CO2 Soil Respiration Chamber

Developed during the RandeLab Soil Retreat as part of the HUMUS.Sapiens research phase and discussed on the forum.

See Hackteria Website

BambooBox
Further developments during dusjagr's residency at Lifepatch June - August 2018



Teensy Code
See RandeLab repo on GitHub

results on our-sci
https://app.our-sci.net/#/survey/by-form-id/build_Randen-Soil-Chamber-Measurement-with-the-Soil-Chamber-built-at-Randelab_1525625829

using this script: https://gitlab.com/our-sci/measurement-scripts/tree/master/mh-z16-randen

Respiration measurement Lifepatch rooftop


1st measurement, late afternoon



2nd measurement, noon



Respiration measurement Lifepatch frontyard
1st measurement around noon





Tibor's rice experiment





CO2 absorbtion with NaOH crystals




Beach Sand | dried and rewetted




Soil Geeking @ Lifepatch with Matt
Great opportunity to do some testing and sharing of protocols with Matthew Daniel from Global Urban Forest. This turned out to be a great little gathering of overlapping networks from GOSH, our-sci, hackteria and the local soil, gardening and permaculture geeks around Lifepatch.

Using the Our-Sci Platform


https://app.our-sci.net/#/survey



More about CO2 sensors:
See RandeLab GitHub for Arduino / Teensy codes

Sensirion SCD30


https://www.sensirion.com/en/environmental-sensors/carbon-dioxide-sensors-co2/

MH-Z16, available with an I2C board:

 * https://sandboxelectronics.com/?product=mh-z16-ndir-co2-sensor-with-i2cuart-5v3-3v-interface-for-arduinoraspeberry-pi

MH-Z19:


This page is about the MH-Z19 CO2 sensor and some experiments done with it:
 * https://revspace.nl/MHZ19

Using the MH-Z19 CO2 sensor PWM readout, simple arduino code:
 * https://electronics.stackexchange.com/questions/262473/mh-z19-co2-sensor-giving-diferent-values-using-uart-and-pwm


 * https://www.mikrocontroller.net/topic/386920

More on ABC, Automatic Baseline Correction


 * https://www.co2meter.com/blogs/news/9290675-automatic-background-calibration-abc-in-senseair-co2-sensors-explained

Immerhin kann man den Sensor per Hd-Pin (7s gegen GND) auf 400ppm (Außenluft) eichen.


 * https://github.com/letscontrolit/ESPEasy/issues/466

CCS811
CCS BME combo



https://learn.sparkfun.com/tutorials/ccs811bme280-qwiic-environmental-combo-breakout-hookup-guide#resources--going-further

This one I ordered 2.... but check I2C adress. and connect "WAK" to GND
 * #define CCS811_ADDR 0x5A //Alternate I2C Address
 * myBME280.settings.I2CAddress = 0x76;

https://www.tindie.com/products/onehorse/air-quality-sensors/