After installing one relay board in respberry pi I tested with success some commands to open and close the relays but I found one problem. I do not receive the status of the eight relays or the status of single relay. How can I fix this?
The permission that I added in ttyUSB0 #chmod o+rwx /dev/ttyUSB0
#!/bin/bash stty -F /dev/ttyUSB0 9600 # Command to get the status of eight relays. echo -e '\xff\x09\x00' > /dev/ttyUSB0 while true; do cat /dev/ttyUSB0 done exit
Note: in C code the output works fine. http://www.kmtronic.com/software/Raspberry_PI/Raspberry_PI_KMTronic_USB_Relay.zip
If you are trying to get the status you should be sending: echo -e '\xff\x01\x03' > /dev/ttyUSB0