Prestel FM-42H2A User Manual page 21

The ASCII list about the product is shown as below.
Serial port protocal:
TCP/IP protocol port: 8000. The x, y, z, XXX are parameter.
RS-232 Command
System Setting
r status!
r fw version!
r link in x!
r link out y!
s reset!
s power z!
r power!
s reboot!
Output Setting
s in x av out y!
r av out y!
s hdmi y stream z !
r hdmi y stream!
s hdmi y scaler z!
r hdmi y scaler !
s hdmi y hdcp z!
ASCII Command
Baud rate：115200 (default), Data bits: 8bit, Stop bits:1, Check bit: 0
Function description
Get device current status
Get Firmware version
Get the connection status of the x input port，
x=0~4(0=all)
Get the connection status of the y output port,
y=0~2(0=all)
Reset to factory defaults
power on/off the device,z=0~1(z=0 power off,
z=1 power on)
get current power state
reboot the device
Set input x to output y，x=1~4，y=0~2(0=all)
Get output y signal status y=0~2(0=all)
Set hdmi output y stream on/off, y=0~2(0=all)
z=0~1(0:disable,1:enable)
Get hdmi output y stream status, y=0~2(0=all)
Set hdmi output y port output mode, y=0~2(0=all),
z=1~4(1=off,2=4k->1080p,3=hdbt mode, 4=Auto)
Get hdmi output y port output mode y=0~2(0=all)
set hdmi output y port hdcp status y=0~2(0=all)
z=0~1(1=on,0=off)
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Feedback
Get the unit all status:
power, in/out connection,
video/audio crosspoint, edid,
scaler,hdcp, network status
MCU BOOT: V1.00.01
MCU APP : V1.10.05
HDMI IN1: connect
HDMI OUT1: connect
Reset to factory defaults
System Initializing...
Initialization Finished!
Power on
System Initializing...
Initialization Finished!
power off
power on /power off
Reboot...
System Initializing...
Initialization Finished!
input 1 -> output 2
input 1 -> output 1
input 2 -> output 2
Enable HDMI out1 stream
Disable HDMI out1 stream
Enable HDMI out1 stream
hdmi output 1 set to bypass
mode
hdmi output 1 set to bypass
mode
hdmi out 1 hdcp on