v6.0 increase battery life to up to 11 weeks

What's Changed

On Battery: New default to low energy mode with a smart algorithm to only measure CO2, if the temperature changed by more than 0.5°C or the humidity by 2% or 5 minutes passed. Increase battery runtime to up to 11 weeks.

Bugfix: LED color fixed on HWSubRev < 3

Also USB updates are only enabled, if the OpenCO2 Sensor is plugged in already on the first boot.

v5.9 Calibration result displayed by @davidkreidler in #38

Full Changelog: v5.8...v6.000

News: My OpenCO2 Mini Sensor is now available on tindie: https://www.tindie.com/products/davidkreidler/openco2-mini/

v5.8 HWSubRev 3

What's Changed

• Use FastLED library and use new i2c pinout. Shrink fonts. Use light sleep to wait for display update in Battery mode.
• Battery SOC limit option: Limit the max Battery SOC on HWSubRev 3 to 80% to preserve Battery health.
• Remove unused EEPROM commands.
• Bugfix: Menu button not working with wifi and lowEnergyMode enabled.
• Sensor selftest logic fix (in TEST_MODE)
• Enable an update to esp32 version 3.2.1 https://github.com/espressif/arduino-esp32/releases/tag/3.2.1
• HWSubRev 3 by @davidkreidler in #33

New Contributors

• @lispmeister made their first contribution in #34

Full Changelog: v5.7...v5.8

New future Case Design based on a squircle:

v5.7 Low Energy Mode (50 days runtime) + Plotly colors and font size

What's Changed

5.7 Low Energy Mode (50 days runtime) by @davidkreidler in #32

• Change the refresh rate in Battery mode to every 5 min via the Menu -> Display -> Update (5min). This will exend Battery life to about 50 days.

Plotly colors and font size:

• Use dark green for the CO2 title and Graph. Also fill the area below.
• Use red for Temperature and blue for Humidity.
• The GitHub version link now opens a new tab.

Full Changelog: v5.6...v5.7

v5.6 arduino-i2c-scd4x, plotly and ESP32 version update

What's Changed

• arduino-i2c-scd4x 1.0.0 support by @dereckhall in #29
• Enable an update to esp32 version 3.2.0 https://github.com/espressif/arduino-esp32/releases/tag/3.2.0
• Website: plotly uprev and remove 0 values

New Contributors

• @dereckhall made their first contribution in #29

Full Changelog: v5.5...v5.6

v5.5 ESP32 version update 3.1.1

What's Changed

Enable an ESP32 version update (#25)

• Enable an update to esp32 version 3.1.1: https://github.com/espressif/arduino-esp32/releases/tag/3.1.1
• Dark theme for the Websites (see Picture)
• Remove not needed sleep parameters
• Remove Gotham font
• Because of the small ULP memory only stores temperature/humidity every 2 minutes
• Re enable USB mass storage updates

Full Changelog: v5.4...v5.5

V5.4 Snake & Home Assistant

New FUN Menu including Snake:

Readme on how to add the OpenCO2-Sensor to Home Assistant. The hostname was changed to "OpenCO2". This also enables http://openco2:9925/

Thanks @Finkregh

v5.3 Website timing and History graph bugfix

Website graph timing improvement: Store CO2 values exactly every 30 seconds.

History graph:
4.2" display now supports full screen.
Bugfix for min Value.

Full Changelog: v5.2...v5.3

v5.2 WiFi reconnect & rewrite values save

The OpenCO2 Sensor now auto reconnects if the WiFi connection is lost (for example a router reboot).

Code refactoring: Rewrite how values are stored. Now up to 24h of measurements are stored in a ring buffer with automatic overflow handling. This replaces the more complex handling of 24 separate arrays containing measurements for 1h each.

Full Changelog: v5.1...v5.2

v5.1 Website improvements & Bugfix

v5.1 Website improvements & Bugfix
Website improvements:

• timestamps now get generated by the client by only transmitting start- and end time
• transmit values in multiple buffers of data

Update README for machine-readable Measurements

Bugfix:
Wi-Fi menu:

• enable handleClient while displaying the IP
• only start wifiManager when not on battery
• update warning screen when power gets connected

Display:

• Refresh full screen when rainbow mode is exited

Full Changelog: v5.0.1...v5.1

v5.0 new Website inc History

Connect the OpenCO2 Sensor to your home Wi-Fi via the Menu. Then Navigate to http://[IP]:9925 to view current values and an up to 24h history graph for CO2 (every 30 sec) and temperature / humidity (every 1.5 min).

Also enlarged Clock and moved Wi-Fi Symbol

Update WiFiManager tzapu/WiFiManager@v2.0.16-rc.2...v2.0.17

Full Changelog: v4.6...v5.0