automatically water plants based upon moisture sensor feedback
see wiring and firmware details below.
- $6.00 rp2040 pico - (pico w optional)
- $3.70 relays 5 volt spst
- $10.76 5 volt pump -alternate pump $3.25 low cost
- wiring
-
firmware inputs
- [soilUL] [soilLL] - upper and lower moisture sensor limits
- [ctlmode] - fully AUTO closed loop = -1; TIMER open loop = 1 [default]; OFF = 0
- [doseSP] - target dispense dosage per pump trigger
- [waterIntSP] - open loop trigger period for dispense check
-
tuning
- Set [ctlmode] = 0 this will turn off hydration
- Monitor the current min and max measurents obtained by the sensors
- Update [soilUL] [soilLL] limits outside of the measurement variation
-
TIMER [ctlmode] = 1
-
AUTO [ctlmode] = -1
-
OFF [ctlmode] = 0
- see scan examples above.