Hi All
I'm trying interface a SRF485 ranging sensor (SRF485WPR Ultra sonic range finder) to the Duemilanove using the RS485 protocol. Is there maybe someone who already did something like this? The control data frame is given on the website, but I'm not sure how to do the serial communication. Does the Duemilanove also use 1 start bit, 2 stop bits and no parity?
Also, in the first part of the data frame, the TX should be low for 600uS and high for 52uS. The Duemilanove doesn't allow you to control the TX pin with digital.write (only serial.write) , so how do I make the pin high and low for a given time?
Any help would be appreciated!