# Seeeduino Cloud

> Arduino Yun-compatible board combining ATmega32u4 with a Dragino HE Linux WiFi module running OpenWRT. Features 802.11 b/g/n WiFi, Ethernet, 14 digital I/O pins, and USB host for IoT gateway applications.

## Quick Facts

- **Brand:** Seeed Studio
- **Board Type:** dev-board
- **Price:** ~$49.95
- **Product Readiness:** developer
- **CPU:** ATmega32u4 @ 16 MHz + AR9331 Linux SoC
- **CPU Architecture:** AVR 8-bit
- **CPU Cores:** 1
- **RAM:** 2.5KB SRAM (MCU)
- **Flash:** 32KB
- **Power:** 5V via Micro USB
- **Operating Voltage:** 5V
- **Dimensions:** 75.1 × 53.39 × 11.5 mm
- **Antenna:** Built-in PCB antenna

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Ethernet:** 10/100 Mbps

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Compatible Firmware

arduino, openwrt

## Use Cases

- iot-gateway
- iot
- prototyping
- embedded-linux

## Components

- **ATmega32u4** (mcu): 8-bit AVR microcontroller at 16MHz, 5V with native USB, 32KB flash, 2.5KB SRAM. — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.atmel.com%2FImages%2FAtmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- **Dragino HE (AR9331)** (wifi-module): Dragino HE IoT module with Atheros AR9331 SoC running OpenWRT Linux, providing 802.11b/g/n WiFi and Ethernet. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3034%2FHE%2520WiFi%2520IoT%2520Module%2520datasheet.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)

## Protocols

- **SPI**: MOSI: D11, MISO: D12, SCK: D13
- **I2C**: SDA: A4, SCL: A5
- **UART**: TX: D1, RX: D0
- **802.11 b/g/n**: 
- **Ethernet**: 

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | — | — | UART RX |
| D1 | — | — | UART TX |
| D2 | — | — | GPIO, Interrupt |
| D3 | — | — | GPIO, PWM, Interrupt |
| D4 | — | — | GPIO |
| D5 | — | — | GPIO, PWM |
| D6 | — | — | GPIO, PWM |
| D7 | — | — | GPIO |
| D8 | — | — | GPIO |
| D9 | — | — | GPIO, PWM |
| D10 | — | — | GPIO, PWM |
| D11 | — | — | GPIO, PWM |
| D12 | — | — | GPIO |
| D13 | — | — | GPIO, LED |
| A0 | — | — | Analog In |
| A1 | — | — | Analog In |
| A2 | — | — | Analog In |
| A3 | — | — | Analog In |
| A4 | — | — | Analog In, I2C SDA |
| A5 | — | — | Analog In, I2C SCL |

## Description

## Overview

The Seeeduino Cloud is an Arduino Yun-compatible development board from Seeed Studio that combines the ATmega32u4 microcontroller with the Dragino HE WiFi IoT module — a Linux-based system running OpenWRT on an Atheros AR9331 SoC. This dual-processor architecture allows the Arduino side to handle real-time I/O while the Linux side manages networking, cloud connectivity, and more complex logic.

The board provides 802.11 b/g/n WiFi on 2.4GHz, an Ethernet port, and a USB-A host port through the Dragino HE module, all accessible from the Arduino environment via the Bridge library. This makes it easy to push sensor data to web services, run shell scripts from sketches, or use the board as a lightweight IoT gateway.

The ATmega32u4 runs at 16MHz at 5V and provides 14 digital I/O pins (7 PWM), 6 analog inputs, and hardware Serial, I2C, and SPI. The board is pin-compatible with standard Arduino shields, extending its capabilities with the vast Arduino ecosystem of add-on boards.

Seeeduino Cloud is well suited for projects that bridge the physical world and the internet: data loggers, home automation nodes, sensor gateways, and remote monitoring applications where the combination of real-time microcontroller code and Linux networking capabilities is valuable.

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3034&ref=openhardware.directory&product=seeeduino-cloud&source=md-export) — 49.95

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3034&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FSeeeduino_Cloud%2F&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3034%2FHE%2520WiFi%2520IoT%2520Module%2520datasheet.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3034%2FSeeeduino_Cloud_PDF.pdf&ref=openhardware.directory&product=seeeduino-cloud&source=md-export)

## Tags

`arduino-yun`, `atmega32u4`, `openwrt`, `wifi`, `ethernet`, `linux`, `iot-gateway`, `seeed-studio`

## Images

![Seeeduino Cloud](https://nbg1.your-objectstorage.com/openhardware-directory/entities/seeeduino-cloud/e19a385a7483.jpg)

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