diff --git a/log.capnp b/log.capnp
index 858c17a4d66eca..fe5ffdf6c20ad5 100644
--- a/log.capnp
+++ b/log.capnp
@@ -279,6 +279,7 @@ struct ThermalData {
   batteryCurrent @15 :Int32;
   batteryVoltage @16 :Int32;
   usbOnline @12 :Bool;
+  networkType @22 :NetworkType;
 
   fanSpeed @10 :UInt16;
   started @11 :Bool;
@@ -297,6 +298,15 @@ struct ThermalData {
     red @2;     # no engage, will disengage
     danger @3;  # immediate process shutdown
   }
+
+  enum NetworkType {
+    none @0;
+    wifi @1;
+    cell2G @2;
+    cell3G @3;
+    cell4G @4;
+    cell5G @5;
+  }
 }
 
 struct HealthData {