Merge pull request #666 from cyberman54/development

v2.0.3

README.md

@@ -175,7 +175,7 @@ by pressing the button of the device.
 
 # Sensors and Peripherals
 
-You can add up to 3 user defined sensors. Insert sensor's payload scheme in [*sensor.cpp*](src/sensor.cpp). Bosch BMP180 / BME280 / BME680 environment sensors are supported. Enable flag *lib_deps_sensors* for your board in `platformio.ini` and configure BME in board's hal file before build. If you need Bosch's proprietary BSEC libraray (e.g. to get indoor air quality value from BME680) further enable *build_flags_sensors*, which comes on the price of reduced RAM and increased build size. Furthermore, SDS011, RTC DS3231, generic serial NMEA GPS, I2C LoPy GPS are supported, and to be configured in board's hal file. See [*generic.h*](src/hal/generic.h) for all options and for proper configuration of BME280/BME680.
+You can add up to 3 user defined sensors. Insert your sensor's payload scheme in [*sensor.cpp*](src/sensor.cpp). Bosch BMP180 / BME280 / BME680 environment sensors are supported, to activate configure BME in board's hal file before build. If you need Bosch's proprietary BSEC libraray (e.g. to get indoor air quality value from BME680) further enable *build_flags_sensors*, which comes on the price of reduced RAM and increased build size. Furthermore, SDS011, RTC DS3231, generic serial NMEA GPS, I2C LoPy GPS are supported, and to be configured in board's hal file. See [*generic.h*](src/hal/generic.h) for all options and for proper configuration of BME280/BME680.
 
 Output of user sensor data can be switched by user remote control command 0x14 sent to Port 2. 
 

include/display.h

@@ -24,7 +24,7 @@
 #else
 #define OLED_ADDR -1
 #endif
-#ifndef USW_HW_I2C
+#ifndef USE_HW_I2C
 #define USE_HW_I2C 1
 #endif
 #ifndef OLED_FREQUENCY

include/globals.h

@@ -1,5 +1,6 @@
 #ifndef _GLOBALS_H
 #define _GLOBALS_H
+#endif
 
 // The mother of all embedded development...
 #include <Arduino.h>
@@ -49,6 +50,16 @@
   (xSemaphoreTake(I2Caccess, pdMS_TO_TICKS(DISPLAYREFRESH_MS)) == pdTRUE)
 #define I2C_MUTEX_UNLOCK() (xSemaphoreGive(I2Caccess))
 
+// pseudo system halt function, useful to prevent writeloops to NVRAM
+#ifndef _ASSERT
+#define _ASSERT(cond)                                                          \
+  if ((cond) == 0) {                                                           \
+    ESP_LOGE(TAG, "FAILURE in %s:%d", __FILE__, __LINE__);                     \
+    mask_user_IRQ();                                                           \
+    for (;;)                                                                   \
+      ;                                                                        \
+  }
+
 enum sendprio_t { prio_low, prio_normal, prio_high };
 enum timesource_t { _gps, _rtc, _lora, _unsynced };
 

include/i2c.h

@@ -2,6 +2,7 @@
 #define _I2C_H
 
 #include <Arduino.h>
+#include <BitBang_I2C.h>
 
 #define SSD1306_PRIMARY_ADDRESS (0x3D)
 #define SSD1306_SECONDARY_ADDRESS (0x3C)
@@ -22,7 +23,7 @@
 
 void i2c_init(void);
 void i2c_deinit(void);
-int i2c_scan(void);
+void i2c_scan(void);
 uint8_t i2c_readBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
 uint8_t i2c_writeBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
 

include/main.h

@@ -21,4 +21,4 @@
 #include "timekeeper.h"
 #include "corona.h"
 
