Communication system

A communication system comprising:

• a first sensor apparatus transmitting a first sensor signal including detection information of a detection target as a digital signal;
• a second sensor apparatus transmitting a second sensor signal including different detection information of a different detection target as a different digital signal;
• and
• a microcomputer receiving the first sensor signal transmitted from the first sensor apparatus and the second sensor signal transmitted from the second sensor apparatus through a signal line, and the microcomputer performing a control operation at a predetermined operation cycle based on the first sensor signal and the second sensor signal,
• wherein
• each of the first sensor signal and the second sensor signal includes a series of signals including a first synchronization signal and a data signal following the first synchronization signal,
• the microcomputer transmits, to the first sensor apparatus and the second sensor apparatus, a second synchronization signal which is synchronized with the predetermined operation cycle of the microcomputer,
• each of the first sensor apparatus and the second sensor apparatus transmits a corresponding sensor signal, which is one of the first sensor signal and the second sensor signal, at a predetermined constant cycle except when the second synchronization signal transmitted from the microcomputer is received, and
• each of the first sensor apparatus and the second sensor apparatus changes a transmission timing of the corresponding sensor signal, which is one of the first sensor signal and the second sensor signal, based on the second synchronization signal when the second synchronization signal transmitted from the microcomputer is received.