App for reading CO2 ppm from MH-Z19 sensor and saving to a local csv file.

🌐 Web App - Visualize Your Data

CO2 Logger Viewer — Plug in your Flipper, click connect, and instantly see your CO2 data as an interactive chart. No drivers, no apps, just your browser.

Credits

This project is based on the original MH-Z19 UART app by Aku. Enhanced with CSV logging functionality for data collection and analysis.

Pinout

Flipper	Sensor
1	5V
8	GND
15	RX
16	TX

CSV Logging

The app automatically creates a CSV file at /ext/apps_data/co2_logger/co2_log.csv on the SD card and logs valid CO2 readings at the configured interval with the following format:

Timestamp,CO2_PPM 2024-01-15 14:30:25,420 2024-01-15 14:30:55,425

The CSV file includes:

• Timestamp in YYYY-MM-DD HH:MM:SS format
• CO2 concentration in PPM

Data Quality Features:

• Configurable logging intervals: 15s, 30s, or 60s (default: 30s)

Features

• Auto-Dim Control: Toggle the automatic screen dimming functionality in settings. When disabled, the screen will stay bright during use.
• Configurable Logging: Set logging intervals of 15s, 30s, or 60s to match your monitoring needs.
• CSV Logging Toggle: Enable or disable CSV file logging in settings. When enabled, CO2 readings are saved to the SD card.