# gioblu/PJON

PJON (Padded Jittering Operative Network) is an experimental, arduino-compatible, multi-master, multi-media network protocol.

Repository: https://github.com/gioblu/PJON
Canonical: https://ross.abutalabs.com/products/pjon
Language: C++
License: NOASSERTION
License Family: other
Topics: arduino, attiny, esp32, esp8266, home-automation, iot, lora, protocol, rpi, samd, stm32, teensy, lorawan, mqtt, networking
Last push: 2025-11-21T22:50:23+00:00

## Health v2 (maintenance only)
Score: 47/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 53, release rhythm 8, longevity 100
- inputs: {"age_days": 4294, "days_push": 285, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2816, forks 242 (observed 2026-08-28T04:07:23.825290+00:00)

## What it is
PJON is an experimental, multi-master, software-defined network protocol stack for microcontrollers and general-purpose systems, supporting many media such as serial, RS485, LoRa, UDP, TCP, MQTT, and ESPNOW. It is an Arduino-compatible C++ library with a small footprint, designed as a low-cost alternative to I2C, 1-Wire, and even IP in some scenarios.

## Use cases
- communicate between arduino boards over a single wire
- build a multi-master sensor network for home automation
- send messages between esp32 devices over espnow or lora
- replace i2c or 1-wire with a more resilient bus protocol
- network attiny and teensy microcontrollers over rs485
- bridge microcontroller networks to mqtt or tcp/ip
- connect raspberry pi to arduino over serial

## When to choose
- you need cheap, low-footprint device-to-device networking on microcontrollers
- you want one protocol abstraction over many media like serial, radio, and lora
- you need multi-master communication without extra hardware

## When to avoid
- you need a production-grade, standards-based network stack
- you require high throughput or heavy security features
- you want guaranteed long-term maintenance or a standard license

## Facets
- artifact type: library
- maturity: active
- function: networking, embedded, iot, message-queue
- domain: iot, embedded-systems, networking
- platform: cpp, embedded, windows, iot
- tags: arduino, multi-master, lora, rs485, esp8266, esp32, home-automation, microcontrollers, software-defined-networking, automation, linux, macos, android

## Member repositories
- gioblu/PJON (main) score 47

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:23.825290+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T08:13:27.723870+00:00, confidence not recorded.
  - readme: https://github.com/gioblu/PJON (fetched 2026-08-28T04:07:23.825290+00:00, sha 23e687be0d21)
- Data as of 2026-08-30T08:39:29.467469+00:00.