Hi guys, after many tests and small improvements I can say, that Growduino V3 is ready for production. just sent me PM
Recent updates:
UPS controlled shutdown
We should have had this a long time ago, it just didn’t work out. As soon as the battery drops below 6%, the machine switches off in a controlled manner. There is no risk of data loss or system crash and the need to reinstall. And it’s made a little smarter - energy has to be below 6%, MainPower has to be turned off, both have to be at least 3 minutes in a row. This eliminates premature or more frequent shutdowns with different types of crashes / throws.
EC Fan
We can control any EC fan with 0-10V standard. The user can set either ON (permanently on), OFF (permanently off), AUTO (classic on / off in Day / Night mode depending on temperature + humidity + CO2 + regular ventilation) or EC. In EC mode, you can also set the times for Day / Night mode as you wish, but you can also set the percentage of power depending on temperature, humidity and CO2. The control logic correctly recognizes which performance needs to be set, which value has exceeded the limit. Of course, there is minimal speed, where you can also set 0-100%.
Because different fan manufacturers have different connectors, we make a custom “converter” for it. The entire EC ventilation system, including the converter, costs + 500, -, which is much cheaper than any EC Fan controller.
In addition, you can see the% of fan power in the graph, so you can compare in history what the values were on the sensors and how many% at that moment the fan was running, and thus you have the opportunity to fine-tune the settings.
We will improve it even more, the user settings will be like that of MSI in its Afterburner, I’m really looking forward to it:
pH
We now use a faster and more accurate pH calibration equation depending on the range of the AD converter in the sensor. The sensor is in-house made because the only reasonably functional one was AtlasScientific in our tests, but it is very expensive. In addition, it was not galvanically isolated, which causes interference with other immersion sensors. Now we have the same good, with galvanic separation and much cheaper (59,-€)
EC
Same as pH, including price.
CO2
The same as at pH, the price is (89,-€). The range has been reduced from the original analog 400-40000PPM to 400-5000PPM, which, among other things, allows for more precise control of ventilation and dosing, because we still do not want to exceed 2000PPM for plants. Day / Night mode is a matter of course.