I running command "SystemInfo" , the response is :

................e...{"EncryptType": "MD5", "LoginType": "DVRIP-FutureHome", "PassWord": "WpkqaSUm", "UserName": "admin"}
....2...............{ "AliveInterval" : 30, "ChannelNum" : 1, "DeviceType " : "IPC", "ExtraChannel" : 0, "Ret" : 100, "SessionID" : "0x00000032" }
.................2...{"Name": "SystemInfo", "SessionID": "0x00000032"}
................Y...{ "Name" : "SystemInfo", "Ret" : 607, "SessionID" : "0x00000000", "SystemInfo" : null }

But expected response is :

......... .......8...{
"Name": "SystemInfo",
"SessionID": "0x0000000001"
}.........(.....P.<........... .......x...{ "Name" : "SystemInfo", "Ret" : 100, "SessionID" : "0x00000001", "SystemInfo" : { "AlarmInChannel" : 0, "AlarmOutChannel" : 0, "AudioInChannel" : 1, "BuildTime" : "2019-07-25 19:04:44", "CombineSwitch" : 0, "DeviceModel" : "RA50X20", "DeviceRunTime" : "0x000099f2", "DigChannel" : 0, "EncryptVersion" : "Unknown", "ExtraChannel" : 0, "HardWare" : "XM530_RA50X20_8M", "HardWareVersion" : "1.01", "SerialNo" : "e976aa836ddfa704", "SoftWareVersion" : "V5.00.R02.00030665.10010.243506.0000000", "TalkInChannel" : 1, "TalkOutChannel" : 1, "UpdataTime" : "", "UpdataType" : "0x00000000", "VideoInChannel" : 1, "VideoOutChannel" : 1 } }