usb-rly8B unit is 8 relays controlled by USB.
http://www.robot-electronics.co.uk/htm/usb_rly08btech.htm
Commands
The USB-RLY08 operates with an easy to use command set as described in the table
below. Most commands are only a single byte and if applicable the USB-RLY08 will automatically send its response.
| Command |
Action |
| dec |
hex |
| 90 |
5A |
Get software version - returns 2 bytes, the
first being the Module ID which is 8, followed by the software
version |
| 91 |
5B |
Get relay states - sends a
single byte back to the controller, bit high meaning the corresponding relay is
powered
|
| 92 |
5C |
Set relay states -
the next single byte will set all relays states, All on = 255 (11111111)
All off = 0 |
| 100 |
64 |
All relays on |
| 101 |
65 |
Turn relay 1 on |
| 102 |
66 |
Turn relay 2 on |
| 103 |
67 |
Turn relay 3 on |
| 104 |
68 |
Turn relay 4 on |
| 105 |
69 |
Turn relay 5 on |
| 106 |
6A |
Turn relay 6 on |
| 107 |
6B |
Turn relay 7 on |
| 108 |
6C |
Turn relay 8 on |
| 110 |
6E |
All relays
off |
| 111 |
6F |
Turn relay 1 off |
| 112 |
70 |
Turn relay 2 off |
| 113 |
71 |
Turn relay 3 off |
| 114 |
72 |
Turn relay 4 off |
| 115 |
73 |
Turn relay 5 off |
| 116 |
74 |
Turn relay 6 off |
| 117 |
75 |
Turn relay 7 off |
| 118 |
76 |
Turn relay 8 off |
