In order to start working with the adapter, you must block it. This is to prevent another user from interfering with your program. When blocking another adapter, the previously blocked adapter is unlocked. You can also unlock the current adapter by setting an empty serial number.
{
"cmd" : "dev.srv.lock",
"sn": "DD1"
}
{
"res": 0
}
{
"res": -448
}