Examples

RIOT provides a wide range of examples to demonstrate the capabilities of the OS and its modules.

Each example contains a README.md that provides information and instructions how to run it.

Here is a quick overview of the examples available in the RIOT:

The Essentials

Example	Description
default	This application is a showcase for RIOT's hardware support. Using it for your board, you should be able to interactively use any hardware that is supported.
hello-world	A simple "Hello World" that shows the basic structure of a RIOT application.
blinky	The classic "Hello World" example for embedded systems: blinking an LED (or printing "Blink!" via stdio when none are available).
leds_shell	The application leds_shell is a basic example, which allows easy, interactive control of internal board LEDs, and basic GPIO for externally connected simple devices (for e.g. additional LEDs, relay, motors - via dedicated drivers, etc.) via the shell.
saul	This example demonstrates the usage of the SAUL (Sensor Actuator Uber Layer) module.
timer_periodic_wakeup	How to set up a periodic wakeup timer using the RIOT operating system.
ipc_pingpong	This example is to illustrate the usage of RIOTs IPC messaging system.
filesystem	This example showcases ways to interact/manage the filesystem in RIOT.
subfolders	This example demonstrates how to use subfolders in RIOT applications.

RIOT Language Bindings

Officially Supported/Targeted

Rust

Example	Description
rust-hello-world	This example demonstrates how to write a simple RIOT application in Rust.
rust-gcoap	This example demonstrates how to write a coap server application in Rust using the RIOTs gcoap module.
rust-async	This example demonstrates how to use Rusts async/await syntax in a RIOT application.

C++

Example	Description
riot_and_cpp	Example of using C++ in RIOT applications.

Community Supported

Example	Description
javascript	How to write IoT applications using javascript using JerryScript.
lua_basic	How to write IoT applications using Lua.
lua_REPL	This example demonstrates how to use the Lua Read-Eval-Print Loop (REPL) in RIOT.
micropython	How to use the MicroPython port for RIOT.
wasm	How to use WebAssembly in RIOT.
arduino_hello-world	This application demonstrates the usage of Arduino sketches in RIOT.

Networking

Constraint Application Protocol (CoAP)

Example	Description
gcoap	This example demonstrates the usage of the gcoap module, a high-level API for CoAP (Constrained Application Protocol) messaging.
gcoap_block_server	CoAP server handling for Block requests, build with gcoap using nanocoap block handling functions.
gcoap_fileserver	This example demonstrates the usage of the gcoap module to serve files over CoAP.
gcoap_dtls	This example demonstrates the usage of the gcoap module with DTLS.
nanocoap_server	This example demonstrates the usage of the nanocoap module, a high-level API for CoAP (Constrained Application Protocol) messaging.

Bluetooth Low Energy (BLE)

NimBLE

Example	Description
nimble_scanner	This example showcases the usage of the NimBLE BLE stack as a scanner.
nimble_gatt	This example application configures and runs the NimBLE BLE stack as simple GATT server.
nimble_heart_rate_sensor	This example demonstrates how to implement asynchronous data transfer using GATT notifications by implementing a mock-up BLE heart rate sensor.

Misc BLE Examples

Example	Description
skald_eddystone	This example demonstrates the usage of Skald for creating an Google Eddystone beacon.
skald_ibeacon	This example demonstrates the usage of Skald for creating an Apple iBeacon.

MQTT

Example	Description
asymcute_mqttsn	This application demonstrates the usage of the Asymcute (MQTT-SN) module in RIOT.
emcute_mqttsn	This application demonstrates the usage of the emCute (MQTT-SN) module in RIOT.
paho-mqtt	This example demonstrates the usage of the Paho MQTT client library in RIOT.

CoRE Resource Directory

Example	Description
cord_ep	Example of RIOT's Resource Directory (RD) endpoint module, called cord_ep
cord_lc	Example of RIOT's Resource Directory (RD) lookup module, called cord_lc
cord_epsim	This example shows how a node can register with a CoRE resource directory

GNRC Networking

Example	Description
gnrc_minimal	This is a minimalistic example for RIOT's gnrc network stack.
gnrc_networking	This example demonstrates the usage of the GNRC network stack in RIOT.
gnrc_networking_subnets	This example demonstrates IPv6 subnet auto-configuration for networks on a tree topology.
gnrc_border_router	Example of gnrc_border_router using automatic configuration
gnrc_lorawan	Send and receive LoRaWAN packets and perform basic LoRaWAN commands
gnrc_networking_mac	This example shows you how to try out communications between RIOT instances with duty-cycled MAC layer protocols

DTLS

Example	Description
dtls-sock	This example shows how to use DTLS sock sock_dtls_t
dtls-echo	This example shows how to use TinyDTLS with sock_udp.
dtls-wolfssl	This example demonstrates the usage of the DTLS module with the wolfSSL library.

Misc

Example	Description
lorawan	This application shows a basic LoRaWAN use-case with RIOT.
openthread	This example demonstrates the usage of the OpenThread stack in RIOT.
lwm2m	Example of a LWM2M client on RIOT
ccn-lite-relay	This application demonstrates how to use the Content-Centric Networking stack from CCN-Lite on RIOT
telnet_server	Simple telnet server that listens on port 23 over IPv6.
posix_sockets	Showcase for RIOT's POSIX socket support
spectrum-scanner	This example demonstrates how to monitor energy levels on all available wireless channels
sniffer	This application is built to run together with the script ./tools/sniffer.py as a sniffer for (wireless) data traffic.
benckmark_udp	This example uses the benchmark_udp module to create a stress-test for the RIOT network stack.
sock_tcp_echo	This is a simple TCP echo server / client that uses the SOCK API.

Advanced Examples

Example	Description
bindist	RIOT allows for creating a "binary distribution", which can be used to ship proprietary, compiled objects in a way that makes it possible to re-link them against a freshly compiled RIOT. This application serves as a simple example.
usbus_minimal	This is a minimalistic example for RIOT's USB stack.
suit_update	This example shows how to integrate SUIT-compliant firmware updates into a RIOT application.
thread_duel	This is a thread duel application to show RIOTs abilities to run multiple-threads concurrently, even if they are neither cooperative nor dividable into different scheduler priorities, by using the optional round-robin scheduler module.
posix_select	This example is a showcase for RIOT's POSIX select support
psa_crypto	Basic functions of the PSA Crypto API
pio_blink	How to use the PIO peripheral on the RaspberryPi Pico to blink an LED.
twr_aloha	This example allows testing different two-way ranging algorithms between two boards supporting a dw1000 device. This makes use of the uwb-core pkg.
senml_saul	This example demonstrates the usage of the SAUL (Sensor Actuator Uber Layer) module with the SenML (Sensor Measurement Lists) format.
opendsme	This example demonstrates the usage of the OpenDSME module in RIOT.