I am attempting to create an automated aeroponic garden. I have zero knowledge about Arduino, beyond the basics of want it is. If I ask a question and details are missing either I don't have that info or didn't realize it mattered. When possible work around it or assume a value you understand to be a reasonable guess. For right now I am assuming a 12V system.
If a question has multiple right answers please opt for simplicity or safety.
The garden will be WiFi connected and have:
1 Touch Screen
1 Water Reservoir
1 Nutrient Res.
1 Return Res.
Each will have 1 eTape (24") Fluid Level Sensor, the Return and the Nutrient Reservoirs will ea. have a temp probe.
1 Temp/ Humidity Sensor
1 CO2 Sensor
1 Fan (NOT 12V but on/off will be controlled by a 12V switch - this will be addressed last)
1 CO2 Regulator
1 Set of Grow Light (NOT 12V but on/off will be controlled by a 12V switch - this will be addressed last)
1 Mixing Valve
3 Water Pumps
17 Solenoid Valves
There will be 10 grow tubes each w/ 1 ea.; eTape (24") Fluid Level Sensor, Utrasonic Fogger, a temp probe, and a fan.
The nutrient solution distribution will be controlled by the Mixing Valve, Water Pumps, and Solenoid Valves.
My 1st question assumes all of these components cannot be connected directly to a single Arduino (R3), so different shields and/ or boards will be required. My understanding is using relay arrays is the best way to connect multiples of the same part (i.e. Solenoid Valves)
QUESTION 1a: How do I wire an R3 using an 8 Channel DC Relay Module (i.e. JBtek 8 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM or SainSmart 8-Channel Relay Module) and a bread board - w/ 400 tie-Points, 4 Power Rails?
1b Would a 16 Channel Module be wired differently?
1c Can an R3 handle this many components?
If not can 2 or 3 R3s be connected to work together? (How does not matter right now.)