From 9e2de40b9b3fe4dda30fd560e59f4094782623ae Mon Sep 17 00:00:00 2001
From: awalol <61059886+awalol@users.noreply.github.com>
Date: Sat, 16 May 2026 13:51:29 +0800
Subject: [PATCH] Add bt_get_signal_strength Comment

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
---
 src/bt.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/bt.cpp b/src/bt.cpp
index c830099..527b5cb 100644
--- a/src/bt.cpp
+++ b/src/bt.cpp
@@ -77,12 +77,15 @@ bool bt_disconnect() {
 }
 
 void bt_get_signal_strength(int8_t *rssi) {
-    if (acl_handle != HCI_CON_HANDLE_INVALID) {
-        gap_read_rssi(acl_handle);
-    }
+    // gap_read_rssi() completes asynchronously, so this function can only
+    // return the last cached RSSI value. Trigger a refresh afterwards so a
+    // subsequent call can observe the updated value once the RSSI event arrives.
     if (rssi != nullptr) {
         *rssi = bt_rssi;
     }
+    if (acl_handle != HCI_CON_HANDLE_INVALID) {
+        gap_read_rssi(acl_handle);
+    }
 }
 
 void bt_l2cap_init() {