Introducing the ProS3 - The Ultimate Pro ESP32-S3 Development Board


Sold by Unexpected Maker


No tax for United States [change]
Ships with either an onboard antenna or u.FL connector for an external antenna
Stock available: 14
Volume discount
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It's packed with amazing features and peripherals, ESD protection, castellated headers, wireless connectivity and stacks of Flash and PSRAM, and it's TinyPICO/ProS3 compatible!

Features & Specifications

  • 32Bit Dual Core 240MHz
  • RISC-V ultra low power core
  • 2.4GHz WiFi - 802.11b/g/n
  • Bluetooth 5, BLE + Mesh - 16MB QSPI Flash
  • 8MB Extra QSPI PSRAM
  • USB-C Connector - USB ESD protection
  • Reverse USB back-feed protection - 2x 700mA 3.3V LDO Regulator
  • Ultra low deep sleep current
  • STEMMA connector
  • Low Power RGB LED
  • VBAT voltage check and 5V presence detection
  • LiPo Battery Charging
  • MicroBlade LiPo connector
  • Power (red), Charge (orange) LEDs
  • 27x GPIO broken out
  • Castellated Headers
  • JTAG Pins + USB Serial JTAG
  • 3D High Gain Antenna
  • Compatible with TinyPICO, TinyS2 & TinyS3

What's included?

Ships with a set of male headers you can solder on if required and a Microblade to JST-PH battery converter cable.

Ships with CircuitPython pre-installed!

The ProS3 ships with the latest version of CircuitPython that supports the ESP32-S3. It also ships with the UF2 bootloader, so you can easily update your ProS3 with the latest CircuitPython firmware, whenever you desire.

As newer versions of CircuitPython are released, you are able to update as you require from

Code any way you like!

There is also ESP-IDF, MicroPython and Arduino support. Visit the ProS3 product page for more details

Find out more about what I do

Check out my youtube channel to see other projects I work on!

Unexpected Maker YouTube

Unexpected Maker Twitter

Unexpected Maker Website

Links to code and documentation

Documentation (

Design Files (

Product HS Code: 853400

Shipping policy

All products purchased on this store ship directly from me here in Melbourne, Australia.

Orders are processed daily and usually go out the same day they are paid for - allowing for time zone differences of course.

Finally, postage rates suck, sorry :( I'm embarrassed by how much it costs to ship items overseas since COVID, and I do my best to improve rates where I can.

Postage delivery times, if stated, are based on current expectations from Australia Post and may vary.

Please keep in mind that there are still occasional postage delays, including flights out of Australia and inbound customs processing into many countries.

The seller

Unexpected Maker

Moorabbin, Victoria, Australia
93 orders since Apr 21, 2022