A tiny development board to quickly prototype RS485/Modbus devices

When building RS485/Modbus networks I have identified a need for a platform that would allow me to put various additional sensors or actuators on the network. Like relays to switch stuff, temperature, humidity sensors or other devices that don't have a native Modbus interface.

This board allows interfacing to different digital busses or analog devices.

• Robust RS485 interface
• ESD protection
• Extendable Modbus slave firmware
• I2C interface
• SPI interface
• 2 analog inputs
• PWM outputs
• 2x5 0.1' prototyping area
• Small form factor allowing PCB integration or inline integration into cable assembly