M5Stack’s New Cost-effective ‘plug-and-play’ ESP32 miniature module – STAMP PICO

M5Stack’s New Cost-effective ‘plug-and-play’ ESP32 miniature module – STAMP PICO

STAMP PICO features an ultra-compact design with two low-power Xtensa® 32-bit LX6 microprocessors at 240MHz on a PCB as tiny and delicate as a postage stamp.

It is ideal for any space-constrained or battery-powered devices such as wearables, home automation, smart sensors, and other IoT devices.

  1. MULTIPLE STYLE: 5 options of installation, means endless possibilities! (SMT, DIP, flywire, Grove interface), with a high-temperature resistant plastic shell, 3D antenna and components can be better protected.
  2. LOW-CODE DEVELOPMENT: STAMP PICO supports UIFlow graphical programming platform, scripting-free, cloud push; and fully compatible with Arduino, MicroPython, ESP32-IDF, and other mainstream development platforms to quickly build various applications.
  3. HIGH INTEGRATION: STAMP PICO contains 5V->3.3V DC/DC design, GPIOx12, programmable RGB LED x1, button x1, finely tuned RF circuit, providing stable and reliable wireless communication.
  4. STRONG EXPANDABILITY: Easy access to M5Stack’s hardware and software ecology system: a wealth of sensors, actuators, functional modules, and accessories to choose from, Extremely fast adaptation.

Product Features

  • Chip-set: ESP32-PICO-D4 (2.4GHz Wi-Fi and Bluetooth dual mode)
  • Support UIFlow graphical programming
  • Support multiple installation style (SMT, DIP, fly-by-wire)
  • Integrated programmable RGB LED and button
  • Miniature in size



  • Instrumentation
  • Wi-Fi Remote Monitoring/Control
  • Smart Home
  • Color LED Control
  • Fire/security intelligent integrated management
  • Smart Card Terminal
  • Wireless POS

Program Download

  • STAMP PICO adopts the most streamlined circuit design, so it does not include the program download circuit. Users can choose M5Stamp Pico DIY Kit to download the program.
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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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The M5Stamp Pico costs $5.00 USD each and comes packaged Tape & Reel (T&R) with the plastic shell on the PCB. The shell is a high temperature plastic that can survive the 235-250 deg. Celsius peak reflow profile. See the hardware documentation with schematic and reflow profile here:

* STAMP-PICO, SKU:C050-B, K051, K051-B [HW Documentation]


These modules aren’t really “plug-and-play” IMO. You can’t program them without a $4.95 “ESP32 Downloader Kit” (link below), which seems perpetually out-of-stock. But the ESP32 Downloader is just a USB/UART at heart plus a handful of small parts. If you have a generic USB/UART laying around and some junk box parts, or better-yet a spare ESP32/ESP8266 or other USB-enabled 3.3V microcontroller (e.g. blue/black pill) programmed as a bare ESP32 programmer, you should be able to program these M5Stamp Pico modules. The ESP32 Downloader hardware documentation with schematic can be found here:

* ESP32 Downloader Kit, SKU:A105


You can buy a crazy expensive $15.95 M5Stamp Pico DIY Kit (link below), that comes with one $5.00 M5Stamp Pico and one $4.95 ESP32 Downloader, plus a few more little bits and pieces. The problem with the M5Stamp Pico DIY Kit besides the price is that it is also out-of-stock.

This whole ESP32 Downloader Kit complication that M5Stack created is nuts. Instead of selling a $4.95 ESP32 Downloader Kit that nobody can buy, why doesn’t M5Stack just sell a $5.00 M5Stamp Pico PCB pre-programmed to program other M5Stamp Pico modules?

—-[Some M5Stamp Pico Buying Options]—-

* M5Stamp Pico Mate with Pin Headers, SKU:K051, $5.00


* M5Stamp Pico DIY Kit, SKU:K051-B, $15.95 [Out of Stock]


* M5Stamp Pico (5pcs), SKU:C050-B, $23.90 ($4.78 ea.) [Out of Stock]


* ESP32 Downloader Kit, SKU:A105, $4.95 [Out of Stock]



* M5Stamp Pico Mate with Pin Headers, K051, $5.38 [92 In Stock]


* M5Stamp Pico DIY Kit, K051-B, $15.95 [Out of Stock]


Keith Suddick

Another alternative to the Downloader Kit is the ESP-01 Helper which although designed with in-circuit development using the ESP-01 in mind, will happily program and provide serial comms with other ESP8266 and ESP32 based boards including the Pico. For full disclosure I designed and sell the ESP-01 Helper through my Ebid store: https://www.ebid.net/uk/stores/sudsco-electronics

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