diff --git a/meshtastic/mesh.proto b/meshtastic/mesh.proto
index e8b5205..bfefd00 100644
--- a/meshtastic/mesh.proto
+++ b/meshtastic/mesh.proto
@@ -334,6 +334,11 @@ enum HardwareModel {
    */
   RAK2560 = 22;
 
+  /*
+   * Heltec HRU-3601: https://heltec.org/project/hru-3601/
+   */
+  HELTEC_HRU_3601 = 23;
+
   /*
    * B&Q Consulting Station Edition G1: https://uniteng.com/wiki/doku.php?id=meshtastic:station
    */