Overall System Desing:

-Nodes: ESP8266

Sensors: Water PH, Water Temperature, Water Salinity, Water Conductivity, Environmental Humidity, Temperature, pressure, PAR sensor, 3/4 water Flow sensor.

-Communications: Wifi

-Message Format: JSON

Protocol: MQTT

-Backend

Python

Pub/Sub: Mosquitto

DB: Mongo

-Front end:

python, Flask, nginx,

dashboards: Freeboard.io