Yes, @Deschutes, the picture above is how I captured those readings. It’s a GPS enabled, cloud based, portable soil probe that reads moisture, EC, soil temperature, canopy temperature and soil salinity. I sell these to people maintaining high end turf i.e. golf courses and sports turf managers.
I have talked some on where Rachio falls short on soil moisture but they do an adequate job for the cost of their controller. I have actually taken many readings in my own yard and if setup properly they track the needs of the turf fairly well. I’m just north of Houston, Tx and I haven’t seen much rain in the last two months with temperatures over a 100 degrees(actually breaking 100yr old records). My yard is holding up fairly well and I’m restricted to only watering two days a week.
This area was watered yesterday morning and has to make it to Tuesday morning before it waters again.
I believe their are a few guys in this community that are in harsher environments than me and do quite well with the Rachio. They are also willing to share that knowledge with others. The technology is definitely available to get the readings you seek but what would you be willing to pay for such technology?