Cardputer

SKU:K132

Description

Cardputer is a card-sized computer designed for engineers, featuring an M5StampS3 as the main controller.
For human-machine interaction, it is equipped with a 56-key keyboard and a 1.14-inch TFT screen. The onboard SPM1423 digital MEMS microphone supports recording or wake-up functions, while the built-in cavity speaker enables audio playback. An infrared emitter provides IR control capability.
Expansion is provided via a Grove port for custom sensor connection, and a Micro SD card slot allows storage expansion.
Power is supplied by an internal 120 mAh battery plus a 1400 mAh battery in the base, greatly extending battery life. Integrated charge, boost and buck circuits are included.
The magnetic base can attach to metal surfaces and offers LEGO-compatible mounting holes.
Cardputer is ideal for rapid functional prototyping, industrial control, smart-home systems and more.

Note

Disassembly Notice

When removing the StampS3 module from the front panel, be very careful with the FPC cable and connector on the back. Gently pull it out to avoid damaging the screen connector. Refer to the operation video in the Cardputer Accessory Kit.

Tutorial

Arduino IDE

This tutorial shows you how to program and control the Cardputer using the Arduino IDE.

UiFlow2

This tutorial shows you how to control the Cardputer using the UiFlow2 graphical programming platform.

Features

M5StampS3 microcontroller
56-key keyboard
1.14-inch TFT screen
Cavity speaker and SPM1423 digital MEMS microphone
Infrared emitter for IR control
HY2.0-4P port for connecting and expanding I2C sensors
Micro SD card slot for storage expansion
Built-in 120 mAh battery plus 1400 mAh battery in the base for long battery life
Magnetic base with LEGO-compatible mounting holes
Development Platform
- UiFlow2
- Arduino IDE
- ESP-IDF
- PlatformIO

Includes

1 x Cardputer
1 x Hex Key L-Shape 2.0mm (For M2 Screw)

Applications

Rapid functional verification and prototyping
Industrial control and automation
Smart-home control systems
Data acquisition and sensor monitoring
Embedded system development and education
Wireless communication and IoT projects

Specifications

Specification	Parameter
SoC	ESP32-S3FN8 (Xtensa LX7), 8MB Flash, Wi-Fi, OTG, CDC
Flash	8MB
Storage	SD Card
Keyboard	56 keys (4 x 14)
Buttons	1 x Reset button + 1 x User button
Grove	1 x HY2.0-4P
Battery Capacity	120 mAh + 1400 mAh (in base)
Screen	ST7789V2 @ 1.14 inch, 240 x 135 px
Speaker	8 Ω @ 1 W I2S @ NS4168
Microphone	MEMS microphone @ SPM1423
IR Emitting Distance	410 cm at ∠0°, 170 cm at ∠45°, 66 cm at ∠90°
Sleep Current	DC 4.2 V @ 0.26 µA
Working Current	IR mode: DC 4.2 V @ 255.6 mA; Keyboard mode: DC 4.2 V @ 165.7 mA
Operating Temperature	0 ~ 40 °C
Product Size	84.0 x 54.0 x 19.7 mm
Product Weight	92.3 g
Package Size	145.7 x 95.0 x 20.7 mm
Gross Weight	109.9 g

Learn

Download Mode

To enter download mode, hold the side G0 button before powering on the Cardputer, then release it after power is applied. The device will start in download mode.

Charging Notice

When charging the Cardputer, set the power switch to ON.

Schematics

1/3

PinMap

SPM1423 MIC

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

Micro SD Socket

ESP32-S3FN8	G12	G14	G40	G39
Micro SD 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 UiFlow2 Quick Start

PlatformIO

[env:m5stack-stamp-s3]
platform = espressif32
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 =
    M5Unified=https://github.com/m5stack/M5Unified

ESP-IDF

Cardputer Factory Firmware

Easyloader

Easyloader	Download	Note
Cardputer User Demo Easyloader	download	/

Video

Cardputer Introduction