Cardputer v1.1

SKU:K132-V11

Description

Cardputer v1.1 is a high-performance card computer designed for engineers, offering a comprehensive upgrade over the original Cardputer. The new version adopts the brand new Stamp-S3A main controller, with optimized antenna and button design for the core module, significantly improving system stability and user operation experience.
In terms of control and interaction, it features a 56-key keyboard and a 1.14-inch TFT display for efficient operation and display; a built-in SPM1423 digital MEMS microphone supports recording and wake-up functions, while a cavity speaker outputs audio; an infrared emitter enables external infrared control interactions.
For expansion, the built-in Grove interface allows for custom sensor extensions; storage is supported via a Micro SD card slot for storage expansion. The power system consists of a built-in 120mAh battery and a 1400mAh base lithium battery, with integrated charging and power conversion circuits for greatly improved battery life. The base has an integrated magnet for metal surface attachment and is compatible with LEGO hole extensions.
This product is widely applicable to scenarios such as rapid function verification for engineers, industrial control, and home control systems.

Tutorial

Arduino IDE

This tutorial will introduce how to program and control the Cardputer v1.1 device using the Arduino IDE.

UiFlow2

This tutorial will introduce how to control the Cardputer v1.1 device using the UiFlow2 graphical programming platform.

Note

LCD and RGB LED usage note: Since RGB and LCD backlight share the same power source, when the LCD backlight brightness is below 100%, RGB will not be powered properly. Please use the RGB function when the backlight is at full brightness.

Features

Stamp-S3A microcontroller
56-key keyboard
1.14-inch TFT display
Cavity speaker and SPM1423 digital MEMS microphone
Infrared emitter for infrared control interactions
HY2.0-4P interface
microSD card slot
Built-in 120mAh and base 1400mAh lithium batteries
Base with magnets
LEGO hole expansion compatibility
Development Platform
- UiFlow2
- Arduino IDE
- ESP-IDF
- PlatformIO

Includes

1 x Cardputer V1.1
1 x Hex Key L-Shape 1.5mm (For M2 Screw)

Applications

Rapid function verification and prototyping
Industrial control and automation
Home control systems
Data acquisition and sensor monitoring
Embedded system development and learning
Wireless communication and IoT projects

Specifications

Specification	Parameter
SoC	ESP32-S3FN8 (Xtensa LX7), 8MB Flash, Wi-Fi, OTG, CDC
Flash	8MB
External Storage Expansion	microSD
Keyboard	56 keys (4 x 14)
Buttons	1 x Reset button + 1 x User button
Grove	1 x HY2.0-4P
Battery Capacity	120mAh + 1400mAh (in base)
Display	ST7789V2@1.14 Inch, 240 x 135px
Cavity Speaker	8Ω@1W I2S@NS4168
Microphone	MEMS microphone @SPM1423
Infrared Transmission Distance	Infrared transmission distance at ∠0° (straight line): 410cm At ∠90°: 66cm At ∠45°: 170cm
Sleep Current	DC 4.2V@0.15uA
Operating Current	In IR transmission mode: DC 4.2V/148.07mA In key mode: DC 4.2V/138.93mA
Operating Temperature	0 ~ 40°C
Product Size	84.0 x 54.0 x 19.7mm
Product Weight	90.0g
Package Size	145.7 x 95.0 x 20.7mm
Gross Weight	106.8g

Learn

Enter Download Mode

To enter download mode, set the side power switch of the Cardputer v1.1 to the OFF position, then hold down the G0 button before powering on the device, release it after the device is powered on, and the device will enter download mode.

Charging Notes

When charging the Cardputer v1.1, please switch the power to ON.

Disassembly Notes

When removing the Stamp-S3A on the panel, be careful with the FPC cable and connector on the back. Gently lift them up, otherwise the socket for the display connection may be damaged. Refer to the operation video in Cardputer Accessory Kit for guidance.

Schematics

1/4

PinMap

SPM1423 MIC

ESP32-S3FN8	G46	G43	3.3V	GND
SPM1423	DAT	CLK	VCC	GND

microSD Socket

ESP32-S3FN8	G12	G14	G40	G39
microSD Socket	CS	MOSI	CLK	MISO

ST7789V2 & RGB LED

ESP32-S3FN8	G38	G33	G34	G35	G36	G37
ST7789V2	DISP_BL	RST	RS	DAT	SCK	CS
RGB LED	VDD

Keyboard & Battery Detect

ESP32-S3FN8	G10	G7/G6/G5/G4/G3/G15/G13	G11/G9/G8
Battery Detect(ADC)	ADC
74HC138		Y7~Y0	A2/A1/A0

Speaker & IR

ESP32-S3FN8	G41	G42	G43	G44
NS4168 (Speaker)	BCLK	SDATA	LRCLK
IR				TX

HY2.0-4P

HY2.0-4P	Black	Red	Yellow	White
PORT.CUSTOM	GND	5V	G2	G1

Model Size

Datasheets

Softwares

Arduino

UiFlow2

Cardputer v1.1 UiFlow2 Quick Start

PlatformIO

[env:m5stack-cardputer]
platform = espressif32@6.7.0
board = esp32-s3-devkitc-1
framework = arduino
upload_speed = 1500000
build_flags =
    -DESP32S3
    -DCORE_DEBUG_LEVEL=5
    -DARDUINO_USB_CDC_ON_BOOT=1
    -DARDUINO_USB_MODE=1

lib_deps =
    M5Cardputer=https://github.com/m5stack/M5Cardputer

ESP-IDF

Cardputer v1.1 Factory Firmware

Easyloader

Easyloader	Download	Note
Cardputer v1.1 User Demo Easyloader	download	/

Video

Cardputer v1.1 Product Introduction and Case Demonstration

Product Comparison

Product Compare	Cardputer v1.1	Cardputer
Core Module	Stamp-S3A	StampS3
RGB LED Control Logic	RGB LED shares power with screen backlight, optimized control logic	Powered immediately upon power-on
Antenna Design	Optimized antenna design, better signal reception	Standard antenna design
StampS3 Module Boot Key	Improved key feel, key size 4.0 x 3.0 x 2.0mm	Key size 2.6 x 1.6 x 0.55mm
Power Consumption	Optimized for lower power consumption	Standard design

Version Change

Release Date	Change Details	Note
/	First release	/
2025.8.2	Key actuation force changed from 260gf to 160gf	/