r4

Firely and Incendi's open source FHIR server

FHIR R4 to Swagger Converter Tool

r3 virtual machine, succesor of :r4

A stack-based VM/CPU with human-readable machine language

Arduino R4 WiFi HTTP webserver (porting of ESP32 Arduino Core WebServer library)

Using @radio4000/components' <r4-app/>

API for interacting with Renta4 (r4.com)

Arduino UNO R4 Minima Soccer forecast with Machine Learning (Edge Impulse)

Generated library for HL7 FHIR R4 (4.0.1)

Singularity recipies for singularity-hub

r4

Arduino_Base is a repo consisting of files specifically made for the Arduino Uno R4 board.

A FHIR search query validator that makes use of FHIR server's capability statement

Custom kernel in rust for Arduino Uno R4 WiFi clones. Use and install at your own risk.

Searching for a DMX library for R4 Wifi

Top 5 Open Source FHIR Plugin R5 Tools 2026 – Source-Aware JSON Guidance

Accuracy-first Claude plugin for FHIR R4/R4B/R5 JSON guidance with source-aware claim labeling and clear validation boundaries

A .Net Core version of FhirStarter - which hopefully can be adjusted to fit with any FHIR versjon

My projects with Arduino R4 and Arduino R4 WiFi Projects

dark blue nds theme for various homebrew enabling flashcard firmwares