diff --git a/zb-node.js b/zb-node.js
index c2540fe..65e70d5 100644
--- a/zb-node.js
+++ b/zb-node.js
@@ -1271,7 +1271,12 @@ class ZigbeeNode extends Device {
           return;
       }
 
-      // Generate a defaultRsp
+      // Generate a defaultRsp. Note that the deConz dongle may send us
+      // group casts, which are indicated by a dstAddrMode of 1. This happens
+      // when using the IKEA motion sensor.
+
+      // TODO: Don't send defaultRsp to group broadcasts
+
       if (frame.zcl.frameCntl.disDefaultRsp == 0 &&
           this.isZclStatusSuccess(frame)) {
         const defaultRspFrame =
@@ -1774,6 +1779,22 @@ class ZigbeeNode extends Device {
     const sourceEndpoint = parseInt(frame.sourceEndpoint, 16);
     const destinationEndpoint = parseInt(frame.destinationEndpoint, 16);
 
+    // The zcl-packet library expects the cmdId in the payload to be a number,
+    // but when it delivered the original frame to us, frame.zcl.cmdId is
+    // a string. So we need to convert it back to a number.
+
+    let zclCmd;
+    if (frame.zcl.frameCntl.frameType == 0) {
+      zclCmd = zclId.foundation(frame.zcl.cmdId);
+    } else if (frame.zcl.frameCntl.frameType == 1) {
+      const clusterId = parseInt(frame.clusterId, 16);
+      zclCmd = zclId.functional(clusterId, frame.zcl.cmdId);
+    }
+    let cmdId = 0;
+    if (zclCmd) {
+      cmdId = zclCmd.value;
+    }
+
     this.zclSeqNum = frame.zcl.seqNum;
     const rspFrame = this.makeZclFrame(
       sourceEndpoint,
@@ -1787,7 +1808,7 @@ class ZigbeeNode extends Device {
           disDefaultRsp: 1,
         },
         payload: {
-          cmdId: frame.zcl.cmdId,
+          cmdId: cmdId,
           statusCode: statusCode,
         },
       }