diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 3e9503c..c8db7cf 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -182,6 +182,14 @@ void onMqttMessage(int messageSize) {
 }
 
 void processControlCommand(int64_t num) {
+	// Bounds checking: if num is outside 0-100, treat as 0.
+	if (num < 0 || num > 100) {
+		Serial.print("[MEGA] Input out of bounds (");
+		Serial.print(num);
+		Serial.println("), setting to 0.");
+		num = 0;
+	}
+
 	long mappedValue;
 	if (num == 0) {
 		mappedValue = 0; // Special case: 0 maps to 0