diff --git a/hr50-remote-display.ino b/hr50-remote-display.ino
index bd7068c..a91d148 100644
--- a/hr50-remote-display.ino
+++ b/hr50-remote-display.ino
@@ -50,7 +50,7 @@ void loop() {
     deserializeJson(doc, payload);
     JsonObject obj = doc.as<JsonObject>();
 
-    if ( obj != NULL ) {
+    if ( obj != NULL and obj["PTT"].as<String>() != "ERR") {
       String band = obj["BND"].as<String>();
       String pep = obj["PEP"].as<String>();
       String avg = obj["AVG"].as<String>();