Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.

CatSniffer is an original multiprotocol and multiband board for sniffing, communicating, and attacking IoT (Internet of Things) devices using the latest radio IoT protocols. It is a highly portable USB stick that integrates TI CC1352, Semtech SX1262, and an RP2040 for V3 or a Microchip SAMD21E17 for V2

Target atsamd microcontrollers using Rust

Arduino Core for SAMD21 CPU

µCNC - Universal CNC firmware for microcontrollers

USB Mass Storage bootloader (based on UF2) for SAMD21 and SAMD51

LMIC-node | One example to rule them all. LMIC-node is an example LoRaWAN application for a node that can be used with The Things Network. It demonstrates how to send uplink messages, how to receive downlink messages, how to implement a downlink command and it provides useful status information. With LMIC-node it is easy to get a working node quickly up and running. LMIC-node supports many popular (LoRa) development boards out of the box. It uses the Arduino framework, the LMIC LoRaWAN library and PlatformIO.

⚠️ DEPRECATED ⚠️ The comprehensive Arduino Email Client Library.

This is simple yet complete WebServer library for AVR, AVR Dx, Portenta_H7, Teensy, SAM DUE, SAMD21/SAMD51, nRF52, STM32, RP2040-based, etc. boards running Ethernet shields. The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32. Coexisting now with `ESP32 WebServer` and `ESP8266 ESP8266WebServer` libraries. Ethernet_Generic library is used as default for W5x00 with custom SPI

USB host library 2.0 for Zero/M0/SAMD

WebSockets for microcontrollers

9DOF Razor IMU available from SparkFun Electronics

Minimalist portable USB device stack for SAMD21, LPC1800, LPC4300, Xmega

Experiments with Mozzi, mostly on SAMD21 & RP2040 chips

1kByte USB DFU Bootloader for SAMD11 / SAMD21

Firmware for Tessel 2's SAMD21 coprocessor and related SoC code

WebSocket / Socket.IO Server and Client for Arduino based on RFC6455. Now supporting Adafruit nRF52, Portenta_H7, STM32F/L/H/G/WB/MP1, Teensy, SAM DUE, SAMD21, SAMD51, Arduino SAMD21 (Nano 33 IoT), MKR1000 / MKR1010WiFi, RP2040-based boards using WiFi101, WiFiNINA, WiFi, Ethernet, WT32_ETH01, Teensy 4.1 NativeEthernet/QNEthernet or Portenta_H7 WiFi/Ethernet, etc. so that those boards can be voice-controlled by Alexa. Now supporting websocket only mode for Socket.IO. Ethernet_Generic library is used as default for W5x00

DMA-driven 8-way concurrent NeoPixel driver for SAMD21 (M0+), SAMD51 (M4), RP2040 and ESP32S3

A WebSocket Server and Client library for Arduino, based on RFC6455, for writing modern Websockets applications. Now support ESP8266, ESP32 (including ESP32-S2 Saola, AI-Thinker ESP-12K, WT32_ETH01, etc.), nRF52, SAMD21, SAMD51, SAM DUE, STM32F/L/H/G/WB/MP1, Teensy, RP2040-based, etc. boards, with WiFiNINA, Teensy 4.1 NativeEthernet/QNEthernet, Ethernet W5x00 / ENC28J60 / LAN8742A / LAN8720, ESP8266 / ESP32-AT modules/shields, as well as SINRIC / Alexa / Google Home

Horus Binary v2 HAB Tracker

LYFT is a sophisticated remote control for your IKEA BEKANT desk.

RTC Library for SAMD21 based boards

MIDI DIN to MIDI USB Host Converter

A port of FreeRTOS that runs on Arduino Samd21 boards

ESP32, ESP8266 based MIDI Organ using the ML_SynthTools library (little example arduino project)

Reliable Radio Communications using run-length limited Golaycodes over ISM Transceivers at maximum baudrate, all packaged as USB Ethernet adapter

FemtoUSB - ATMEL ARM Cortex M0+ (SAMD21), 256KB @ 48MHz, 3V3

Text library for TinyGo displays

Notes on using the Chinese "SAMD21-M0-Mini" board

Fusee Launcher for the SparkFun SAMD21 breakout boards