Packet traffic indicator

include/globals.h

@@ -108,9 +108,9 @@ extern std::array<uint64_t, 0xff> beacons;
 
 extern configData_t cfg;                      // current device configuration
 extern char display_line6[], display_line7[]; // screen buffers
-extern uint8_t volatile channel;              // wifi channel rotation counter
 extern uint16_t volatile macs_total, macs_wifi, macs_ble,
-    batt_voltage;                   // display values
+    batt_voltage; // display values
+extern uint32_t volatile PacketCounter; // sniffed packet counter
 extern bool volatile TimePulseTick; // 1sec pps flag set by GPS or RTC
 extern timesource_t timeSource;
 extern hw_timer_t *displayIRQ, *matrixDisplayIRQ, *ppsIRQ, *gpsIRQ;

src/display.cpp

@@ -11,12 +11,13 @@ Display-Mask (128 x 64 pixel):
 1|PAX:aabbccddee
 2|B:a.bcV  Sats:ab
 3|BLTH:abcde SF:ab
-4|WIFI:abcde ch:ab
+4|WIFI:abcde  ****
 5|RLIM:abcd abcdKB
 6|xxxxxxxxxxxxxxxx
 6|20:27:00* 27.Feb
 7|yyyyyyyyyyyyyyab
   
+line 4: **** = Packet traffic indicator
 line 6: x = Text for LORA status OR time/date
 line 7: y = Text for LMIC status; ab = payload queue
 
@@ -224,11 +225,22 @@ void draw_page(time_t t, uint8_t page) {
       u8x8.setInverseFont(0);
 #endif // HAS_LORA
 
-    // line 4: update wifi counter + channel display
+    // line 4: update wifi counter + packet density display
     u8x8.setCursor(0, 4);
     u8x8.printf("WIFI:%-5d", macs_wifi);
-    u8x8.setCursor(11, 4);
-    u8x8.printf("ch:%02d", channel);
+    // display and reset packetcounter
+    u8x8.setCursor(12, 4);
+    if (PacketCounter > (100000 / DISPLAYREFRESH_MS))
+      u8x8.printf("****");
+    else if (PacketCounter > (10000 / DISPLAYREFRESH_MS))
+      u8x8.printf(" ***");
+    else if (PacketCounter > (1000 / DISPLAYREFRESH_MS))
+      u8x8.printf("  **");
+    else if (PacketCounter > 0)
+      u8x8.printf("   *");
+    else
+      u8x8.printf("    ");
+    PacketCounter = 0;
 
     // line 5: update RSSI limiter status & free memory display
     u8x8.setCursor(0, 5);

src/main.cpp

@@ -81,9 +81,9 @@ triggers pps 1 sec impulse
 
 configData_t cfg; // struct holds current device configuration
 char display_line6[16], display_line7[16]; // display buffers
-uint8_t volatile channel = 0;              // channel rotation counter
 uint16_t volatile macs_total = 0, macs_wifi = 0, macs_ble = 0,
-                  batt_voltage = 0; // globals for display
+                  batt_voltage = 0;  // globals for display
+uint32_t volatile PacketCounter = 0; // sniffed packet counter
 
 hw_timer_t *ppsIRQ = NULL, *displayIRQ = NULL, *matrixDisplayIRQ = NULL,
            *gpsIRQ = NULL;

src/wifiscan.cpp

@@ -37,6 +37,8 @@ IRAM_ATTR void wifi_sniffer_packet_handler(void *buff,
       (wifi_ieee80211_packet_t *)ppkt->payload;
   const wifi_ieee80211_mac_hdr_t *hdr = &ipkt->hdr;
 
+  PacketCounter++; // increase packets per second counter
+
   if ((cfg.rssilimit) &&
       (ppkt->rx_ctrl.rssi < cfg.rssilimit)) // rssi is negative value
     ESP_LOGD(TAG, "WiFi RSSI %d -> ignoring (limit: %d)", ppkt->rx_ctrl.rssi,
@@ -45,8 +47,9 @@ IRAM_ATTR void wifi_sniffer_packet_handler(void *buff,
     mac_add((uint8_t *)hdr->addr2, ppkt->rx_ctrl.rssi, MAC_SNIFF_WIFI);
 }
 
-// Software-timer driven Wifi channel rotation callback function
+// Software-timer driven Wifi channel rotation function
 void switchWifiChannel(TimerHandle_t xTimer) {
+  static uint8_t channel = 0; // channel rotation counter
   channel =
       (channel % WIFI_CHANNEL_MAX) + 1; // rotate channel 1..WIFI_CHANNEL_MAX
   esp_wifi_set_channel(channel, WIFI_SECOND_CHAN_NONE);
@@ -57,13 +60,13 @@ void wifi_sniffer_init(void) {
   wificfg.nvs_enable = 0;        // we don't need any wifi settings from NVRAM
   wificfg.wifi_task_core_id = 0; // we want wifi task running on core 0
 
-  // wifi_promiscuous_filter_t filter = {
-  // .filter_mask = WIFI_PROMIS_FILTER_MASK_MGMT}; // only MGMT frames
+  wifi_promiscuous_filter_t filter = {
+      .filter_mask = WIFI_PROMIS_FILTER_MASK_MGMT}; // only MGMT frames
   // .filter_mask = WIFI_PROMIS_FILTER_MASK_ALL}; // we use all frames
 
-  wifi_promiscuous_filter_t filter = {.filter_mask =
-                                          WIFI_PROMIS_FILTER_MASK_MGMT |
-                                          WIFI_PROMIS_FILTER_MASK_DATA};
+  // wifi_promiscuous_filter_t filter = {.filter_mask =
+  //                                        WIFI_PROMIS_FILTER_MASK_MGMT |
+  //                                        WIFI_PROMIS_FILTER_MASK_DATA};
 
   ESP_ERROR_CHECK(esp_wifi_init(&wificfg)); // configure Wifi with cfg
   ESP_ERROR_CHECK(