diff --git a/meshtastic/mesh.proto b/meshtastic/mesh.proto
index 21b6329..232d34f 100644
--- a/meshtastic/mesh.proto
+++ b/meshtastic/mesh.proto
@@ -829,6 +829,16 @@ enum HardwareModel {
    * RAK6421 Hat+
    */
   RAK6421 = 118;
+
+  /*
+   * Elecrow ThinkNode M4
+   */
+  THINKNODE_M4 = 119;
+
+  /*
+   * Elecrow ThinkNode M6
+   */
+  THINKNODE_M6 = 120;
   
   /*
    * ------------------------------------------------------------------------------------------------------------------------------------------