don't overflow serial buffer

diff --git a/rpi_promini/rpi_promini.ino b/rpi_promini/rpi_promini.ino
index 73d3092..81964a3 100644 (file)
--- a/rpi_promini/rpi_promini.ino
+++ b/rpi_promini/rpi_promini.ino
@@ -154,7 +154,7 @@ void loop() {
        Serial.println(dht.getStatusString());
      }
 
-     if ( input >= 0x30 && input <= 0x39 ) {
+     if ( input >= 0x30 && input <= 0x39 && serial_pos < 2 ) {
        input = input - 0x30; // ASCII to number
        serial_data[serial_pos++] = input;
      } else {