The v1.5 Farmduino board features an Arduino MEGA 2560 microcontroller that interfaces with the Raspberry Pi and stepper drivers, and controls the UTM and peripherals. The board also features an STM32 co-processor to process the encoder signals at high speed. The board has a layout and connectors that are optimized for FarmBot's various peripherals and motor requirements. It comes with five integrated Trinamic TMC2130 stepper drivers, a replaceable blade fuse, and current-sensing peripheral circuitry.
The v1.5 Farmduino board can be a drop-in upgrade to a v1.4 board. However, because it runs on 24V, it is not a drop-in upgrade for v1.2 or v1.3 kits.