diff --git a/src/antenna.cpp b/src/antenna.cpp
index bcbf1703..6c083275 100644
--- a/src/antenna.cpp
+++ b/src/antenna.cpp
@@ -5,7 +5,7 @@
 #include <Arduino.h>
 
 // Local logging tag
-static const char *TAG = "antenna";
+static const char* TAG = "wifi";
 
 typedef enum {
     ANTENNA_INT = 0,
diff --git a/src/blecsan.cpp b/src/blecsan.cpp
index 3610def6..18df2135 100644
--- a/src/blecsan.cpp
+++ b/src/blecsan.cpp
@@ -17,7 +17,7 @@ https://github.com/nkolban/esp32-snippets/tree/master/BLE/scanner
 #define BT_BD_ADDR_HEX(addr)   addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]
 
 // local Tag for logging
-static const char *TAG = "blescan";
+static const char* TAG = "bluetooth";
 
 // defined in macsniff.cpp
 bool mac_add(uint8_t *paddr, int8_t rssi, bool sniff_type);
@@ -92,9 +92,8 @@ static const char *btsig_gap_type(uint32_t gap_type) {
 IRAM_ATTR static void gap_callback_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param)
 {
 	esp_ble_gap_cb_param_t *p = (esp_ble_gap_cb_param_t *)param;
-	esp_err_t status;	
-
-	ESP_LOGD(tag, "BT payload rcvd -> type: 0x%.2x -> %s", *p->scan_rst.ble_adv, btsig_gap_type(*p->scan_rst.ble_adv));		
+	
+	ESP_LOGD(TAG, "BT payload rcvd -> type: 0x%.2x -> %s", *p->scan_rst.ble_adv, btsig_gap_type(*p->scan_rst.ble_adv));		
 
 	switch (event) 
 	{
diff --git a/src/configmanager.cpp b/src/configmanager.cpp
index 808af4b6..5f00752e 100644
--- a/src/configmanager.cpp
+++ b/src/configmanager.cpp
@@ -5,7 +5,7 @@
 #include <nvs_flash.h>
 
 // Local logging tag
-static const char *TAG = "configmanager";
+static const char* TAG = "flash";
 
 nvs_handle my_handle;
 
diff --git a/src/lorawan.cpp b/src/lorawan.cpp
index 4cde6d3f..87a5c58f 100644
--- a/src/lorawan.cpp
+++ b/src/lorawan.cpp
@@ -11,7 +11,7 @@
 #endif
 
 // Local logging Tag
-static const char *TAG = "lorawan";
+static const char* TAG = "lora";
 
 // functions defined in rcommand.cpp
 void rcommand(uint8_t cmd, uint8_t arg);
@@ -79,8 +79,6 @@ void get_hard_deveui(uint8_t *pdeveui) {
 
 // Display a key
 void printKey(const char * name, const uint8_t * key, uint8_t len, bool lsb) {
-  uint8_t start=lsb?len:0;
-  uint8_t end = lsb?0:len;
   const uint8_t * p ;
   char keystring[len+1] = "", keybyte[3];
   for (uint8_t i=0; i<len ; i++) {
@@ -170,7 +168,7 @@ void onEvent (ev_t ev) {
         case EV_JOINED:
 
             strcpy_P(buff, PSTR("JOINED"));
-            sprintf(display_lora, ""); // clear previous lmic status message from display
+            sprintf(display_lora, " "); // clear previous lmic status message from display
 
             // Disable link check validation (automatically enabled
             // during join, but not supported by TTN at this time).  -> do we need this?
@@ -188,7 +186,7 @@ void onEvent (ev_t ev) {
         case EV_TXCOMPLETE:
 
             strcpy_P(buff, (LMIC.txrxFlags & TXRX_ACK) ? PSTR("RECEIVED ACK") : PSTR("TX COMPLETE")); 
-            sprintf(display_lora, ""); // clear previous lmic status message from display
+            sprintf(display_lora, " "); // clear previous lmic status message from display
             
             if (LMIC.dataLen) {
                 ESP_LOGI(TAG, "Received %d bytes of payload, RSSI %d SNR %d", LMIC.dataLen, LMIC.rssi, (signed char)LMIC.snr / 4);
diff --git a/src/macsniff.cpp b/src/macsniff.cpp
index a3712b1a..0f566349 100644
--- a/src/macsniff.cpp
+++ b/src/macsniff.cpp
@@ -3,13 +3,11 @@
 #include "globals.h"
 
 #ifdef VENDORFILTER
-    #include <array>
-    #include <algorithm>
     #include "vendor_array.h"
 #endif
 
 // Local logging tag
-static const char *TAG = "macsniff";
+static const char* TAG = "wifi";
 
 static wifi_country_t wifi_country = {.cc=WIFI_MY_COUNTRY, .schan=WIFI_CHANNEL_MIN, .nchan=WIFI_CHANNEL_MAX, .policy=WIFI_COUNTRY_POLICY_MANUAL};
 
diff --git a/src/main.cpp b/src/main.cpp
index a33e5787..2b1b3e67 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -61,9 +61,7 @@ std::set<uint16_t> macs; // associative container holds total of unique MAC adre
 static volatile int ButtonPressed = 0, DisplayTimerIRQ = 0, ChannelTimerIRQ = 0;
 
 // local Tag for logging
-static const char *TAG = "paxcnt";
-// Note: Log level control seems not working during runtime,
-// so we need to switch loglevel by compiler build option in platformio.ini
+static const char* TAG = "main";
 
 #ifndef VERBOSE
 int redirect_log(const char * fmt, va_list args) {
@@ -241,8 +239,6 @@ uint64_t uptime() {
 
     // Print a key on display
     void DisplayKey(const uint8_t * key, uint8_t len, bool lsb) {
-        uint8_t start=lsb?len:0;
-        uint8_t end = lsb?0:len;
         const uint8_t * p ;
         for (uint8_t i=0; i<len ; i++) {
             p = lsb ? key+len-i-1 : key+i;
@@ -413,7 +409,7 @@ uint64_t uptime() {
                 // small blink 10ms on each 1/2sec (not when joining)
                 LEDState = ((millis() % 500) < 20) ? LED_ON : LED_OFF;
             // This should not happen so indicate a problem
-            } else  if ( LMIC.opmode & (OP_TXDATA | OP_TXRXPEND | OP_JOINING | OP_REJOIN) == 0 ) {
+            } else  if ( LMIC.opmode & ((OP_TXDATA | OP_TXRXPEND | OP_JOINING | OP_REJOIN) == 0 ) ) {
                 LEDColor = COLOR_RED;
                 // heartbeat long blink 200ms on each 2 seconds
                 LEDState = ((millis() % 2000) < 200) ? LED_ON : LED_OFF;
diff --git a/src/rcommand.cpp b/src/rcommand.cpp
index 1920abf5..0d8427f4 100644
--- a/src/rcommand.cpp
+++ b/src/rcommand.cpp
@@ -10,7 +10,7 @@
 #include <hal/hal.h>
 
 // Local logging tag
-static const char *TAG = "rcommand";
+static const char* TAG = "main";
 
 // table of remote commands and assigned functions
 typedef struct {