M5Stack Cardputer with M5StampS3 v1.1

The M5Stack Cardputer v1.1 is a high-performance card computer designed for engineers, makers and hackers, offering a comprehensive upgrade over the original Cardputer.

The new version features the brand new StampS3A main controller with USB-C, with an optimised antenna and button design for the core module, significantly enhancing system stability and user experience.

In terms of control interaction, the product is equipped with a 56-key keyboard and a 1.14′ TFT screen for efficient display and operation. It includes an onboard SPM1423 digital MEMS microphone supporting recording and wake-up functions, and outputs audio through a cavity speaker. An infrared emitter provides external infrared control interaction capabilities.

For expansion, the built-in Grove interface facilitates custom sensor expansion; for storage, a MicroSD slot is available for easy storage expansion.

The system is powered by an internal 120mAh lithium battery and a base 1400mAh lithium battery power solution, integrating lithium battery charging and boost-buck circuits, greatly enhancing battery life. Structurally, the base includes magnets for metal attachment and is compatible with building brick hole expansion.

With a dedicated section on M5Burner for the Cardputer and endless community projects (some a little evil…), the Cardputer is an awesome tool for makers and hackers alike!

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Lithium Battery Shipping: Due to courier restrictions, this product can only be shipped within the United Kingdom. With this item in your cart your shipping options will be limited and may cost more than our usual rates. Why?

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Features

• StampS3A Microcontroller
• 56-key keyboard
• 1.14′ TFT screen
• Cavity speaker and SPM1423 digital MEMS microphone
• Infrared emitter for infrared control interaction
• Grove interface
• Micro SD card slot
• Built-in 120mAh and 1400mAh lithium battery in the base
• Base with magnets
• Compatible with building brick hole expansion
• Development Platform
  • UiFlow2
  • Arduino IDE
  • ESP-IDF
  • PlatformIO

Cardputer vs Cardputer v1.1

	Cardputer v1.1	Cardputer
Core Module	StampS3A	StampS3
RGB LED Control	RGB LED shares power with screen backlight, optimised control logic	Power is supplied when powered on
Antenna Design	Optimised antenna design for better signal reception	Standard antenna design
StampS3 Boot button	Optimised button feel, buttons are 4.0 × 3.0 × 2.0mm	Button specifications 2.6 × 1.6 × 0.55mm
Power Consumption	Optimised for lower power consumption	Standard design

Specifications

StampS3A	ESP32-S3 (Xtensa LX7), 8MB Flash, Wi-Fi, OTG, CDC
Flash	8MB
Storage	SD Card
Keyboard	56 keys (4 × 14)
Buttons	1 × Reset button + 1 × User button
Grove	1 × HY2.0-4P
Battery Capacity	120mAh + 1400mAh (in base)
Screen	ST7789V2 @ 1.14′, 240 × 135px
Cavity Speaker	8Ω @ 1W I2S @ NS4168
Microphone	MEMS Microphone @ SPM1423
Infrared Distance	<0° Infrared emission distance (straight line): 410cm <90° Infrared emission distance: 66cm <45° Infrared emission distance: 170cm
Sleep Current	DC 4.2V @ 0.15µA
Working Current	IR emission mode: DC 4.2V / 148.07mA Keyboard mode: DC 4.2V / 138.93mA
Operating Temperature	0 ~ 40°C
Product Dimensions	84.0 × 54.0 × 19.7mm
Product Weight	90.0g
Package Dimensions	145.7 × 95.0 × 20.7mm
Gross Weight	106.8g

Resources

• Product Documentation
• Cardputer v1.1 Arduino Library
• Cardputer v1.1 UiFlow2 Quick Start
• ESP-IDF Cardputer v1.1 User Demo

Schematics

• Cardputer V1.1 Schematics
• Cardputer V1.1 Base Schematics
• Stamp-S3A Schematics

Datasheets

• SPM1423
• NS4168
• ST7789V2

Package Contents

• 1x Cardputer v1.1
• 1x L-shaped hex wrench 1.5mm (for M2 screws)

USB-C cable not included