From 2cf49b8deb0295c182c52462a48d9045ff73eb4e Mon Sep 17 00:00:00 2001
From: Ashley Strahle <ash@jackofclubs.com.au>
Date: Thu, 2 Jul 2026 04:19:30 +0000
Subject: [PATCH] Calibrate expression pedal: cal_min=36, cal_max=1239

Raw ADC observed range: heel=36, toe=1239.
Maps full pedal travel to MIDI 0-127.
---
 src/expression_pedal.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/expression_pedal.cpp b/src/expression_pedal.cpp
index 5feceac..b86843d 100644
--- a/src/expression_pedal.cpp
+++ b/src/expression_pedal.cpp
@@ -10,8 +10,8 @@ ExpressionPedal::ExpressionPedal(uint8_t adc_pin)
     , midi_cc(4)
     , last_read_time(0)
     , current_raw(0)
-    , cal_min(0)
-    , cal_max(4095)
+    , cal_min(36)
+    , cal_max(1239)
 {
 }