samd21

Go compiler for small places. Microcontrollers, WebAssembly, and command-line tools. Based on LLVM.

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

9DOF Razor IMU available from SparkFun Electronics

This is simple yet complete WebServer library for AVR, 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.

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

USB host library 2.0 for Zero/M0/SAMD

1kByte USB DFU Bootloader for SAMD11 / SAMD21

⚡️The first email sender and reader Arduino library which supports ESP8266, ESP32 and Atmel's SAMD21 with u-blox NINA-W102 WiFi/Bluetooth module, brings the real Email client to the embedded devices. The library supports various types of attachments and messages. RFC standards compliance. Ethernet supported

WebSockets for microcontrollers

MIDI DIN to MIDI USB Host Converter

This is simple yet complete WebServer library for AVR, Portenta_H7, Teensy, SAM DUE, SAMD, STM32, RP2040-based, etc. boards running WiFi modules/shields (WiFiNINA U-Blox W101, W102, etc.). The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.

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.

This is simple yet complete WebServer library for AVR, Teensy, SAM DUE, SAMD, STM32, nRF52, etc. boards running ESP8266 AT-command shields. The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.

Some tips and tricks for CircuitPython, using a QT Py board

an awesome controller for musicmachines

Text library for TinyGo displays

Convert USB keyboard, mouse, MIDI to Bluetooth

This library gives an example of how to get FreeRTOS running on Seeed production. The project can be used as a template to build your projects off of as well.

Using the Meow Meow you can make anything into a key just by connecting a few alligator clips

Simple way to control your IOT development boards like ESP8226, ESP32, Arduino SAMD21, Adafruit SAMD21, SAMD51, nRF52, STM32, Teensy, SAM DUE with Amazon Alexa or Google Home

TinyDraw is a package of drawing primitives on TinyGo displays.

Fast-PWM library for SAMD21-based Arduinos (so far: the Nano 33 IoT, the Adafruit Trinket M0, the Zero (untested), and the MKR series (untested))

Functions for many of the ADC capabilities of the ATSAMD21 series.

Arduino logic for throttle controller

Library Helpers for the Atmel SAM21D

Building an embedded Rust application on top of the ASF4 C vendor library

This library enables you to use Interrupt from Hardware Timers on an SAMD-based board. These SAMD Hardware Timers, using Interrupt, still work even if other functions are blocking. Moreover, they are much more precise (certainly depending on clock frequency accuracy) than other software timers using millis() or micros(). That's mandatory if you need to measure some data requiring better accuracy. It now supports 16 ISR-based Timers, while consuming only 1 Hardware Timer. Timers' interval is very long (ulong millisecs). The most important feature is they're ISR-based Timers. Therefore, their executions are not blocked by bad-behaving functions or tasks. This important feature is absolutely necessary for mission-critical tasks.

Simple EthernetWebServer library for Teensy, SAM DUE, SAMD21, SAMD51, nRF52, ESP32, ESP8266, STM32, RP2040-based, etc. boards using Ethernet shields W5100, W5200, W5500, ENC28J60 or Teensy 4.1 NativeEthernet/QNEthernet. It now supports Ethernet TLS/SSL Client. The library supports HTTP/HTTPS GET and POST requests, provides argument parsing, handles one client at a time. It supports Arduino boards (SAM DUE, Atmel SAM3X8E ARM Cortex-M3, SAMD21, SAMD51, ESP8266, ESP32, Adafruit nRF52, Teensy boards) using Wiznet W5x00 or ENC28J60 network shields.

Light-Weight WiFi/Credentials Manager for AVR Mega, Teensy, SAM DUE, SAMD, STM32, etc. boards running U-Blox WiFiNINA modules/shields. Powerful-yet-simple-to-use feature to enable adding dynamic custom parameters.