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[Feature Request] Add regional frequency preset for South Korea (KR920-923)

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
48/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Active
Tech stack
c
Domain
embedded-iot, networking

Research direction

Start by locating the existing regional frequency presets and how their radio parameters are represented. Compare those presets with the proposed KR920 range, center frequency, bandwidth, spreading factor, coding rate, and transmit power. The issue gives no file or test names; done means adding a South Korea preset consistent with the project’s preset conventions and checking its parameter values.

Written by the indexing model from the issue text.

Description

  1. Proposed Region Name & Identifier
    Region / Country Name: South Korea (KR or KR920)
    Intent: Provide out-of-the-box compliance, efficient airtime usage, and ease of use for local South Korean mesh communities without requiring manual frequency calibration.

  2. Core Radio Parameters (Optimized Technical Array)
    Frequency Range: 917.0 MHz – 923.5 MHz
    Center Frequency / Channel 0: 921.9 MHz (aligned with standard local sub-band deployment)
    Bandwidth (BW): 125 kHz
    Spreading Factor (SF): SF7 or SF8 (optimized for lower packet airtime, faster network responsiveness, and strict adherence to local duty cycle/channel occupancy limits)
    Coding Rate (CR): 4/5
    Max Transmit Power: 10 dBm to 14 dBm (approx. 10mW–25mW EIRP limit compliance)

  3. Legal Justification & Regulatory Citation
    Governing Body: MSIT (Ministry of Science and ICT / 과학기술정보통신부) of South Korea.
    Legal Framework: South Korea Radio Waves Act (전파법).
    Specific Standard: Technical Standards for Radio Equipment for Radio Stations That Can Be Established Without Notice (신고하지 아니하고 개설할 수 있는 무선국용 무선설비의 기술기준), specifically under RFID/USN and Data Transmission Low-Power Devices.

Dominant language
C
Stars
3.9k
Forks
1.5k
Avg merge
1d 1h
Merged PRs (30d)
26

Getting set up

This project ships no dev container, Dockerfile or contributing guide, so setting up is up to you: start from its README, and see our first-contribution guide for the general steps.

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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