Fix GDK101 power on detection (#24242)

CHANGELOG.md

@@ -14,6 +14,7 @@ All notable changes to this project will be documented in this file.
 
 ### Fixed
 - ESP32 BLE not starting (#24240)
+- GDK101 power on detection (#24242)
 
 ### Removed
 

RELEASENOTES.md

@@ -126,6 +126,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 ### Fixed
 - ESP8266 TasmotaSerial flush receive buffer on executing `TasmotaSerial.flush();`
 - ESP32-P4 unique MQTT Client based on hosted MCU MAC address
+- GDK101 power on detection [#24242](https://github.com/arendst/Tasmota/issues/24242)
 - DALI watchdog exception
 - TuyaMCU v1 exception 28 regression from v15.1.0.1 reverted PR24063 [#24220](https://github.com/arendst/Tasmota/issues/24220)
 - ESP32 BLE not starting [#24240](https://github.com/arendst/Tasmota/issues/24240)

tasmota/tasmota_xsns_sensor/xsns_106_gdk101.ino

@@ -256,10 +256,11 @@ bool Xsns106(uint32_t function) {
 
   bool result = false;
 
-  if (FUNC_INIT == function) {
-    Gdk101Detect();
+  if (!Gdk.ready) {
+    if ((TasmotaGlobal.uptime < 20) && (FUNC_EVERY_SECOND == function)) {
+      Gdk101Detect();  // GDK101 power on ready can take 8 seconds so try every second for up to 20 seconds
     }
-  else if (Gdk.ready) {
+  } else {
     switch (function) {
       case FUNC_EVERY_SECOND:
         Gdk101EverySecond();