# F5OEO/rpitx

RF transmitter for Raspberry Pi

Repository: https://github.com/F5OEO/rpitx
Canonical: https://ross.abutalabs.com/products/rpitx
Language: C
License: GPL-3.0
License Family: copyleft
Last push: 2024-09-30T20:25:54+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3969, "days_push": 702, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4527, forks 585 (observed 2026-08-28T04:08:52.904602+00:00)

## What it is
rpitx is a general RF transmitter for Raspberry Pi that generates radio signals from 5 KHz to 1500 MHz using only a GPIO-connected wire antenna, with no extra hardware. It supports various modulations (FM, AM, SSB, SSTV, spectrum painting) and is intended for RF education and experimentation.

## Use cases
- transmit RF signals from a Raspberry Pi without extra hardware
- generate an FM broadcast with RDS from a Pi
- paint images into an RF spectrum waterfall viewed with an SDR
- experiment with chirp and carrier signals on the ISM band
- learn how software-defined RF transmission works
- send SSTV or POCSAG signals from a Raspberry Pi

## When to choose
- you want to experiment with RF transmission using only a Raspberry Pi and a wire antenna
- you need an educational tool for learning about radio frequency modulation
- you want to transmit low-power signals on ISM bands for testing with an SDR receiver

## When to avoid
- you need a legally compliant certified transmitter for real broadcasts
- you are on a Raspberry Pi 4 and require fully stable operation
- you cannot attach a proper band-pass filter and want to avoid interference

## Facets
- artifact type: application
- maturity: active
- function: embedded, simulation, developer-tools
- domain: hardware, embedded-systems
- platform: embedded
- tags: rf-transmitter, raspberry-pi, sdr, ham-radio, gpio, fm-transmission, ism-band, radio, linux

## Member repositories
- F5OEO/rpitx (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:52.904602+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 2026-08-29T18:20:14.740273+00:00, confidence not recorded.
  - readme: https://github.com/F5OEO/rpitx (fetched 2026-08-28T04:08:52.904602+00:00, sha 40c70679b6bc)
- Data as of 2026-08-30T08:39:29.467469+00:00.