View difference between Paste ID: Yv5VESh1 and XbVETyjd

 threshold = 0.8
 notifThreshold = 0.25
 mon = peripheral.find("monitor")
 modem = peripheral.find("modem")
 notifSentFlag = false
 
 cells = table.pack(peripheral.find("thermal:energy_cell"))
 
 function notifSend (text)
   modem.transmit(1337,1,text)
 end
 
 function writeMonStatus (state,pct)
   mon.clear()
   if mon.setTextScale ~= nil then
     mon.setTextScale(1)
     local width, height = mon.getSize()
     if width < 15 or height < 5 then -- Small monitor - scale down
       mon.setTextScale(0.5)
     else -- Large monitor - scale up
       local scale = math.min(width / 14, height / 2, 5)
       scale = math.floor(scale * 2) / 2 -- multiple of 0.5
       mon.setTextScale(scale)
     end
   end
   mon.setCursorPos(1,1)
   mon.write("State: " .. (state and "On" or "Off"))
   mon.setCursorPos(1,2)
   mon.write("Energy: " .. pct .. "%")
 end
 
 function main ()
   local energyCur = 0
   local energyMax = 0
 
   for _,cell in ipairs(cells) do -- ipairs avoids returning count (key "n")
     energyCur = energyCur + cell.getEnergy()
     energyMax = energyMax + cell.getEnergyCapacity()
   end
 
   local energyFraction = energyCur/energyMax
   print(energyFraction)
   local energyPercent = string.format("%.2f",
     math.floor(energyFraction*10000)/100)
 
   if energyFraction < notifThreshold then
     if not notifSentFlag then
       notifSentFlag = true
       notifSend("Warning: Base power capacity at "
       ..energyPercent.."%")
     end
   else
     notifSentFlag = false
   end
 
   local state = energyFraction < threshold
   redstone.setOutput("top",state)
   writeMonStatus(state,energyPercent)
 end
 
 while true do
   status,err = pcall(main)
   if not status then print(err) end
   sleep(5)
 end