#580 RTU gateway multi-modem wired/wireless failover networking

scada-common/ppm.lua

@@ -447,15 +447,15 @@ end
 ---@return table|nil reactor function table
 function ppm.get_fission_reactor() return ppm.get_device("fissionReactorLogicAdapter") end
 
--- get a wired modem by name
+-- get a modem by name
 ---@nodiscard
 ---@param iface string CC peripheral interface
 ---@return Modem|nil modem function table
-function ppm.get_wired_modem(iface)
+function ppm.get_modem(iface)
     local modem  = nil
     local device = ppm_sys.mounts[iface]
 
-    if device.type == "modem" then modem = device.dev end
+    if device and device.type == "modem" then modem = device.dev end
 
     return modem
 end