Yesterday I connected a ‘freeze sensor’ to my Iro2 that uses a Flex Daily schedule. I don’t have any limitations placed on the Flex Daily schedule - it’s set to start each day (that it determines watering is needed) at 10:15 AM. It covers all zones - there’s only one schedule.
My objective is to see if I can implement a freeze ‘turn off’ at 50 degrees without losing Crop Evapotranspiration accumulations. To do this I’ve guessed that the best way is to manage opening and closing Iro2’s sensor port. And to do this I’ll using my automation system to monitor outside temperature and open/close a relay connected to the Iro2’s sensor port. .
My second objective is to see what kind of watering pattern I get here for a Dallas climate. Trees and shrubs and grass don’t need much water. I’m curious if I’m going to get blasted with a lot of water during the days when temps are above 50 degrees (since Current Moisture Balances may be below Allowed Depletion).
Right now no zones are scheduled to water for a few days because it’s raining outside today.
I put ‘freeze sensor’ in quotes because my actual implementation at first is simply a piece of wire to simulate the freeze sensor. I’m assuming most freeze sensors that many cities require per ordinance are simply Normally Closed switches that open up at 32 degrees.
I connected my ‘freeze sensor’ to the S1 and SC terminals. I expected to see Iro2 activity afterwards, but nothing happened. Then I realized I needed to configure the Iro2 to tell it a ‘freeze sensor’ is connected.
My Iro2 shows to be ‘on line.’
Using the latest version of Chrome on a PC, I connected to app.rach.io and updated device settings such that ‘Rain Sensor’ is ‘on.’ I also went to user preferences and made sure everything was checked ‘on’ for emails and text messages.
Still nothing happened. Then I realized that freeze sensors are Normally Closed, and thus to simulate a ‘freeze situation’ I’ve got to open up the connection between S1 and SC.
I opened up the connection but nothing happened. Since I don’t know how Flex Daily is implemented, I decided to wait a day to see how scheduling proceeds today near my 10:15 daily schedule start.
Unfortunately (for the experiment) today I see at 8:15 AM in the Device Updates section: “Device status power cycle.” Indeed, upon checking, I did lose power for a minute (as reported by automation system and by NAS unit connected to a UPS).
Thus, the most recent entry: “Rain sensor activated” (also at 8:15 AM) is something that makes me wonder if I needed to have recycled power to the Iro2 after connecting the ‘freeze sensor’ last night. Or perhaps it wasn’t needed and today’s “Rain sensor activated” is simply a message will occur everytime there’s a power failure. I’ll figure this out eventually.
No other information at the moment. Nothing appeared in Schedule Updates this morning. This makes sense as it’s raining currently. No email or text messages either…
I’ll continue to update this posting as I learn more about how to install a freeze sensor set at 50 degrees when using a Flex Daily schedule.