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defmt-rtt

v1.1.0 Growing

Transmit defmt log messages over the RTT (Real-Time Transfer) protocol

MIT OR Apache-2.0 Edition 2021
Embedded developmentNo standard library #knurling#defmt#defmt-transport

Quick Verdict

  • Stable API (1.x for 5+ years)
  • Trusted by 483 crates
  • Team maintained (4 owners)
  • Tiny footprint (7KB, 2 deps)
  • Permissive license (MIT OR Apache-2.0)

Security

Checking security advisories...
Downloads
2.0M
Dependents
483
Releases
11
Size
7KB

Deep Insights

📊
Stable downloads

147.1K downloads in the last 30 days (4.9K/day). Volume is roughly flat compared to the previous period.

🔗
Moderate adoption

483 crates depend on defmt-rtt. Reasonable ecosystem adoption, though not yet a core dependency.

👤
Prolific maintainer

The primary maintainer publishes 92 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

Stable for 5+ years

The API has been stable (1.x) for over 5 years with 11 releases. This level of maturity means you can depend on it without worrying about breaking changes.

🪶
Minimal dependencies

Only 2 direct dependencies. Lean dependency tree means faster builds and lower supply chain risk.

📐
Compact crate

At 7KB, defmt-rtt is lightweight. Small crate size correlates with focused, well-scoped functionality.

🌟
Used by top crates

Notable dependents include stm32f4xx-hal, rp-pico, ssd1306, persistent-buff, stm32f3xx-hal. When high-quality crates choose defmt-rtt, it's a strong quality signal.

Health Breakdown

Maintenance 10/25

Recency, release consistency, active ratio

Quality 20/25

Yanked ratio, deps, size, maturity, features

Community 18/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 10/15

Docs, repo, license, metadata

Download Trend

Daily downloads · last 90 days
5K/day avg-3%
02K4K6K8K10K12/291/162/32/213/113/28

Top Dependents

Version Adoption

v0.4.1
27%
v0.4.0
22%
v0.4.2
21%
v1.1.0
18%
v1.0.0
12%

Release Timeline

11 releasessince 2020
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2020
1
2021
3
2022
2
2023
2024
1
2025
4
2026
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Feature Flags

disable-blocking-mode

README

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Maintainers

Dependencies
2
direct dependencies
Dependents
483
crates depend on defmt-rtt

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