weewx-temperaturnu

A WeeWX extension that uploads weather data to Temperatur.nu

Overview

weewx-temperaturnu is a WeeWX extension that automatically uploads your weather station's temperature data to Temperatur.nu, a Swedish weather data collection service. The extension is designed to be lightweight and simple, requiring no external Python dependencies.

Features

• ✅ Automatic temperature conversion to Celsius using WeeWX unit helpers
• ✅ Lightweight with zero external dependencies
• ✅ Compatible with Python 2.7+ and Python 3.x
• ✅ Works with WeeWX v3.8.0 and later
• ✅ Support for both WeeWX v4 and v5 installers
• ✅ Simple configuration via weewx.conf

Requirements

• Python: 2.7+ or 3.x
• WeeWX: v3.8.0 or later
• API Key: from Temperatur.nu
• External Libraries: None (uses only Python standard library)

Installation

Step 1: Get an API Key

Visit Temperatur.nu New Station to register your weather station and obtain an API key.

Step 2: Download the Extension

wget -O weewx-temperaturnu.zip https://github.com/rc-chuah/weewx-temperaturnu/archive/master.zip

Step 3: Install the Extension

For WeeWX v4 and earlier:

wee_extension --install weewx-temperaturnu.zip

For WeeWX v5:

weectl extension install weewx-temperaturnu.zip

Step 4: Configure

Edit /etc/weewx/weewx.conf and add the following section:

[StdRESTful]
    [[TemperaturNu]]
        apikey = YOUR_API_KEY_FROM_TEMPERATUR.NU

Optional configuration parameters:

[StdRESTful]
    [[TemperaturNu]]
        # Your API key from temperatur.nu (required)
        apikey = YOUR_API_KEY_HERE
        
        # Enable or disable uploads (default: true)
        enabled = true
        
        # Server URL (default: https://www.temperatur.nu/rapportera.php)
        server_url = https://www.temperatur.nu/rapportera.php

Step 5: Restart WeeWX

sudo systemctl restart weewx

How It Works

The extension performs the following tasks:

1. Monitors archive records from your WeeWX weather station
2. Extracts the outdoor temperature (outTemp)
3. Converts temperature to Celsius (if your station uses Fahrenheit or other units)
4. Uploads the temperature data to Temperatur.nu via HTTP GET for each new archive record

Temperature Conversion

The extension automatically converts your weather station's temperature to Celsius using WeeWX's built-in weewx.units.to_METRICWX() helper function. This ensures accuracy regardless of your station's native unit system.

Example Conversions

Fahrenheit	Celsius
32°F	0°C
68°F	20°C
72.5°F	22.5°C
212°F	100°C

Upload Method

This extension uses HTTP GET to upload data to Temperatur.nu with the following format:

GET /rapportera.php?hash=YOUR_API_KEY&t=22.5 HTTP/1.1
Host: www.temperatur.nu

Troubleshooting

Check WeeWX Logs

tail -f /var/log/syslog | grep temperaturnu

Enable Debug Logging

Add to /etc/weewx/weewx.conf:

debug = 2

Then restart WeeWX:

sudo systemctl restart weewx

Test the Extension Manually

cd /usr/share/weewx
PYTHONPATH=bin python bin/user/temperaturnu.py

Expected output:

Test 1 - US Units (Fahrenheit):
https://www.temperatur.nu/rapportera.php?hash=test_key_12345&t=22.5

Test 2 - Metric Units (Celsius):
https://www.temperatur.nu/rapportera.php?hash=test_key_12345&t=22.5

Common Issues

Issue	Solution
No data uploading	Verify API key in weewx.conf is correct
Temperature missing	Ensure your station records temperature (outTemp)
Connection errors	Check internet connectivity; test URL with curl
Wrong temperature	Check your station's unit system setting

Test Manually with curl

curl "https://www.temperatur.nu/rapportera.php?hash=YOUR_API_KEY&t=20"

Dependencies

This extension uses only Python's standard library. The following modules are utilized:

• Queue (Python 2) / queue (Python 3)
• urllib / urllib.parse (Python 3)
• sys
• time
• logging / syslog

No external pip packages are required.

License

Copyright © 2026 RC Chuah

Distributed under the terms of the GNU General Public License (GPLv3)

Credits

• Original Concept: Based on weewx-windy by Matthew Wall and Jacques Terrettaz
• Modified for Temperatur.nu: RC Chuah

Links

• WeeWX: https://www.weewx.com/
• Temperatur.nu: https://www.temperatur.nu/
• WeeWX Documentation: https://www.weewx.com/docs/
• weewx-windy: https://github.com/Jterrettaz/weewx-windy