diff --git a/web/app.js b/web/app.js
index 4e17dc1..8f0e99d 100644
--- a/web/app.js
+++ b/web/app.js
@@ -184,7 +184,7 @@ async function writeConfigBlob() {
   view.setUint8(19, 0);
 
   try {
-    await chars.configBlob.writeValue(buf);
+    await chars.configBlob.writeValueWithResponse(buf);
     log(`Config written — sens=${config.sensitivity.toFixed(0)} tapThr=${config.tapThreshold} tapAction=${config.tapAction}`,'ok');
   } catch(e) { log(`Config write failed: ${e.message}`,'err'); }
 }
@@ -237,7 +237,7 @@ function onTapKeyInput() {
 
 async function sendCalibrate() {
   if (!chars.command) return;
-  try { await chars.command.writeValue(new Uint8Array([0x01])); log('Calibration sent — hold still!','warn'); }
+  try { await chars.command.writeValueWithoutResponse(new Uint8Array([0x01])); log('Calibration sent — hold still!','warn'); }
   catch(e) { log(`Calibrate failed: ${e.message}`,'err'); }
 }
 function confirmReset() { document.getElementById('overlay').classList.add('show'); }
@@ -245,7 +245,7 @@ function closeModal()   { document.getElementById('overlay').classList.remove('s
 async function doReset() {
   closeModal(); if (!chars.command) return;
   try {
-    await chars.command.writeValue(new Uint8Array([0xFF]));
+    await chars.command.writeValueWithoutResponse(new Uint8Array([0xFF]));
     log('Factory reset sent…','warn');
     setTimeout(async () => { await readConfigBlob(); log('Config reloaded','ok'); }, 1500);
   } catch(e) { log(`Reset failed: ${e.message}`,'err'); }