-#endif
+#endif

include/sdcard.h

@@ -35,6 +35,25 @@
 #define SDCARD_SCLK SCK
 #endif
 
+// Default config for SDMMC_HOST_DEFAULT (4-bit bus width, slot 1)
+// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/sdmmc_host.html
+
+#ifndef SDCARD_DATA0
+#define SDCARD_DATA0 2
+#endif
+
+#ifndef SDCARD_DATA1
+#define SDCARD_DATA1 4
+#endif
+
+#ifndef SDCARD_DATA2
+#define SDCARD_DATA2 12
+#endif
+
+#ifndef SDCARD_DATA3
+#define SDCARD_DATA3 13
+#endif
+
 #define SDCARD_FILE_NAME "/paxcount.%02d"
 #define SDCARD_FILE_HEADER "date, time, wifi, bluet"
 

platformio_orig.ini

@@ -46,7 +46,7 @@ description = Paxcounter is a device for metering passenger flows in realtime. I
 
 [common]
 ; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
-release_version = 2.0.2
+release_version = 2.0.3
 ; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
 ; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
 debug_level = 3
@@ -61,7 +61,8 @@ display_library = ; set by build.py and taken from hal file
 lib_deps_lora =
     mcci-catena/MCCI LoRaWAN LMIC library @ ^3.2.0
 lib_deps_display =
-    bitbank2/OneBitDisplay @ 1.7.2
+    bitbank2/OneBitDisplay @ 1.9.0
+    bitbank2/BitBang_I2C @ ^2.1.3
     ricmoo/QRCode @ ^0.0.1
     bodmer/TFT_eSPI @ ^2.2.20
 lib_deps_ledmatrix =

src/bmesensor.cpp

@@ -46,7 +46,7 @@ Adafruit_BMP085 bmp; // I2C
 
 void setBMEIRQ() { xTaskNotify(irqHandlerTask, BME_IRQ, eSetBits); }
 
-// initialize BME680 sensor
+// initialize MEMS sensor
 int bme_init(void) {
 
   // return = 0 -> error / return = 1 -> success

src/display.cpp

@@ -67,7 +67,7 @@ void dp_setup(int contrast) {
                       MY_DISPLAY_INVERT, USE_HW_I2C, MY_DISPLAY_SDA,
                       MY_DISPLAY_SCL, MY_DISPLAY_RST,
                       OLED_FREQUENCY); // use standard I2C bus at 400Khz
-  assert(rc != OLED_NOT_FOUND);
+  _ASSERT (rc != OLED_NOT_FOUND);
 
   // set display buffer
   obdSetBackBuffer(&ssoled, displaybuf);
@@ -265,10 +265,10 @@ void dp_drawPage(time_t t, bool nextpage) {
     else
       dp_printf("WIFI:off");
     if (cfg.blescan)
-        if (!cfg.enscount)
+      if (!cfg.enscount)
-            dp_printf("BLTH:%-5d", macs_ble);
+        dp_printf("BLTH:%-5d", macs_ble);
-        else
+      else
-      dp_printf(" CWA:%-5d", cwa_report());
+        dp_printf(" CWA:%-5d", cwa_report());
     else
       dp_printf(" BLTH:off");
 #elif ((WIFICOUNTER) && (!BLECOUNTER))
@@ -279,10 +279,9 @@ void dp_drawPage(time_t t, bool nextpage) {
 #elif ((!WIFICOUNTER) && (BLECOUNTER))
     if (cfg.blescan) {
       dp_printf("BLTH:%-5d", macs_ble);
-        if (cfg.enscount)
+      if (cfg.enscount)
-            dp_printf("(CWA:%d)", cwa_report());
+        dp_printf("(CWA:%d)", cwa_report());
-    } 
+    } else
-    else
       dp_printf("BLTH:off");
 #else
     dp_printf("Sniffer disabled");

src/gpsread.cpp

@@ -150,7 +150,7 @@ time_t get_gpstime(void) {
 // GPS serial feed FreeRTos Task
 void gps_loop(void *pvParameters) {
 
