From be8b0dc22df71bc675ad08880cb2adef9e7d9385 Mon Sep 17 00:00:00 2001
From: Ashley Strahle <ash@jackofclubs.com.au>
Date: Tue, 30 Jun 2026 08:35:47 +0000
Subject: [PATCH] add debug prints around button press to find crash location

---
 src/app_task.cpp           |  8 ++++++--
 src/ble_midi_transport.cpp | 21 +++++++++++++++++++--
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/src/app_task.cpp b/src/app_task.cpp
index c0b8d32..c54c6f6 100644
--- a/src/app_task.cpp
+++ b/src/app_task.cpp
@@ -134,12 +134,16 @@ void AppTask::process_switch_event(uint8_t switch_id, bool pressed) {
         if (pad_mapping[i].physical_switch == switch_id) {
             uint8_t channel = pad_mapping[i].midi_channel;
             uint8_t cc_num = cc_map[i];
-            // Use palette index 127 (magenta) for visible feedback
             uint8_t value = pressed ? 127 : 0;
             
             if (pressed) {
                 usb_midi->send_cc(channel, cc_num, value);
-                if (ble_midi) ble_midi->send_cc(channel, cc_num, value);
+                Serial.println("[APP DEBUG] after usb send");
+                if (ble_midi) {
+                    Serial.println("[APP DEBUG] about to call ble send_cc");
+                    ble_midi->send_cc(channel, cc_num, value);
+                    Serial.println("[APP DEBUG] after ble send_cc");
+                }
             }
             
             Serial.printf("[APP] Switch %d -> Ch%d CC%d Val%d (%s)\n",
diff --git a/src/ble_midi_transport.cpp b/src/ble_midi_transport.cpp
index 8450bd6..d9ff06d 100644
--- a/src/ble_midi_transport.cpp
+++ b/src/ble_midi_transport.cpp
@@ -111,9 +111,21 @@ void BleMidiTransport::on_midi_receive(std::function<void(const MidiEvent&)> cal
 }
 
 void BleMidiTransport::send_midi_packet(const uint8_t* data, uint8_t len) {
-    if (!initialized || !client_connected || !ble_char) return;
+    if (!initialized) {
+        Serial.println("[BLE DBG] send_midi_packet: not initialized");
+        return;
+    }
+    if (!client_connected) {
+        Serial.println("[BLE DBG] send_midi_packet: no client");
+        return;
+    }
+    if (!ble_char) {
+        Serial.println("[BLE DBG] send_midi_packet: null char");
+        return;
+    }
+
+    Serial.println("[BLE DBG] send_midi_packet: proceeding to send");
 
-    // BLE MIDI format: timestamp header + raw MIDI message
     uint16_t timestamp = micros() & 0x3FFF;
     uint8_t packet[16];
     uint8_t idx = 0;
@@ -123,8 +135,11 @@ void BleMidiTransport::send_midi_packet(const uint8_t* data, uint8_t len) {
         packet[idx++] = data[i];
     }
 
+    Serial.println("[BLE DBG] calling setValue...");
     ble_char->setValue(packet, idx);
+    Serial.println("[BLE DBG] calling notify...");
     ble_char->notify();
+    Serial.println("[BLE DBG] notify done");
 }
 
 void BleMidiTransport::send_note_on(uint8_t channel, uint8_t note, uint8_t velocity) {
@@ -140,6 +155,8 @@ void BleMidiTransport::send_note_off(uint8_t channel, uint8_t note, uint8_t velo
 }
 
 void BleMidiTransport::send_cc(uint8_t channel, uint8_t cc, uint8_t value) {
+    Serial.printf("[BLE DBG] send_cc entered: ch=%d cc=%d val=%d init=%d conn=%d char=%p\n",
+                  channel, cc, value, initialized, client_connected, ble_char);
     uint8_t packet[3] = {(uint8_t)(0xB0 | (channel - 1)), cc, value};
     send_midi_packet(packet, 3);
     Serial.printf("[BLE OUT] Ch:%d CC:%d:%d\n", channel, cc, value);