From fe841fb0ba4e499e097c533307e315291641eeec Mon Sep 17 00:00:00 2001
From: wuxu <aina360tian@gmail.com>
Date: Sat, 23 May 2026 08:56:26 +0800
Subject: [PATCH] fix dronecan zero data type handling

---
 src/dronecan/node.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/dronecan/node.js b/src/dronecan/node.js
index b72f730..f5091a6 100644
--- a/src/dronecan/node.js
+++ b/src/dronecan/node.js
@@ -187,7 +187,7 @@ class Node extends EventEmitter {
                     this.emit(topicName, transfer);
                 }
             } else {
-                if (!transfer.dataTypeId || !transfer.payload) {
+                if (transfer.dataTypeId === null || transfer.dataTypeId === undefined || !transfer.payload) {
                     // console.error('#TODO dataTypeId or payload is null');
                     return;
                 }
@@ -425,7 +425,7 @@ class Node extends EventEmitter {
     }
 
     fetchNodeParam(sourceNodeId, index, name, callback=null) {
-        // console.log('Fetching node param:', sourceNodeId, index, name);
+        console.log('Fetching node param:', sourceNodeId, index, name);
         // const currentRequestIndex = index;
         this.nodeParamsRequestingNodeId = sourceNodeId;
         this.setNodeParamsRequestingIndex(sourceNodeId, index);