hide empty location

node.lua

@@ -3,7 +3,7 @@ util.init_hosted()
 local json = require "json"
 
 local serial = sys.get_env "SERIAL"
-local location = "<please wait>"
+local location = ""
 local description = "<please wait>"
 
 util.data_mapper{
@@ -28,7 +28,12 @@ function node.render()
     -- lower: 707
 
     upper_text = "C3VOC: " .. description
+
+    if location == nil or location == '' then
+        lower_text = "Serial " .. serial
+    else
         lower_text = location .. " - Serial " .. serial
+    end
 
     upper_width = font:width(upper_text, 40)
     font:write(960-(upper_width/2), 631, upper_text, 40, 1,1,1,1)