The STG-800 range of mini PLCs from manufacturer Barth Elektronik is now programmable via the Arduino software, a free software patch for the latest Arduino IDE (Integrated Development Environment) is available to support all models in the STG-800 range. The three "STG-800" mini PLCs are based on a 32-bit ARM Cortex processor. In addition to the Arduino IDE, the PLCs can be programmed using the "miCon-L" software. Open source C programming with the "Keil μVision" software suite is also possible. All PLCs offer ten I/O and one CAN interface, which enable communication with external devices. The mini PLC has five digital inputs. Three of these can be configured as 0 to 30 V(DC) analog inputs with a 12-bit ADC, one serves as a 25 kHz input event counter and the last as a 40 µs input pulse and frequency counter. Five solid-state power outputs (up to 1.5 A) can also support a 16-bit PWM output with 1 Hz to 25 kHz.