only read command if port is ready

2019-07-30 10:16:07 -04:00 · 2019-07-30 10:16:07 -04:00 · bedd122047
parent a8b3697d06
commit bedd122047
1 changed files with 3 additions and 1 deletions
--- a/firmware/armCtl/armCtl.ino
+++ b/firmware/armCtl/armCtl.ino
@ -267,7 +267,9 @@ void setup() {
 //
 void loop() {
  // read from serial port
-  readCommand();
+  if (Serial) {
+    readCommand();
+  }
 
  // sequence the arm.
  r.sequence();