swarmfw

Firmware connecting SDI-12 sensors to SWARM satellite platform. We are using https://swarm.space as a platform to send messages from sensors. For the SWARM tile documentation see here https://swarm.space/wp-content/uploads/2021/06/Swarm-Tile-Product-Manual.pdf.''

More detailed documentation: https://thenatureconservancy462-my.sharepoint.com/personal/falk_schuetzenmeister_tnc_org/_layouts/15/guestaccess.aspx?guestaccesstoken=TmH7KIxDQDfbI0Vy9R8S%2FkfB7j3kXaVDi9jCohYKpVg%3D&docid=2_01858cbd5b9bd4ad3a21f8853b36897c2&rev=1&e=bt5SxO

Current payload configuration/payload

Sensors:

2 In-situ Level Troll 300/500/700 (please stay with default configuration) https://in-situ.com/pub/media/support/documents/SDI-12_Commands_Tech_Note.pdf

3 Campbell Scientific CV50 https://www.campbellsci.com/climavue-50

4 TekBox Leaf Wetness https://www.tekbox.com/product/tbslws1-sdi-12-leaf-wetness-sensor/

5 Meter Soil Moisture Teras 12 https://www.metergroup.com/environment/products/teros-12/

Message format:

Example message:

000549,1638633620,3.59,SC,51,+26+0.000+0+0+0.93+246.3+2.65+11.0+1.18+100.83+0.900+10.8+0.2+1.7+0-0.38-0.86+2.65,52,+0.00,53,+2038.84+16.1+39

Fields

index ... number of messages since last reboot

unix epoch time stamp

battery voltage

message type

SC ... SDI-12 messsage agquired with the ?C! command

array of SDI-12 messages in the form

• sensor address as number (48 = '0')

• concatenated sensor response from (?D1! ...)

SDI-12 sensor at address 50 ('2'): In-Situ Level Troll

1. pressure in PSI

2. temperature in C

SDI-12 sensor at address 51 ('3'): CV50 at address 51

1. Solar flux density
2. Precipitation
3. Lightning strike count
4. Strike distance
5. Wind speed
6. Wind direction
7. Maximum wind speed
8. Air temperature
9. Vapor pressure
10. Barometric pressure (absolute)
11. Relative humidity
12. Humidity sensor temperature
13. Tilt North(+)/South(–) orientation
14. Tilt West(+)/East(–) orientation
15. Compass heading (disabled)
16. North wind speed
17. East wind speed
18. Wind speed max. – 10 s gust

SDI-12 sensor at address 52 ('4'): Tekbox leafwetness in %

SDI-12 sensor at address 53 ('5'): Meter Teras12

see http://manuals.decagon.com/Integrator%20Guide/18224%20TEROS%2011-12%20Integrator%20Guide.pdf

1. calibratedCountsVWC
2. temperature
3. electricalConductivity

Sensor documentation

in-situ

https://in-situ.com/pub/media/support/documents/short_stripped_tinned_cable.pdf