diff --git a/include/lorawan.h b/include/lorawan.h
index 72f42d26..11e45b4d 100644
--- a/include/lorawan.h
+++ b/include/lorawan.h
@@ -43,10 +43,10 @@ void showLoraKeys(void);
 void lora_send(void *pvParameters);
 void lora_enqueuedata(MessageBuffer_t *message);
 void lora_queuereset(void);
-static void IRAM_ATTR myEventCallback(void *pUserData, ev_t ev);
-static void IRAM_ATTR myRxCallback(void *pUserData, uint8_t port,
+void IRAM_ATTR myEventCallback(void *pUserData, ev_t ev);
+void IRAM_ATTR myRxCallback(void *pUserData, uint8_t port,
                                    const uint8_t *pMsg, size_t nMsg);
-static void IRAM_ATTR myTxCallback(void *pUserData, int fSuccess);
+void IRAM_ATTR myTxCallback(void *pUserData, int fSuccess);
 void mac_decode(const uint8_t cmd[], const uint8_t cmdlen, const mac_t table[],
                 const uint8_t tablesize);
 uint8_t getBattLevel(void);
diff --git a/include/ota.h b/include/ota.h
index 6a92720d..cec28750 100644
--- a/include/ota.h
+++ b/include/ota.h
@@ -17,7 +17,7 @@ void start_ota_update();
 int version_compare(const String v1, const String v2);
 void ota_display(const uint8_t row, const std::string status,
                  const std::string msg);
-static void show_progress(unsigned long current, unsigned long size);
+void show_progress(unsigned long current, unsigned long size);
 
 #endif // USE_OTA
 
diff --git a/include/wifiscan.h b/include/wifiscan.h
index 340208cb..2e093cf8 100644
--- a/include/wifiscan.h
+++ b/include/wifiscan.h
@@ -9,7 +9,7 @@
 
 void wifi_sniffer_init(void);
 void switch_wifi_sniffer (uint8_t state);
-static void IRAM_ATTR wifi_sniffer_packet_handler(void *buff, wifi_promiscuous_pkt_type_t type);
+void IRAM_ATTR wifi_sniffer_packet_handler(void *buff, wifi_promiscuous_pkt_type_t type);
 void switchWifiChannel(TimerHandle_t xTimer);
 
 #endif
\ No newline at end of file
diff --git a/src/lorawan.cpp b/src/lorawan.cpp
index ff8ecfe7..36c42b35 100644
--- a/src/lorawan.cpp
+++ b/src/lorawan.cpp
@@ -452,7 +452,7 @@ void lmictask(void *pvParameters) {
 } // lmictask
 
 // lmic event handler
-static void myEventCallback(void *pUserData, ev_t ev) {
+void myEventCallback(void *pUserData, ev_t ev) {
 
   // using message descriptors from LMIC library
   static const char *const evNames[] = {LMIC_EVENT_NAME_TABLE__INIT};
@@ -502,7 +502,7 @@ static void myEventCallback(void *pUserData, ev_t ev) {
 }
 
 // receive message handler
-static void myRxCallback(void *pUserData, uint8_t port, const uint8_t *pMsg,
+void myRxCallback(void *pUserData, uint8_t port, const uint8_t *pMsg,
                          size_t nMsg) {
 
   // display type of received data
@@ -557,7 +557,7 @@ static void myRxCallback(void *pUserData, uint8_t port, const uint8_t *pMsg,
 }
 
 // transmit complete message handler
-static void myTxCallback(void *pUserData, int fSuccess) {
+void myTxCallback(void *pUserData, int fSuccess) {
 
 #if (TIME_SYNC_LORASERVER)
   // if last packet sent was a timesync request, store TX timestamp
diff --git a/src/ota.cpp b/src/ota.cpp
index 10938b0d..10a9ed43 100644
--- a/src/ota.cpp
+++ b/src/ota.cpp
@@ -318,7 +318,7 @@ void ota_display(const uint8_t row, const std::string status,
 }
 
 // callback function to show download progress while streaming data
-static void show_progress(unsigned long current, unsigned long size) {
+void show_progress(unsigned long current, unsigned long size) {
 #ifdef HAS_DISPLAY
   char buf[17];
   snprintf(buf, 17, "%-9lu (%3lu%%)", current, current * 100 / size);
diff --git a/src/wifiscan.cpp b/src/wifiscan.cpp
index dc2fd29d..13e03e2b 100644
--- a/src/wifiscan.cpp
+++ b/src/wifiscan.cpp
@@ -29,8 +29,8 @@ typedef struct {
 } wifi_ieee80211_packet_t;
 
 // using IRAM_:ATTR here to speed up callback function
-static IRAM_ATTR void
-wifi_sniffer_packet_handler(void *buff, wifi_promiscuous_pkt_type_t type) {
+IRAM_ATTR void wifi_sniffer_packet_handler(void *buff,
+                                           wifi_promiscuous_pkt_type_t type) {
 
   const wifi_promiscuous_pkt_t *ppkt = (wifi_promiscuous_pkt_t *)buff;
   const wifi_ieee80211_packet_t *ipkt =
@@ -75,7 +75,7 @@ void wifi_sniffer_init(void) {
   ESP_ERROR_CHECK(esp_wifi_set_ps(WIFI_PS_NONE)); // no modem power saving
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous_filter(&filter)); // set frame filter
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous_rx_cb(&wifi_sniffer_packet_handler));
-  ESP_ERROR_CHECK(esp_wifi_start()); //for esp_wifi v3.3
+  ESP_ERROR_CHECK(esp_wifi_start());               // for esp_wifi v3.3
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous(true)); // now switch on monitor mode
 
   // setup wifi channel rotation timer