z:createTrigger(1, "Type sub-space message")
z:setTriggerReply(1, "hi") -- replies work whether or not the trigger is enabled
--z:enableTrigger(1)

z:createTrigger(2, "Sub-space comm-link terminated")
z:enableTrigger(2)

z:createTrigger(3, "(?=Help)? : Q")
z:enableTrigger(3)

repeat
   ans = z:waitForAnyTrigger(500) -- 500 ms timeout
   if ans == 1 then z:write("!yay") -- should never hit this because trigger 1 is not enabled
      elseif ans == 2 then z:send("/")
      elseif ans == 3 then break
--      elseif ans == 0 then z:write("!!!timeout")
--      elseif ans == -1 then z:write("!!!abort")
      elseif ans == -2 then z:write("!!!badindex")
      elseif ans == -3 then z:write("!!!nop")
      elseif ans == -4 then z:write("!!!fail")
--      else z:write("!!!wtf")
   end
until ans < 0

z:deleteTrigger(1)
z:deleteTrigger(2)
z:deleteTrigger(3)

timeout = 5000

z:createTrigger( 1, "S:" )
z:enableTrigger( 1 )
z:send( "'\r" )
z:waitForTrigger( 1, timeout )
z:deleteTrigger( 1 )

z:createTrigger( 2, "S: ping" )
z:enableTrigger( 2 )

count = 4
c = 0
min = timeout
max = 0

t0 = z.tick

z:send( "ping" )
t1 = t0

repeat
   ans = z:waitForTrigger( 2, timeout )
   c = c + 1
   t2 = z.tick
   delta = t2 - t1
   min = math.min( min, delta )
   max = math.max( max, delta )
   t1 = t2
   z:send( string.format( " : %d ms\rping", delta ) )
until ans < 1 or c >= count

z:disableTrigger( 2 )
z:send( string.format( " : count=%d : min=%d : avg=%d : max=%d\r\r",
   c, min, ( t2 - t0 ) / c, max ) )

z:deleteTrigger( 2 )