# Netduino Plus 2

> The Netduino Plus 2 is an Arduino R3-compatible .NET Micro Framework development board with a 168MHz ARM Cortex-M4 processor, built-in Ethernet, microSD slot, and 12-bit ADC — offering C# programming for connected embedded applications.

## Quick Facts

- **Brand:** Netduino
- **Board Type:** dev-board
- **Price:** ~$59.95
- **Product Readiness:** developer
- **CPU:** STM32F427 ARM Cortex-M4 @ 168MHz
- **CPU Architecture:** ARM Cortex-M4
- **CPU Cores:** 1
- **RAM:** 100+ KB
- **Flash:** 384 KB
- **Power:** 5V via Micro-USB or DC jack
- **Operating Voltage:** 3.3V
- **SD Card:** microSD

## Connectivity

- **Ethernet:** 10/100 Mbps

## Open Source

- **Status:** partially-open
- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Compatible Firmware

dotnet-micro-framework

## Use Cases

- iot
- industrial-automation

## Components

- **STM32F427** (mcu): ST Microelectronics STM32F427 ARM Cortex-M4F at 168MHz with FPU, 384KB flash, 100KB+ RAM — [Datasheet](https://openhardware.directory/r?to=http%3A%2F%2Fwww.netduino.com%2Fnetduinoplus2%2Fspecs.htm&ref=openhardware.directory&product=netduino-plus-2&source=md-export)

## Protocols

- **I2C**: SDA: A4, SCL: A5
- **SPI**: MOSI: D11, MISO: D12, SCK: D13, CS: D10
- **UART**: TX: D1, RX: D0
- **PWM**
- **JTAG**

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | D0 | — | GPIO, UART RX |
| D1 | D1 | — | GPIO, UART TX |
| D2 | D2 | — | GPIO |
| D3 | D3 | — | GPIO, PWM |
| D4 | D4 | — | GPIO |
| D5 | D5 | — | GPIO, PWM |
| D6 | D6 | — | GPIO, PWM |
| D7 | D7 | — | GPIO |
| D8 | D8 | — | GPIO |
| D9 | D9 | — | GPIO, PWM |
| D10 | D10 | — | GPIO, SPI CS, PWM |
| D11 | D11 | — | GPIO, SPI MOSI, PWM |
| D12 | D12 | — | GPIO, SPI MISO |
| D13 | D13 | — | GPIO, SPI CLK |
| A0 | A0 | — | GPIO, ADC |
| A1 | A1 | — | GPIO, ADC |
| A2 | A2 | — | GPIO, ADC |
| A3 | A3 | — | GPIO, ADC |
| A4 | A4 | — | GPIO, ADC, I2C SDA |
| A5 | A5 | — | GPIO, ADC, I2C SCL |

## Available Software

- **[.NET Micro Framework]()** (open-source)
- **[Visual Studio]()** (open-source)
- **[Mono]()** (open-source)

## Description

## Overview

The Netduino Plus 2 is the second-generation .NET Micro Framework development board from Secret Labs, featuring a significant upgrade from the original Netduino Plus with a 168MHz 32-bit ARM Cortex-M4 processor, 384KB of flash, and over 100KB of RAM. It maintains full Arduino R3 pinout compatibility while adding 6 PWM channels and a 12-bit ADC.

Built around the same .NET Micro Framework philosophy, it allows embedded development in C# with full support for event-based programming, multi-threading, and line-by-line debugging via Visual Studio. The 5V-tolerant digital I/O supports driving LEDs directly at up to 25mA per pin without external components.

Ethernet with full TCP/IP stack and a microSD card slot make the Netduino Plus 2 a capable platform for data-logging and networked IoT applications. The 10-pin MiniJTAG debug header replaces the 6-pin ICSP of earlier boards, enabling richer debugging workflows. It is compatible with most Arduino shields and the broader .NET Micro Framework ecosystem.

## Where to Buy

- [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1104&ref=openhardware.directory&product=netduino-plus-2&source=md-export) — $59.95

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F1104&ref=openhardware.directory&product=netduino-plus-2&source=md-export)
- [docs](https://openhardware.directory/r?to=http%3A%2F%2Fwww.netduino.com%2Fnetduinoplus2%2Fspecs.htm&ref=openhardware.directory&product=netduino-plus-2&source=md-export)
- [community](https://openhardware.directory/r?to=http%3A%2F%2Fforums.netduino.com%2F&ref=openhardware.directory&product=netduino-plus-2&source=md-export)

## Tags

`netduino`, `dotnet`, `ethernet`, `arduino-compatible`, `cortex-m4`, `csharp`, `microsd`

## Images

![Netduino Plus 2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/netduino-plus-2/bde2ee9324c4.jpg)
![Netduino Plus 2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/netduino-plus-2/239026e3ed45.jpg)

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