diff --git a/js/msp.js b/js/msp.js
index 2569a83b..6359af16 100644
--- a/js/msp.js
+++ b/js/msp.js
@@ -210,6 +210,7 @@ function send_message(code, data, callback_sent, callback_msp) {
         var obj = {'code': code, 'callback': callback_msp};
         obj.timer = setInterval(function() {
             // re-send data again
+            console.log('MSP data request timed-out: ' + code);
             serial.send(bufferOut, function(writeInfo) {});
         }, 1000);