I'm looking for some greenhouse automation.
Initially, I need to cycle exhaust fan to control humidity (if humidity is high, exhaust fan on for 2 minutes, wait 30 minutes, check again).
This means reading a humidistat and driving 240V relay.
I was thinking about doing it with ICs (I haven't done anything with electronics in about 20 years), but then I figured I'd want to expand the system to controlling watering, recording temp and humidity, etc.
The system would ultimately drive relays based on time and sensor data, and report activity / sensor data:
Activity would be exhaust, heater, and 10+ water valves.
Sensor data would be humidity, temp, sunlight and 10+ moisture sensors.
So I was thinking the best way would be a microcontroller - I ordered an Arduino.
I know it doesn't have the capacity for 10+ water valves and sensors, but I figured it'd get me started with temp, humidity, exhaust, heat and 1-2 valves and moisture sensors.
As far as reporting - I figured I could have it post to a web server over ethernet.
I was considering just using a PC in the greenhouse to control everything, but I am hoping a microcontroller will be:
a lot less likely to crash
much more resistant to heat/humidity (I was hoping it could be sealed and not need active cooling)
maybe cheaper
Thoughts and recommendations?
Thanks
Initially, I need to cycle exhaust fan to control humidity (if humidity is high, exhaust fan on for 2 minutes, wait 30 minutes, check again).
This means reading a humidistat and driving 240V relay.
I was thinking about doing it with ICs (I haven't done anything with electronics in about 20 years), but then I figured I'd want to expand the system to controlling watering, recording temp and humidity, etc.
The system would ultimately drive relays based on time and sensor data, and report activity / sensor data:
Activity would be exhaust, heater, and 10+ water valves.
Sensor data would be humidity, temp, sunlight and 10+ moisture sensors.
So I was thinking the best way would be a microcontroller - I ordered an Arduino.
I know it doesn't have the capacity for 10+ water valves and sensors, but I figured it'd get me started with temp, humidity, exhaust, heat and 1-2 valves and moisture sensors.
As far as reporting - I figured I could have it post to a web server over ethernet.
I was considering just using a PC in the greenhouse to control everything, but I am hoping a microcontroller will be:
a lot less likely to crash
much more resistant to heat/humidity (I was hoping it could be sealed and not need active cooling)
maybe cheaper
Thoughts and recommendations?
Thanks