diff --git a/AltSensorTesting/AltSensorTesting.ino b/AltSensorTesting/AltSensorTesting.ino
index 50695af..39a5385 100644
--- a/AltSensorTesting/AltSensorTesting.ino
+++ b/AltSensorTesting/AltSensorTesting.ino
@@ -111,13 +111,14 @@ static void printBoundaries() {
 
 // ── State ────────────────────────────────────────────────────
 bool sampling = false;
+bool rawMode  = false;
 
 // ═════════════════════════════════════════════════════════════
 void setup() {
   Serial.begin(2000000);
   pinMode(OOR_PIN, INPUT);
   setupADC();
-  Serial.println(F("Send '1' to start sampling, '0' to stop and print bounds."));
+  Serial.println(F("Send '1' to start sampling, '0' to stop and print bounds, '2' for raw ADC output."));
 }
 
 void loop() {
@@ -128,10 +129,16 @@ void loop() {
 
     if (cmd.charAt(0) == '1') {
       sampling = true;
+      rawMode  = false;
       resetTracking();
       Serial.println(F("Sampling started."));
+    } else if (cmd.charAt(0) == '2') {
+      sampling = true;
+      rawMode  = true;
+      Serial.println(F("Raw ADC output started."));
     } else if (cmd.charAt(0) == '0') {
       sampling = false;
+      rawMode  = false;
       Serial.println(F("Sampling stopped."));
       printBoundaries();
     }
@@ -153,6 +160,16 @@ void loop() {
 
   if (!ready) return;  // nothing new — come back next iteration
 
+  if (rawMode) {
+    long mm_x100 = map(val, 178, 895, 1600, 2600);
+    Serial.print(mm_x100 / 100);
+    Serial.print('.');
+    long frac = mm_x100 % 100;
+    if (frac < 10) Serial.print('0');
+    Serial.println(frac);
+    return;
+  }
+
   // All values here are in-range (OOR filtered in ISR)
   trackLowest(val);
   trackHighest(val);