-  configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
+  _ASSERT((uint32_t)pvParameters == 1); // FreeRTOS check
 
   while (1) {
 

src/hal/ttgov21new.h

@@ -16,7 +16,7 @@
 #define CFG_sx1276_radio 1 // HPD13A LoRa SoC
 
 // enable only if you want to store a local paxcount table on the device
-#define HAS_SDCARD  1      // this board has an SD-card-reader/writer
+#define HAS_SDCARD  2      // // this board has a SDMMC card-reader/writer
 
 #define HAS_DISPLAY 1
 #define HAS_LED (25) // green on board LED

src/i2c.cpp

@@ -5,7 +5,7 @@
 // Local logging tag
 static const char TAG[] = __FILE__;
 
-void i2c_init(void) { Wire.begin(MY_DISPLAY_SDA, MY_DISPLAY_SCL, 400000); }
+void i2c_init(void) { Wire.begin(MY_DISPLAY_SDA, MY_DISPLAY_SCL, 100000); }
 
 void i2c_deinit(void) {
   Wire.~TwoWire(); // shutdown/power off I2C hardware
@@ -14,73 +14,75 @@ void i2c_deinit(void) {
   pinMode(MY_DISPLAY_SCL, INPUT);
 }
 
-int i2c_scan(void) {
+void i2c_scan(void) {
 
-  int i2c_ret, addr;
+  // parts of the code in this function were taken from:
-  int devices = 0;
+  //
+  // Copyright (c) 2019 BitBank Software, Inc.
+  // Written by Larry Bank
+  // email: bitbank@pobox.com
+  // Project started 25/02/2019
+  //
+  // This program is free software: you can redistribute it and/or modify
+  // it under the terms of the GNU General Public License as published by
+  // the Free Software Foundation, either version 3 of the License, or
+  // (at your option) any later version.
+  //
+  // This program is distributed in the hope that it will be useful,
+  // but WITHOUT ANY WARRANTY; without even the implied warranty of
+  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  // GNU General Public License for more details.
+  //
+  // You should have received a copy of the GNU General Public License
+  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+  BBI2C bbi2c;
+
+  const char *szNames[]  = {"Unknown","SSD1306","SH1106","VL53L0X","BMP180", "BMP280","BME280",
+                "MPU-60x0", "MPU-9250", "MCP9808","LSM6DS3", "ADXL345", "ADS1115","MAX44009",
+                "MAG3110", "CCS811", "HTS221", "LPS25H", "LSM9DS1","LM8330", "DS3231", "LIS3DH",
+                "LIS3DSH","INA219","SHT3X","HDC1080","MPU6886","BME680", "AXP202", "AXP192", "24AA02XEXX", "DS1307"};
 
   ESP_LOGI(TAG, "Starting I2C bus scan...");
 
   // block i2c bus access
   if (I2C_MUTEX_LOCK()) {
 
-    // Scan at 100KHz low speed
+    memset(&bbi2c, 0, sizeof(bbi2c));
-    Wire.setClock(100000);
+    bbi2c.bWire = 1; // use wire library, no bitbanging
+    bbi2c.iSDA = MY_DISPLAY_SDA;
+    bbi2c.iSCL = MY_DISPLAY_SCL;
+    I2CInit(&bbi2c, 100000L); // Scan at 100KHz low speed
+    delay(100);               // allow devices to power up
 
-    for (addr = 8; addr <= 119; addr++) {
+    uint8_t map[16];
+    uint8_t i;
+    int iDevice, iCount;
 
