SwiftTemp

SwiftUI menu bar app that shows the current temperature in Fahrenheit and Celsius, plus sun timing, UV index, and AQI.

Caution

This app was "vibe coded" with Opus 4.6, GPT-5.4, and Sonnet 4.6. Do not use it as is, do not trust this code!

Notes

• This version is intentionally minimal: one Swift source file plus this README.
• It uses IP-based geolocation instead of CoreLocation, so it does not need app bundles, entitlements, or location permission prompts.
• Weather and air-quality data come from Open-Meteo. IP lookup comes from ipapi.co.
• If YoLink credentials are configured, the menu bar temperature comes from your YoLink temperature/humidity sensor and the weather APIs remain fallbacks/context.

Build

git clone <your-repo-url>
cd SwiftTemp
swiftc -parse-as-library -framework SwiftUI -framework AppKit -o SwiftTemp SwiftTemp.swift

Run

./SwiftTemp

The app lives in the macOS menu bar and refreshes automatically every 10 minutes.

YoLink Outdoor Sensor

YoLink support is optional. Without these values, SwiftTemp keeps using the existing NWS/Open-Meteo source.

1. In the YoLink app, create Personal Access Credentials from Account -> Advanced Settings -> Personal Access Credentials.
2. Run the app with the credential values:

YOLINK_UAID="..." YOLINK_SECRET="..." ./SwiftTemp

If your account has more than one YoLink THSensor, SwiftTemp shows a YoLink Sensor picker in the menu and remembers your choice. You can also hard-code a device with exact device values:

YOLINK_UAID="..." \
YOLINK_SECRET="..." \
YOLINK_DEVICE_ID="..." \
YOLINK_DEVICE_TOKEN="..." \
YOLINK_DEVICE_NAME="Outdoor North Side" \
./SwiftTemp

You can get YOLINK_DEVICE_ID and YOLINK_DEVICE_TOKEN from YoLink's Home.getDeviceList API response. The app calls THSensor.getState every 10 minutes and displays the reported temperature, humidity, and report age.

Launch At Startup

Because this project is a bare executable rather than a bundled .app, the simplest startup option is a per-user launchd agent managed by the included script.

1. Build the binary:

swiftc -parse-as-library -framework SwiftUI -framework AppKit -o SwiftTemp SwiftTemp.swift

2. Add it to startup:

./startup.sh add

If you use YoLink, set the YoLink environment variables when adding or updating the login item so launchd can pass them to the app:

YOLINK_UAID="..." YOLINK_SECRET="..." ./startup.sh add

3. If you rebuild the binary later, reload the login item:

./startup.sh update

4. To remove it from startup:

./startup.sh remove

The script writes ~/Library/LaunchAgents/com.kastner.swifttemp.plist pointing at the SwiftTemp binary in this checkout. If you move the checkout, run ./startup.sh update.