Which protocol is the best? People may wonder, why use SDI12 when there are other protocols with far wider adaption than SDI12?  Two commonly encountered ones are  Modbus (in its many varieties such as Modbus-ASCII, Modbus-RTU, Modbus-TCP) and NMEA-0183  There are others like Profibus, HART and Fieldbus (widely used in process control applications), CANBus (automotive), DNP3 (for […]