-      Wire.beginTransmission(addr);
+    I2CScan(&bbi2c, map); // get bitmap of connected I2C devices
-      Wire.write(addr);
+    if (map[0] == 0xfe)   // something is wrong with the I2C bus
-      i2c_ret = Wire.endTransmission();
+    {
-
+      ESP_LOGI(TAG, "I2C pins are not correct or the bus is being pulled low "
-      if (i2c_ret == 0) {
+                    "by a bad device; unable to run scan");
-        devices++;
+    } else {
-
+      iCount = 0;
-        switch (addr) {
+      for (i = 1; i < 128; i++) // skip address 0 (general call address) since
-
+                                // more than 1 device can respond
-        case SSD1306_PRIMARY_ADDRESS:
+      {
-        case SSD1306_SECONDARY_ADDRESS:
+        if (map[i >> 3] & (1 << (i & 7))) // device found
-          ESP_LOGI(TAG, "0x%X: SSD1306 Display controller", addr);
+        {
-          break;
+          iCount++;
-
+          iDevice = I2CDiscoverDevice(&bbi2c, i);
-        case BME_PRIMARY_ADDRESS:
+          ESP_LOGI(TAG, "Device found at 0x%X, type = %s", i,
-        case BME_SECONDARY_ADDRESS:
+                   szNames[iDevice]); // show the device name as a string
-          ESP_LOGI(TAG, "0x%X: Bosch BME MEMS", addr);
-          break;
-
-        case AXP192_PRIMARY_ADDRESS:
-          ESP_LOGI(TAG, "0x%X: AXP192 power management", addr);
-          break;
-
-        case IP5306_PRIMARY_ADDRESS:
-          ESP_LOGI(TAG, "0x%X: IP5306 power management", addr);
-          break;
-
-        case QUECTEL_GPS_PRIMARY_ADDRESS:
-          ESP_LOGI(TAG, "0x%X: Quectel GPS", addr);
-          break;
-
-        case MCP_24AA02E64_PRIMARY_ADDRESS:
-          ESP_LOGI(TAG, "0x%X: 24AA02E64 serial EEPROM", addr);
-          break;
-
-        default:
-          ESP_LOGI(TAG, "0x%X: Unknown device", addr);
-          break;
         }
-      } // switch
+      } // for i
-    }   // for loop
+      ESP_LOGI(TAG, "%u I2C device(s) found", iCount);
-
+    }
-    ESP_LOGI(TAG, "I2C scan done, %u devices found.", devices);
-
-    // Set back to 400KHz
-    Wire.setClock(400000);
 
     I2C_MUTEX_UNLOCK(); // release i2c bus access
   } else
-    ESP_LOGE(TAG, "I2c bus busy - scan error");
+    ESP_LOGE(TAG, "I2C bus busy - scan error");
-
-  return devices;
 }
 
 // mutexed functions for i2c r/w access

src/irqhandler.cpp

@@ -6,7 +6,7 @@ static const char TAG[] = __FILE__;
 // irq handler task, handles all our application level interrupts
 void irqHandler(void *pvParameters) {
 
-  configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
+  _ASSERT((uint32_t)pvParameters == 1); // FreeRTOS check
 
   uint32_t InterruptStatus;
 

src/lmic_config.h

@@ -22,9 +22,8 @@
 #define LMIC_USE_INTERRUPTS 1
 #endif
 
-// avoid lmic warning if we don't configure radio because we don't have one
+// avoid lmic warning if we don't configure radio in case we haven't one
-#define CFG_sx1276_radio 1
+#if !(defined(CFG_sx1272_radio) || defined(CFG_sx1276_radio))
-#if ! (defined(CFG_sx1272_radio) || defined(CFG_sx1276_radio))
 #define CFG_sx1276_radio 1
 #endif
 

src/lorawan.cpp

@@ -227,7 +227,7 @@ void showLoraKeys(void) {
 
 // LMIC send task
 void lora_send(void *pvParameters) {
-  configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
+  _ASSERT((uint32_t)pvParameters == 1); // FreeRTOS check
 
   MessageBuffer_t SendBuffer;
 
@@ -292,7 +292,7 @@ void lora_stack_reset() {
 }
 
 esp_err_t lora_stack_init(bool do_join) {
-  assert(SEND_QUEUE_SIZE);
+  _ASSERT(SEND_QUEUE_SIZE > 0);
   LoraSendQueue = xQueueCreate(SEND_QUEUE_SIZE, sizeof(MessageBuffer_t));
   if (LoraSendQueue == 0) {
     ESP_LOGE(TAG, "Could not create LORA send queue. Aborting.");
@@ -382,7 +382,7 @@ void lora_queuereset(void) { xQueueReset(LoraSendQueue); }
 
