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Fig. 7 | EURASIP Journal on Embedded Systems

Fig. 7

From: Optimizing linear routing in the ToLHnet protocol to improve performance over long RS-485 buses

Fig. 7

Ping sequence on a chain of repeaters. The differential RS-485 signal as received by Board4 during the arrival of a ping request and the following reply. In order of arrival, the bursts are the packet sent from Board1, then repeated by Board2, and finally repeated by Board3. The strongest signal is the reply transmitted by Board4 itself, followed by the reversed chain of repeats by Board3 and Board2. Board1 finally forwards the packet to the master PC over the USB link. The total round trip time for the process, as seen by the master, is 1.4 ms

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