Quantity   Component name
1 × LoLin D1 mini
1 × Optional OLED 1"33 I2C display
1 × Optional HM-10 BLE module Needed if you intend to control fermentation using a Tilt hydrometer
2 × BJT Transistors to drive relay output
4 × Resistors to support BJTs
3 × LED different colors
3 × Resistors to support LEDs
1 × DS18B20 temperature sensor Up to three
2 × Single relay module To drive heating and cooling actuators
1 × DS1307 RTC I2C module optional real time clock module