# CardputerZero (M5Stack)

> A keyboard-equipped pocket computer project.

- **Category:** Computers & handhelds
- **Availability:** In development
- **Good for:** Experiment with a small Linux keyboard computer.
- **You'll need:** Software setup and any required expansion modules.
- **Trade-off:** Documentation is work in progress; LoRa is not built in.
- **Page:** https://gadgets.sh/devices/cardputer-zero/

## Where to buy

| Shop | Status | Link |
|---|---|---|
| M5Stack | Documentation at docs.m5stack.com | https://docs.m5stack.com/en/CardputerZero?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=cardputer-zero&utm_content=api |

## Blueprint

**Schematics published.** M5Stack publishes a schematic PDF (rev V0.6.1, pre-release) for the RPi-CM0-based CardputerZero; no PCB source, Gerbers, BOM, or 3D enclosure files found.

### Design files

- schematic: [CardputerZero schematic (PDF, rev V0.6.1, 2026-07-02)](https://m5stack-doc.oss-cn-shenzhen.aliyuncs.com/1243/C154-CardputerZERO_SCH_V0.6.1_20260702.pdf) (PDF)

### Source repositories

- [CardputerZero/Template](https://github.com/CardputerZero/Template) — sdk, MIT, ★22

### Key parts

| Part | Role | Datasheet |
|---|---|---|
| Raspberry Pi Compute Module Zero | core SoM (application processor) | https://www.raspberrypi.com/products/compute-module-zero/ |
| ST7789V3 | display driver (1.9" LCD, 320x170) | https://www.mouser.com/datasheet/2/1439/ST7789V3_DS-3244313.pdf |

_Notes:_ CardputerZero is a Kickstarter/pre-release M5Stack product; the CardputerZero GitHub org (Template, launcher, AppBuilder, etc.) is all app/OS software, not hardware. Confirmed schematic PDF returns 200; no matching product code found in the m5stack/M5_Hardware repo tree yet, so no 3D/structure files could be verified as existing.

## Specifications

### Compute & storage

| | |
|---|---|
| Core module | Raspberry Pi Compute Module 0 |
| CPU | RP3A0 / BCM2837; four Cortex-A53 cores at 1 GHz; ARMv8-A |
| RAM | 512 MB LPDDR2 |
| Storage | microSD; standard C154 includes 32 GB; Lite C155 does not |

### Display, camera & sensors

| | |
|---|---|
| Display | 1.9-inch ST7789V3 LCD; 320 × 170 |
| Keyboard | 46-key matrix; TCA8418 controller at I²C 0x34 |
| Camera | IMX219; 8 MP; 3280 × 2464; absent on Lite |
| Motion | BMI270 IMU and BMM150 magnetometer; absent on Lite |
| RTC | RX8130CE |
| Infrared | Transmit GPIO12; receive GPIO13 |

### Connectivity & expansion

| | |
|---|---|
| Wi-Fi | 2.4 GHz 802.11b/g/n; Bluetooth also listed |
| Ethernet | 10/100 Mbps through SR9900A USB bridge |
| USB | One USB-A 2.0; two USB-C 2.0; physical host/slave switch; right port supports OTG |
| Slave-mode limitation | USB hub, left USB-A/C, Ethernet and HAT USB are disconnected in slave mode |
| Grove/HY2.0 | Four-pin switchable UART/I²C; 5 V output below 500 mA; UART default |
| Grove signal pins | GPIO14 TX / GPIO2 SDA; GPIO15 RX / GPIO3 SCL; GPIO4 switches mode |
| Expansion bus | 14-pin 2.54 mm header with USB/GPIO, SPI, I²C, UART and 5 V power |
| I/O expansion | M5IOE1 at I²C 0x4F; controls reset, power routing and indicators |

### Audio, power & body

| | |
|---|---|
| Audio | ES8389 codec; MEMS mic; AW8737A amplifier; 1 W 8 Ω speaker |
| Headset | 3.5 mm TRRS; CTIA/OMTP switchable; maker recommends 35 Ω headphones |
| Video | 1080p30 digital output; H.264/MPEG-4 decode and H.264 encode |
| Battery | 3.7 V, 1750 mAh with NTC; BQ27220 gauge |
| Power | 5 V 2 A recommended; idle consumption listed as 2.5 W |
| Dimensions | 84 × 54 × 23.1 mm |

### Software & revision

| | |
|---|---|
| Status | Packaging, software and documentation marked work in progress |
| Tools | Image flashing guide, ADB guide and application template available |
| Pending | SDK, kernel releases, weight and package dimensions marked incomplete |

## Documentation

- [Maker specifications and product details](https://docs.m5stack.com/en/CardputerZero)
- [M5Stack crowdfunding campaign](https://www.kickstarter.com/projects/m5stack/cardputerzero)
- [Schematics v0.6.1](https://m5stack-doc.oss-cn-shenzhen.aliyuncs.com/1243/C154-CardputerZERO_SCH_V0.6.1_20260702.pdf)
- [Flash an OS image](https://docs.m5stack.com/en/guide/linux/cardputerzero/image)
- [ADB connection & debugging](https://docs.m5stack.com/en/guide/linux/cardputerzero/adb)
- [Application development template](https://github.com/CardputerZero/Template)
- [PDF](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/static/pdf/static/en/CardputerZero.pdf)

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Source: gadgets.sh · https://gadgets.sh/devices/cardputer-zero/ · JSON: https://gadgets.sh/api/v1/devices/cardputer-zero.json