diff --git a/platformio.ini b/platformio.ini
index 579cd667..5e9adf89 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -12,8 +12,8 @@
 ; ---> SELECT TARGET PLATFORM HERE! <---
 [platformio]
 ;env_default = test
-env_default = generic
-;env_default = heltec
+;env_default = generic
+env_default = heltec
 ;env_default = ttgov1
 ;env_default = ttgov2
 ;env_default = ttgov21
diff --git a/src/globals.h b/src/globals.h
index 9ce9802c..485b5c48 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -8,7 +8,7 @@
 #include <esp32-hal-log.h>
 
 // attn: increment version after modifications to configData_t truct!
-#define PROGVERSION "1.3.96" // use max 10 chars here!
+#define PROGVERSION "1.3.97" // use max 10 chars here!
 #define PROGNAME "PAXCNT"
 
 // std::set for unified array functions
diff --git a/src/hal/generic.h b/src/hal/generic.h
index 18b215b8..52fa279c 100644
--- a/src/hal/generic.h
+++ b/src/hal/generic.h
@@ -15,6 +15,9 @@
 
 #define HAS_LED GPIO_NUM_21 // on board  LED
 #define HAS_BUTTON GPIO_NUM_39 // on board button
+#define HAS_RGB_LED   GPIO_NUM_0  // WS2812B RGB LED on GPIO0
+
+#define BOARD_HAS_PSRAM // use extra 4MB extern RAM
 
 #define HAS_GPS 1 // use if board has GPS
 #define GPS_SERIAL 9600, SERIAL_8N1, GPIO_NUM_12, GPIO_NUM_15 // UBlox NEO 6M or 7M with default configuration
diff --git a/src/wifiscan.cpp b/src/wifiscan.cpp
index 8400117b..4190e182 100644
--- a/src/wifiscan.cpp
+++ b/src/wifiscan.cpp
@@ -18,13 +18,11 @@ IRAM_ATTR void wifi_sniffer_packet_handler(void *buff,
   const wifi_ieee80211_mac_hdr_t *hdr = &ipkt->hdr;
 
   if ((cfg.rssilimit) &&
-      (ppkt->rx_ctrl.rssi < cfg.rssilimit)) { // rssi is negative value
-    ESP_LOGI(TAG, "WiFi RSSI %d -> ignoring (limit: %d)", ppkt->rx_ctrl.rssi,
+      (ppkt->rx_ctrl.rssi < cfg.rssilimit)) // rssi is negative value
+    ESP_LOGD(TAG, "WiFi RSSI %d -> ignoring (limit: %d)", ppkt->rx_ctrl.rssi,
              cfg.rssilimit);
-  } else {
-    uint8_t *p = (uint8_t *)hdr->addr2;
-    mac_add(p, ppkt->rx_ctrl.rssi, MAC_SNIFF_WIFI);
-  }
+  else // count seen MAC
+    mac_add((uint8_t *)hdr->addr2, ppkt->rx_ctrl.rssi, MAC_SNIFF_WIFI);
 }
 
 void wifi_sniffer_init(void) {
@@ -44,16 +42,6 @@ void wifi_sniffer_init(void) {
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous(true)); // now switch on monitor mode
 }
 
-void wifi_sniffer_set_channel(uint8_t channel) {
-  esp_wifi_set_channel(channel, WIFI_SECOND_CHAN_NONE);
-}
-
-void IRAM_ATTR ChannelSwitchIRQ() {
-  portENTER_CRITICAL(&timerMux);
-  ChannelTimerIRQ++;
-  portEXIT_CRITICAL(&timerMux);
-}
-
 // Wifi channel rotation task
 void wifi_channel_loop(void *pvParameters) {
 
@@ -67,11 +55,18 @@ void wifi_channel_loop(void *pvParameters) {
       portEXIT_CRITICAL(&timerMux);
       // rotates variable channel 1..WIFI_CHANNEL_MAX
       channel = (channel % WIFI_CHANNEL_MAX) + 1;
-      wifi_sniffer_set_channel(channel);
+      esp_wifi_set_channel(channel, WIFI_SECOND_CHAN_NONE);
       ESP_LOGD(TAG, "Wifi set channel %d", channel);
 
       vTaskDelay(1 / portTICK_PERIOD_MS); // reset watchdog
     }
 
   } // end of infinite wifi channel rotation loop
+}
+
+// IRQ handler
+void IRAM_ATTR ChannelSwitchIRQ() {
+  portENTER_CRITICAL(&timerMux);
+  ChannelTimerIRQ++;
+  portEXIT_CRITICAL(&timerMux);
 }
\ No newline at end of file
diff --git a/src/wifiscan.h b/src/wifiscan.h
index d442eccd..afd5700e 100644
--- a/src/wifiscan.h
+++ b/src/wifiscan.h
@@ -26,7 +26,6 @@ typedef struct {
 } wifi_ieee80211_packet_t;
 
 void wifi_sniffer_init(void);
-void wifi_sniffer_set_channel(uint8_t channel);
 void wifi_sniffer_packet_handler(void *buff, wifi_promiscuous_pkt_type_t type);
 void ChannelSwitchIRQ(void);
 void wifi_channel_loop(void *pvParameters);