Today the project starts in earnest. I was contacted last night by my brother with a rather disturbing picture of dead plants.

Due to the unattended operation some failure occurred and with no monitoring of the system the grow bed was devoid of water for a period of time.

While contemplating the requirements of the project all manner of ideas have come up and what we could control and needless to say feature creep was starting to set in so a decision has been made to lock down the parameters just as indicated in the description above and save the added features for a future project and upgrade once we had the opportunity to try the system out. Implementing great ideas that may be not necessary will only delay the project further which will lead to greater crop loss.

The project in its current form will be limited to 3 inputs and 3 outputs

Inputs

Node MCU Pin	Description	Type
A0	Grow media Moisture	Analog
D1	Water Storage Level	Digital
D2	Temperature and Humidity	One wire Bus

Outputs

Node MCU Pin	Description	Type
D5	Water Pump	Digital
D6	Exhaust Fan	Digital
D7	Mister	Digital
D8	Moisture Sense Activate	Digital

Specs for the NODE MCU 1.0 Board available from

https://github.com/nodemcu/nodemcu-devkit-v1.0

Pinouts