Feature:

All current features of Reef Pi 3.2 are compatible, including:

Equipment Control - 8 dedicated GPIO channels for equipment output control (via 5V relay cards)

Lighting Cycles - 4 independent light control channels for controlling spectrum and intensity on LED lighting (IRLB8721PBF - 30V 62A)

pH Monitoring Input - Input for pH Interface via I2C Line (EZO? pH PCB is required) https://atlas-scientific.com/embedded-solutions/ezo-ph-circuit/

Control dosing pump - 4 variable 12V outputs. Can be used to control 4 12V peristaltic dosing pumps. (L293D)

Temperature monitoring on board by DS18B20 and one or more externally connected DS18B20.

Auto top-off & water level monitoring - 2 channels of mechanical float switch input & 2 channels of optical water level sensor input

A selected 5V/3.3V pwm output.

Ttwo N-mos outputs.

four inputs to Rpi via GPIO

four 5V pwm LED outputs for signalling

3 independent power inputs: 12V, 10V and 5V. These will route power wherever it's needed, including to the Raspberry Pi

an additional Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface - PCA9685 is required