+XSIO: Variant=0: AT=UART0,UART2; Trace=NULL;  (No Power-Concept on UART0) 
+XSIO: Variant=7: AT=UART2; Trace=UART1; H5=UART2 (H5 enabled via AT command on UART2) 
+XSIO: Variant=6: AT=UART0, UART2; Trace=NULL; H5=UART2 (H5 enabled via AT command on UART2) 
+XSIO: Variant=5: AT=UART2; Trace=UART1; H5=UART2 (H5 enabled on startup) 
+XSIO: Variant=4: AT=UART0, UART2; Trace=NULL; H5=UART2 (H5 enabled on startup) 
+XSIO: Variant=3: AT=UART0; Trace=UART1; 
+XSIO: Variant=1: AT=UART2; Trace=UART1; 
+XSIO: Variant=2: AT=UART2; Trace=UART0; H5=UART2 (H5 enabled via AT command on UART2)
Syntax: <int: counter> <int: length[1-1500]> <hex-sequence>[0-9a-fA-F]
Examples:
   1 200<cr>
     Send 1 packet with 200 0x2B (fill character).
   5 1000<cr>
     Send 5 packets with 1000 0x2B (fill character).
   1 5   31 32 33 34 35<cr>
     Send 1 packet with the given contents.
   1 10  31<q><cr>
     Send 1 packet with 10 0x31.
   +++<cr>
     Leave the test session.
   cid=2
     Send packets about cid 2.
SC - Secondary Conext
Syntax: "sc=" <int: cid> <int: number> <int: length[1-1500]> ";" ...
Example:
   sc=1 5 500; sc=2 10 1000
     Send packets about cid 1 and 2 in parallel.
Either a packet is sent
a) if the length field is terminated with <cr>
c) or the length value is equal # chars of hex-sequence
b) or the input is terminated with a character unequal hex digit and <cr>.
Leave the layer 2 hex packet protocol mode by typing of +++.