118 lines
4.7 KiB
Markdown
118 lines
4.7 KiB
Markdown
# CO<sub>2</sub> Ampel
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[](https://drone.makerlab-murnau.de/CO2-ampel/software)
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*CO<sub>2</sub> Ampel* is an open-source project, written in C++ for [ESP8266](https://en.wikipedia.org/wiki/ESP8266) or [ESP32](https://en.wikipedia.org/wiki/ESP32).
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It measures the current CO<sub>2</sub> concentration (in ppm), and displays it on an LED ring.
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The room should be ventilated as soon as one LED turns red.
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## Features
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The *CO<sub>2</sub> Ampel* can:
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* Display CO2 concentration on LED ring.
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* Allow calibration.
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* Get current time over [NTP](https://en.wikipedia.org/wiki/Network_Time_Protocol)
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* Send data over [MQTT](https://en.wikipedia.org/wiki/MQTT).
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* Send data over [LoRaWAN](https://en.wikipedia.org/wiki/LoRa#LoRaWAN).
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* Display measurements and configuration on a small website.
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* Log data to a [CSV](https://en.wikipedia.org/wiki/Comma-separated_values) file, directly on the ESP flash memory.
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* Accept many interactive commands.
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## Hardware Requirements
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* [ESP8266](https://en.wikipedia.org/wiki/ESP8266) or [ESP32](https://en.wikipedia.org/wiki/ESP32) microcontroller (this project has been tested with *ESP8266 ESP-12 WIFI* and *TTGO ESP32 SX1276 LoRa*)
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* [Sensirion SCD30](https://www.sensirion.com/en/environmental-sensors/carbon-dioxide-sensors/carbon-dioxide-sensors-co2/) "Sensor Module for HVAC and Indoor Air Quality Applications"
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* [NeoPixel Ring - 12](https://www.adafruit.com/product/1643), or [NeoPixel Ring - 16](https://www.adafruit.com/product/1463) (experimental)
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See the [documentation](https://transfer.hft-stuttgart.de/gitlab/co2ampel/ampel-documentation) for more info.
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## Software Requirements
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* [PlatformIO](https://platformio.org/)
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or
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* [Arduino IDE](https://www.arduino.cc/en/software)
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## Installation
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* If `config.h` does not exist, copy it from `config.public.h`
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* Modify `config.h`, e.g. for measurement time-steps, WiFi access, MQTT, NTP and web-server.
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### PlatformIO
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PlatformIO can be run from [VSCODE](https://platformio.org/install/ide?install=vscode), [Eclipse CDT](https://www.eclipse.org/cdt/) or console:
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```bash
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make upload board=esp8266 && make monitor # For ESP8266
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```
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```bash
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make upload board=esp32 && make monitor # For ESP32
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```
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### Arduino IDE
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* All the libraries are included in this repository. No need to install anything via *Library Manager*.
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* Add your board to the [board manager](https://github.com/esp8266/Arduino#installing-with-boards-manager). Either ESP8266:
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http://arduino.esp8266.com/stable/package_esp8266com_index.json
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or ESP32:
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https://dl.espressif.com/dl/package_esp32_index.json
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* Choose the correct board in *Tools > Board > ...*
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* Choose the correct *Flash size* (e.g. "Flash Size : 4MB (1MB FS, OTA:~1019kB)" for *ESP8266 ESP-12 WIFI*)
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* *Verify*
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* *Upload*
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* *Tools > Serial Monitor*
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## Available commands
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In Arduino IDE *Serial Monitor* or PlatformIO *Monitor*, type `help` + <kbd>Enter</kbd> in order to list the available commands:
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* `auto_calibrate 0/1` (Disables/enables autocalibration).
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* `calibrate` (Starts calibration process).
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* `calibrate 600` (Starts calibration process, to given ppm).
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* `calibrate! 600` (Calibrates right now, to given ppm).
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* `co2 1500` (Sets co2 level, for debugging purposes).
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* `color 0xFF0015` (Shows color, specified as RGB, for debugging).
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* `csv 60` (Sets CSV writing interval, in s).
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* `format_filesystem` (Deletes the whole filesystem).
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* `free` (Displays available heap space).
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* `local_ip` (Displays local IP and current SSID).
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* `lora 300` (Sets LoRaWAN sending interval, in s).
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* `mqtt 60` (Sets MQTT sending interval, in s).
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* `night_mode` (Toggles night mode on/off).
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* `reset` (Restarts the ESP).
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* `reset_scd` (Resets SCD30).
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* `send_local_ip` (Sends local IP and SSID via MQTT. Can be useful to find sensor).
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* `set_time 1618829570` (Sets time to the given UNIX time).
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* `show_csv` (Displays the complete CSV file on Serial).
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* `timer 30` (Sets measurement interval, in s).
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* `wifi_scan` (Scans available WiFi networks).
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The commands can be sent via the Serial interface, from the webpage or via MQTT.
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## Authors
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* Eric Duminil (HfT Stuttgart)
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* Robert Otto (HfT Stuttgart)
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* Myriam Guedey (HfT Stuttgart)
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* Tobias Gabriel Erhart (HfT Stuttgart)
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* Jonas Stave (HfT Stuttgart)
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* Michael Käppler
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## Contributing
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* Merge requests are welcome, and should be based on the `develop` branch.
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* The `develop` branch gets merged into the `master` once it has been sufficiently tested.
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* For major changes, please open an issue first to discuss what you would like to change.
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## License
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Copyright © 2021, [HfT Stuttgart](https://www.hft-stuttgart.de/)
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[GPLv3](https://choosealicense.com/licenses/gpl-3.0/)
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