AN15 One switch to turn off 20 power outputs (monitors) over LAN

After that, Status changes to Connected and a green dot appears next to the Serial Console tab.

After saving the changes, the device restarts itself. After the restart, a green dot should appear next to the URL API tab, indicating that the protocol is active.

Script 1 – Send message over serial port

Runs continuously and sends data to the serial port. That is all it does.

1) Fill in the following parameters:

• Enabled: checked
• Name:             Send message (Tx) (user-defined)
• Description: Send message over Serial Port (user-defined)
• Trigger: System started up
• Schedule: Always

2) Copy the following code and paste it into the field for the Lua script:

local period = 500

local function sendUart()
  devices.system.SerialWrite{id="uart",message="\r\n"}
  milliDelay(period,function() sendUart() end)
end

sendUart()

Script 2 – Receive message and save timestamp

Runs continuously and evaluates data received over the serial port (detects the “on” or “off” state of the central switch). 

1) Fill in the following parameters:

• Enabled: checked
• Name: Receive message (Rx) (user-defined)
• Description: Receive message over Serial Port (user-defined)
• Trigger: Serial packet received
• Schedule: Always

2) Copy the following code and paste it into the field for the Lua script:

 local stringTime = os.date("%X")
_G.timeStamp = (3600*tonumber(stringTime:sub(1,2)) + 60*tonumber(stringTime:sub(4,5)) + tonumber(stringTime:sub(7,8)))

Script 3 – Send URL commands

1) Fill in the following parameters:

• Enabled: checked
• Name: Send command (user-defined)
• Description: Send command to all NETIOs devices (user-defined)
• Trigger: System started up
• Schedule: Always

2) Copy the following code and paste it into the field for the Lua script:

------------AN15 Script 3 - Send URL commands / Section 1------------
-- IP, passphrase, ActionON, ActionOFF
local IPs = {
"192.168.101.172", "netio-psw", "1511", "0500",
"192.168.101.155", "netio12345", "1151", "0050",
"192.168.101.131", "24A42C390D7C", "1115", "0005",
"192.168.101.28", "helloWorld123", "0011", "1100",
"192.168.101.220", "noIdea42", "1111", "0000"
}
---------End of Section 1---------

_G.timeStamp = 0
local stringTime = os.date("%X")
local currentTime = (3600*tonumber(stringTime:sub(1,2)) + 60*tonumber(stringTime:sub(4,5)) + tonumber(stringTime:sub(7,8)))


function checkRespond()
  stringTime = os.date("%X")
  currentTime = (3600*tonumber(stringTime:sub(1,2)) + 60*tonumber(stringTime:sub(4,5)) + tonumber(stringTime:sub(7,8)))
  if (currentTime - _G.timeStamp) <= 1 then
    for i=1,#IPs,4 do
      local actionON = IPs[i+2]
      local urlCommandON = "http://".. IPs[i] .."/netio.cgi?pass=" .. IPs[i+1] .. "&output1=" .. actionON:sub(1,1) .. "&output2=" .. actionON:sub(2,2) .. "&output3=" .. actionON:sub(3,3) .. "&output4=" .. actionON:sub(4,4)
      devices.system.CustomCGI{url=urlCommandON}
    end
  else
    for i=1,#IPs,4 do
      local actionOFF = IPs[i+3]
      local urlCommandOFF = "http://".. IPs[i] .."/netio.cgi?pass=" .. IPs[i+1] .. "&output1=" .. actionOFF:sub(1,1) .. "&output2=" .. actionOFF:sub(2,2) .. "&output3=" .. actionOFF:sub(3,3) .. "&output4=" .. actionOFF:sub(4,4)
      devices.system.CustomCGI{url=urlCommandOFF}
    end
  end
  delay(1,function() checkRespond() end)
end  

checkRespond()

Setting the variables

• Section 1 of the third script (Send command) contains the IPs variable. This variable specifies the IP addresses of NETIO devices to control with the central switch, including the desired states of their outputs
• IPs
  • The variable contains an array of strings. Therefore, individual elements need to be in double quotes and separated with commas (there is no comma after the last string).
  • For each IP address, 4 parameters are needed: IP address, passphrase for its URL API, output states when the switch is on (ActionON), and output states when it is off (ActionOFF).
  • These parameters are in double quotes and separated with commas.
  • IP adresa
    • IP address of the NETIO device to control
  • Passphrase
    • Password for the URL API of the device (see Configuring the URL API at the controlled NETIO devices)
  • ActionON
    • Desired states for the controlled NETIO device outputs when the switch is in the “on” position.
    • The string consists of 4 numbers (one for each output).
    • 0 - output switched off
    • 1 - output switched on
    • 5 - output state unchanged
  • ActionOFF
    • Desired states for the controlled NETIO device outputs when the switch is in the “off” position.
    • The string consists of 4 numbers (one for each output).
    • 0 - output switched off
    • 1 - output switched on
    • 5 - output state unchanged

• Example of controlling two NETIO devices:
• The first IP address (192.168.1.1) has the passphrase netio-psw1. When the switch is on, all its outputs should be switched on, too. When the switch is off, all outputs should be switched off as well.
• The second IP address (192.168.1.2) has the passphrase netio-psw2. When the switch is on, outputs 1 and 2 should be switched off and outputs 3 and 4 should remain unchanged. When the switch is off, outputs 1 and 2 should be switched on and outputs 3 and 4 should be again unchanged.

-- IP, password, Action ON, Action OFF)

local IPs = {

"192.168.1.1", "netio-psw1", "1111", "0000",

"192.168.1.2", "netio-psw2", "0055", "1155"

}

Starting the script

• After saving all scripts and activating the serial line, simply restart your NETIO device and all scripts start to run.

FAQ:

1) The outputs are set repeatedly every second. How can I change this period?

Near the end of the third script (Send URL commands), find the following line:

delay(1,function() checkRespond() end)

This Application Note is compatible with:

NETIO PowerPDU 4C NETIO PowerPDU 4C is a small 110/230V PDU (Power Distribution Unit). Each of the four IEC-320 C13 outlets can be independently controlled (On / Off / Reset / Toggle). Electrical parameters (A, W, kWh, TPF, V, Hz) are measured with high accuracy at each outlet. The device features two LAN ports (and a built-in Ethernet switch) for connecting to a LAN. Each power output supports ZCS (Zero Current Switching) to protect the connected equipment. More about NETIO PowerPDU 4C