Readme of UPSMON FOR LINUX

upsmon  PM1   PM2  PM3 
1.upsmon has 3 parameters, PM1, PM2 and PM3 
2.PM1: COMPORT => ttyS0 (COM1) or ttyS1 (COM2)  
You must include the path when you set the parameter PM1 (Ex: /dev/ttyS0)
Please note that PM1 *MUST* be set.
3.PM2: Sets the breakout delay time. default: 60 sec.
4.PM3: Sets the UPS shutdown delay time. default: 60 sec.

./upsmon /dev/ttyS0 300 60

Installation steps must use root LOGIN:

5.Copy upsmon.tar to /etc directory.
6.use tar xvf upsmon.tar  to install software.
7.It will be created a upsmon directory.
8.Change to upsmon directory.
9.Test UPSMON and comport:  
Use commend ./upsmon /dev/ttyS0 300 60  ( ./upsmon must be included when you use this commend)
Means: ./upsmon COM1 300 seconds AC fail count and 60 seconds UPS shutdown delay. 
You will see UPS CONNECT OR NO CONNECT UPS in tty1 (ctrl_alt_F1)
If it didnt connect UPS, you can use the commend kill PID to delete the process of UPSMON
Then, use commend ./upsmon /dev/ttyS1 300 60 (./upsmon must be included when you use this commend)
Means: ./upsmon COM2 300 seconds AC fail count and 60 seconds UPS shutdown delay. 
If it still doesnt connect, please check the CABLE
 PC and UPS are all be connected correctly.

10.After the connection confirmed, please edit the system setup file rc.local under /etc/rc.d/rc.local and add the following commend to edit rc.local:

  /etc/upsmon/upsmon /dev/ttyS0 300 60
  or
  /etc/upsmon/upsmon /dev/ttyS1 300 60
  The system will execute upsmon after restart the computer.
11.You can see the situation of UPS if you use the commend ./upsdisp under directory /etc/upsmon (./upsmon must be included when you use this commend)
12.Use CTRL-C, you can exit UPSDISP. 
13.The UPS Event Log file save to: /etc/upsmon/PCMYYMM.log.
(PS.The YY is year and the MM is month.)