CO2 Soil Respiration Chamber
Developed during the RandeLab Soil Retreat as part of the HUMUS.Sapiens research phase and discussed on the forum.
UROŠ new CO2 soil chambers
Based on FeatherS2 and new SCD41 Sensor sponsored by Sensirion.
More coming soon!
CO2 soil chambers
BambooBox
Further developments during dusjagr's residency at Lifepatch June - August 2018
Teensy Code
results on our-sci
using this script: https://gitlab.com/our-sci/measurement-scripts/tree/master/mh-z16-randen
PVC pipe Chambers
Wiring diagram
RandeChamber aka Kilju Chamber
Failed PCB...
Test Measurements @ Yogyakarta / Lifepatch
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.
Testing trials in lifepatch garden
Visit to Pak Paning's permaculture farm
Early Experiments
First Prototypes
Comparing sensors and chambers
Using the Our-Sci Platform
https://app.our-sci.net/#/survey
More about CO2 sensors:
See RandeLab GitHub for Arduino / Teensy codes
New Sensirion SCD 4x Optoaccoustic sensor
See some first notes and experiments here: https://mega.hackteria.org/index.php/s/AzikGk77wAdPdqg
See Adafruit libraries and circuitpython examples:
https://github.com/Sensirion/arduino-i2c-scd4x/blob/master/README.md
https://learn.adafruit.com/adafruit-scd-40-and-scd-41/python-circuitpython
Nondispersive infrared sensor
Sensirion SCD30
https://www.sensirion.com/en/environmental-sensors/carbon-dioxide-sensors-co2/
MH-Z16, available with an I2C board:
MH-Z19:
New Library!: https://github.com/WifWaf/MH-Z19
This page is about the MH-Z19 CO2 sensor and some experiments done with it:
Using the MH-Z19 CO2 sensor PWM readout, simple arduino code:
More on ABC, Automatic Baseline Correction
Immerhin kann man den Sensor per Hd-Pin (7s gegen GND) auf 400ppm (Außenluft) eichen.
CCS811
CCS BME combo
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/