I connected a lot of USB-RS485 adapters to my smart meter readout software and wasn't happy. Either the device is cheap and broken or works but is very expensive. The supercheap adaptors from China ...

4 2 [1 - 65535] 0 Time to sleep in seconds. Write to this register to put the sensor to sleep. Note: most of the cheap ebay USB to RS485 dongles and/or their drivers do not support parity setting ...