soldering

Compact Trio for IoT Prototyping

This pack contains three ESP32-S3 Mini development boards built around the ESP32-S3FH4R2 module. Each board exposes 34 multi-function GPIO pins and a USB serial controller for direct programming. The dual-core Xtensa LX7 processor runs at up to 240 MHz, making the trio suitable for makers, students and engineers developing Wi-Fi or Bluetooth LE connected devices.

Low-Power Wireless Operation

The integrated 2.4 GHz radio supports 802.11 b/g/n Wi-Fi and Bluetooth 5 LE. On-chip 512 KB SRAM, 384 KB ROM, 4 MB Flash and 2 MB PSRAM provide ample buffer for protocol stacks. Flexible clock control and independent module power supply let the firmware scale frequency and voltage down for battery-powered or energy-harvesting scenarios.

Breadboard-Friendly Edge Nodes

Castellated edges allow each module to be soldered directly onto a custom carrier or plugged into standard headers. The onboard ceramic antenna frees PCB space otherwise needed for external RF parts. Four SPI, two I2C, three UART, two I2S and two ADC channels give plenty of peripheral options without requiring additional interface chips.

Highlights

  • Dual-core 32-bit processor reaches 240 MHz for fast IoT tasks
  • 4 GHz Wi-Fi and Bluetooth 5 give wireless connectivity options
  • 34 GPIO pins allow flexible peripheral configuration
  • 4 MB Flash plus 2 MB PSRAM store code and runtime data
  • Castellated module with ceramic antenna enables direct carrier-board soldering

Specifications

No published specifications for this item yet.

Questions about this item

How do I solder the castellated module to a carrier board without bridging pins?

Align the board on the carrier pads, apply flux to each castellated edge, then drag-solder with a fine tip; the 34 GPIO pins are on 2 mm pitch so excess solder bridges adjacent pads easily

What maintenance or replacement will the board need later?

The onboard 4 MB Flash and 2 MB PSRAM are fixed; if storage or memory fails the whole module must be replaced as individual chips are not socketed

What limit appears first under sustained 240 MHz dual-core load with Wi-Fi active?

The 512 KB SRAM fills quickly with network buffers and RTOS tasks, causing allocation failures before the processor throttles

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