From 7f9bf3a758c090b8d69839f2a5e871796cf6377e Mon Sep 17 00:00:00 2001
From: Gordon Williams <gw@pur3.co.uk>
Date: Mon, 16 May 2022 14:32:35 +0100
Subject: [PATCH] Add option to use lower write size for phones with
 potentially iffy Bluetooth stacks (fix #)1834

---
 index.html |  4 ++++
 loader.js  | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/index.html b/index.html
index de7facd5a..b141cffc9 100644
--- a/index.html
+++ b/index.html
@@ -147,6 +147,10 @@
             <input type="checkbox" id="settings-settime">
             <i class="form-icon"></i> Always update time when we connect
           </label>
+          <label class="form-switch">
+            <input type="checkbox" id="settings-ble-compat">
+            <i class="form-icon"></i> Bluetooth Compatibility mode (limit to 20 byte writes)
+          </label>
           <div class="form-group">
             <select class="form-select form-inline"  id="settings-lang" style="width: 10em">
               <option value="">None (English)</option>
diff --git a/loader.js b/loader.js
index 42db3f430..e9887f3d4 100644
--- a/loader.js
+++ b/loader.js
@@ -194,6 +194,17 @@ window.addEventListener('load', (event) => {
     });
   });
 
+  // BLE Compatibility
+  var selectLang = document.getElementById("settings-ble-compat");
+  if (SETTINGS.bleCompat!==undefined)
+    Puck.increaseMTU = !SETTINGS.bleCompat;
+  selectLang.addEventListener("change",event=>{
+    console.log("BLE compatibility mode "+(event.target.checked?"on":"off"));
+    SETTINGS.bleCompat = event.target.checked;
+    Puck.increaseMTU = !SETTINGS.bleCompat;
+    saveSettings();
+  });
+
   // Load language list
   httpGet("lang/index.json").then(languagesJSON=>{
     var languages;