A master device controls the communication with the slaves. It interrogates the slaves for whether they want to transmit or can receive. Only master devices can initiate a communication. Polling is a form of synchronising a number of devices.
Engineering Design Show (Coventry, GB) 19.10.2016 - 20.10.2016
Advanced Engineering Show (Birmingham, GB) 02.11.2016 - 03.11.2016