diff --git a/examples/companion_radio/main.cpp b/examples/companion_radio/main.cpp
index e719e900..29ec7028 100644
--- a/examples/companion_radio/main.cpp
+++ b/examples/companion_radio/main.cpp
@@ -1246,10 +1246,6 @@ void setup() {
   Serial.begin(115200);
 
   board.begin();
-#ifdef ESP32_CPU_FREQ
-  setCpuFrequencyMhz(ESP32_CPU_FREQ);
-#endif
-
 #ifdef SX126X_DIO3_TCXO_VOLTAGE
   float tcxo = SX126X_DIO3_TCXO_VOLTAGE;
 #else
diff --git a/examples/simple_repeater/main.cpp b/examples/simple_repeater/main.cpp
index e9f6d480..5743647b 100644
--- a/examples/simple_repeater/main.cpp
+++ b/examples/simple_repeater/main.cpp
@@ -664,10 +664,6 @@ void setup() {
   delay(1000);
 
   board.begin();
-
-#ifdef ESP32_CPU_FREQ
-  setCpuFrequencyMhz(ESP32_CPU_FREQ);
-#endif
 #ifdef ESP32
   fallback_clock.begin();
 #endif
diff --git a/examples/simple_room_server/main.cpp b/examples/simple_room_server/main.cpp
index 5f7d577a..285d59c6 100644
--- a/examples/simple_room_server/main.cpp
+++ b/examples/simple_room_server/main.cpp
@@ -726,11 +726,6 @@ void setup() {
   delay(1000);
 
   board.begin();
-
-#ifdef ESP32_CPU_FREQ
-  setCpuFrequencyMhz(ESP32_CPU_FREQ);
-#endif
-
 #ifdef ESP32
   fallback_clock.begin();
 #endif
diff --git a/examples/simple_secure_chat/main.cpp b/examples/simple_secure_chat/main.cpp
index f34f025f..951d51dc 100644
--- a/examples/simple_secure_chat/main.cpp
+++ b/examples/simple_secure_chat/main.cpp
@@ -566,11 +566,6 @@ void setup() {
   Serial.begin(115200);
 
   board.begin();
-
-#ifdef ESP32_CPU_FREQ
-  setCpuFrequencyMhz(ESP32_CPU_FREQ);
-#endif
-
 #ifdef SX126X_DIO3_TCXO_VOLTAGE
   float tcxo = SX126X_DIO3_TCXO_VOLTAGE;
 #else
diff --git a/platformio.ini b/platformio.ini
index 7ecb7ff4..d89737ea 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -31,6 +31,8 @@ extends = arduino_base
 platform = espressif32
 monitor_filters = esp32_exception_decoder
 extra_scripts = merge-bin.py
+build_flags = ${arduino_base.build_flags}
+;  -D ESP32_CPU_FREQ=80          ; change it to your need
 build_src_filter = ${arduino_base.build_src_filter}
 
 ; ================
@@ -126,7 +128,6 @@ build_flags =
   -D SX126X_DIO3_TCXO_VOLTAGE=1.8
   -D SX126X_CURRENT_LIMIT=130.0f  ; for best TX power!
   -D SX126X_RX_BOOSTED_GAIN=true
-  -D ESP32_CPU_FREQ=240
 build_src_filter = ${esp32_base.build_src_filter}
 lib_deps =
   ${esp32_base.lib_deps}
diff --git a/src/helpers/ESP32Board.h b/src/helpers/ESP32Board.h
index 45fb16bd..70e29575 100644
--- a/src/helpers/ESP32Board.h
+++ b/src/helpers/ESP32Board.h
@@ -17,6 +17,10 @@ public:
     // for future use, sub-classes SHOULD call this from their begin()
     startup_reason = BD_STARTUP_NORMAL;
 
+  #ifdef ESP32_CPU_FREQ
+    setCpuFrequencyMhz(ESP32_CPU_FREQ);
+  #endif
+
   #ifdef PIN_VBAT_READ
     // battery read support
     pinMode(PIN_VBAT_READ, INPUT);