> For the complete documentation index, see [llms.txt](https://docs.ruuvi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ruuvi.com/ruuvi-firmware.md).

# RuuviTag Firmware

- [1.2.12](https://docs.ruuvi.com/ruuvi-firmware/1.2.12.md): Lifecycle: Obsolote
- [2.5.9](https://docs.ruuvi.com/ruuvi-firmware/2.5.9.md)
- [3.X](https://docs.ruuvi.com/ruuvi-firmware/3.x.md): Lifecycle: Alpha. Last updated 2020-09-10
- [3.x Sensors](https://docs.ruuvi.com/ruuvi-firmware/3.x/3.x-sensors.md): Lifecycle: in production
- [3.x Heartbeat](https://docs.ruuvi.com/ruuvi-firmware/3.x/3.x-heartbeat.md): Lifecycle: in production
- [Device Firmware Update (DFU)](https://docs.ruuvi.com/ruuvi-firmware/device-firmware-update-dfu.md): Lifecycle: In production