check if interface exists before trying to get its device or type

2022-04-22 10:21:15 -04:00
parent 991c855c11
commit f7c11febe5
3 changed files with 8 additions and 4 deletions
--- a/scada-common/ppm.lua
+++ b/scada-common/ppm.lua
@@ -174,12 +174,16 @@ end

 -- get a mounted peripheral by side/interface
 function get_periph(iface)
-    return self.mounts[iface].dev
+    if self.mounts[iface] then
+        return self.mounts[iface].dev
+    else return nil end
 end

 -- get a mounted peripheral type by side/interface
 function get_type(iface)
-    return self.mounts[iface].type
+    if self.mounts[iface] then
+        return self.mounts[iface].type
+    else return nil end
 end

 -- get all mounted peripherals by type