channel hopping switch on/off option

README.md

@@ -303,7 +303,7 @@ Hereafter described is the default *plain* format, which uses MSB bit numbering.
 	byte 6:		Counter mode (0=cyclic unconfirmed, 1=cumulative, 2=cyclic confirmed) [default 0]
 	bytes 7-8:	RSSI limiter threshold value (negative) [default 0]
 	byte 9:		Lora Payload send cycle in seconds/2 (0..255) [default 120]
-	byte 10:	Wifi channel switch interval in seconds/100 (0..255) [default 50]
+	byte 10:	Wifi channel hopping interval in seconds/100 (0..255), 0 means no hopping [default 50]
 	byte 11:	Bluetooth channel switch interval in seconds/100 (0..255) [efault 10]
 	byte 12:	Bluetooth scanner status (1=on, 0=0ff) [default 1]
 	byte 13:	Wifi antenna switch (0=internal, 1=external) [default 0]
@@ -437,10 +437,11 @@ Send for example `8386` as Downlink on Port 2 to get battery status and time/dat
 	0 ... 255 payload send cycle in seconds/2
 	e.g. 120 -> payload is transmitted each 240 seconds [default]
 
-0x0B set Wifi channel switch interval timer
+0x0B set Wifi channel hopping interval timer
 
 	0 ... 255 duration for scanning a wifi channel in seconds/100
 	e.g. 50 -> each channel is scanned for 500 milliseconds [default]
+	0 means no hopping, scanning on  channel WIFI_CHANNEL_MIN only
 
 0x0C set Bluetooth channel switch interval timer
 

include/wifiscan.h

@@ -8,6 +8,8 @@
 #include "antenna.h" // code for switching wifi antennas
 #include "macsniff.h"
 
+extern TimerHandle_t WifiChanTimer;
+
 void wifi_sniffer_init(void);
 void switch_wifi_sniffer(uint8_t state);
 void IRAM_ATTR wifi_sniffer_packet_handler(void *buff,

src/main.cpp

@@ -88,7 +88,7 @@ triggers pps 1 sec impulse
 configData_t cfg; // struct holds current device configuration
 char lmic_event_msg[LMIC_EVENTMSG_LEN]; // display buffer for LMIC event message
 uint8_t batt_level = 0;                 // display value
-uint8_t volatile channel = 0;           // channel rotation counter
+uint8_t volatile channel = WIFI_CHANNEL_MIN;   // channel rotation counter
 uint8_t volatile rf_load = 0;                  // RF traffic indicator
 uint16_t volatile macs_wifi = 0, macs_ble = 0; // globals for display
 

src/rcommand.cpp

@@ -63,11 +63,20 @@ void set_sleepcycle(uint8_t val[]) {
 void set_wifichancycle(uint8_t val[]) {
   cfg.wifichancycle = val[0];
   // update Wifi channel rotation timer period
-  xTimerChangePeriod(WifiChanTimer, pdMS_TO_TICKS(cfg.wifichancycle * 10), 100);
+  if (cfg.wifichancycle > 0) {
-
+    if (xTimerIsTimerActive(WifiChanTimer) == pdFALSE)
+      xTimerStart(WifiChanTimer, (TickType_t) 0);
+    xTimerChangePeriod(WifiChanTimer, pdMS_TO_TICKS(cfg.wifichancycle * 10),
+                       100);
   ESP_LOGI(TAG,
-           "Remote command: set Wifi channel switch interval to %.1f seconds",
+           "Remote command: set Wifi channel hopping interval to %.1f seconds",
            cfg.wifichancycle / float(100));
+  } else {
+    xTimerStop(WifiChanTimer, (TickType_t) 0);
+    esp_wifi_set_channel(WIFI_CHANNEL_MIN, WIFI_SECOND_CHAN_NONE);
+    channel = WIFI_CHANNEL_MIN;
+    ESP_LOGI(TAG, "Remote command: set Wifi channel hopping to off");
+  }
 }
 
 void set_blescantime(uint8_t val[]) {
@@ -404,9 +413,9 @@ void rcommand(const uint8_t cmd[], const uint8_t cmdlength) {
           table[i].func(
               foundcmd); // execute assigned function with given parameters
         } else
-          ESP_LOGI(
+          ESP_LOGI(TAG,
-              TAG,
+                   "Remote command x%02X called with missing parameter(s), "
-              "Remote command x%02X called with missing parameter(s), skipped",
+                   "skipped",
                    table[i].opcode);
         break;   // command found -> exit table lookup loop
       }          // end of command validation

src/wifiscan.cpp

@@ -41,8 +41,6 @@ IRAM_ATTR void wifi_sniffer_packet_handler(void *buff,
 
 // Software-timer driven Wifi channel rotation callback function
 void switchWifiChannel(TimerHandle_t xTimer) {
-  // static uint8_t channel = 0; // channel rotation counter
-  _ASSERT(xTimer != NULL);
   channel =
       (channel % WIFI_CHANNEL_MAX) + 1; // rotate channel 1..WIFI_CHANNEL_MAX
   esp_wifi_set_channel(channel, WIFI_SECOND_CHAN_NONE);
@@ -74,20 +72,29 @@ void wifi_sniffer_init(void) {
 
   // setup wifi channel rotation timer
   WifiChanTimer =
-      xTimerCreate("WifiChannelTimer", pdMS_TO_TICKS(cfg.wifichancycle * 10),
+      xTimerCreate("WifiChannelTimer",
+                   (cfg.wifichancycle > 0) ? pdMS_TO_TICKS(cfg.wifichancycle)
+                                           : pdMS_TO_TICKS(50),
                    pdTRUE, (void *)0, switchWifiChannel);
+  if (cfg.wifichancycle > 0)
+    xTimerStart(WifiChanTimer, (TickType_t) 0);
+  else
+    esp_wifi_set_channel(WIFI_CHANNEL_MIN, WIFI_SECOND_CHAN_NONE);
 }
 
 void switch_wifi_sniffer(uint8_t state) {
-  _ASSERT(WifiChanTimer != NULL);
   if (state) {
     // switch wifi sniffer on
     ESP_ERROR_CHECK(esp_wifi_start());
-    xTimerStart(WifiChanTimer, 0);
+    if (cfg.wifichancycle > 0)
+      xTimerStart(WifiChanTimer, (TickType_t) 0);
+    else
+      esp_wifi_set_channel(WIFI_CHANNEL_MIN, WIFI_SECOND_CHAN_NONE);
     esp_wifi_set_promiscuous(true);
   } else {
     // switch wifi sniffer off
-    xTimerStop(WifiChanTimer, 0);
+    if (xTimerIsTimerActive(WifiChanTimer) != pdFALSE)
+      xTimerStop(WifiChanTimer, (TickType_t) 0);
     esp_wifi_set_promiscuous(false);
     ESP_ERROR_CHECK(esp_wifi_stop());
     macs_wifi = 0; // clear WIFI counter