 // LMIC lorawan stack task
 void lmictask(void *pvParameters) {
-  configASSERT(((uint32_t)pvParameters) == 1);
+  _ASSERT((uint32_t)pvParameters == 1);
 
   // setup LMIC stack
   os_init_ex(&myPinmap); // initialize lmic run-time environment

src/main.cpp

@@ -65,8 +65,8 @@ PMUIRQ          -> PMU chip gpio
 fired by software (Ticker.h)
 TIMESYNC_IRQ    -> setTimeSyncIRQ()
 CYCLIC_IRQ      -> setCyclicIRQ()
-SENDCYCLE_IRQ   -> setSendIRQ()  
+SENDCYCLE_IRQ   -> setSendIRQ()
-BME_IRQ         -> setBMEIRQ()     
+BME_IRQ         -> setBMEIRQ()
 MQTT_IRQ        -> setMqttIRQ()
 
 ClockTask (Core 1), see timekeeper.cpp
@@ -118,7 +118,7 @@ void setup() {
 
   // create some semaphores for syncing / mutexing tasks
   I2Caccess = xSemaphoreCreateMutex(); // for access management of i2c bus
-  assert(I2Caccess != NULL);
+  _ASSERT(I2Caccess != NULL);
   I2C_MUTEX_UNLOCK();
 
   // disable brownout detection
@@ -203,7 +203,7 @@ void setup() {
 #endif
 
   // read (and initialize on first run) runtime settings from NVRAM
-  assert(loadConfig()); // includes initialize if necessary
+  _ASSERT(loadConfig()); // includes initialize if necessary
 
   // now that we are powered, we scan i2c bus for devices
   i2c_scan();
@@ -217,7 +217,7 @@ void setup() {
 #endif
 
 #ifdef BOARD_HAS_PSRAM
-  assert(psramFound());
+  _ASSERT(psramFound());
   ESP_LOGI(TAG, "PSRAM found and initialized");
   strcat_P(features, " PSRAM");
 #endif
@@ -343,20 +343,20 @@ void setup() {
 #if (HAS_LORA)
   strcat_P(features, " LORA");
   // kick off join, except we come from sleep
-  assert(lora_stack_init(RTC_runmode == RUNMODE_WAKEUP ? false : true) ==
+  _ASSERT(lora_stack_init(RTC_runmode == RUNMODE_WAKEUP ? false : true) ==
          ESP_OK);
 #endif
 
 // initialize SPI
 #ifdef HAS_SPI
   strcat_P(features, " SPI");
-  assert(spi_init() == ESP_OK);
+  _ASSERT(spi_init() == ESP_OK);
 #endif
 
 // initialize MQTT
 #ifdef HAS_MQTT
   strcat_P(features, " MQTT");
-  assert(mqtt_init() == ESP_OK);
+  _ASSERT(mqtt_init() == ESP_OK);
 #endif
 
 #if (HAS_SDCARD)
@@ -395,7 +395,7 @@ void setup() {
 // initialize RTC
 #ifdef HAS_RTC
   strcat_P(features, " RTC");
-  assert(rtc_init());
+  _ASSERT(rtc_init());
 #endif
 
 #if defined HAS_DCF77
@@ -446,11 +446,13 @@ void setup() {
   strcat_P(features, " BMP180");
 #endif
   if (bme_init())
-    ESP_LOGI(TAG, "Starting BME sensor...");
+    ESP_LOGI(TAG, "BME sensor initialized");
+  else
+    ESP_LOGE(TAG, "BME sensor could not be initialized");
 #endif
 
   // starting timers and interrupts
-  assert(irqHandlerTask != NULL); // has interrupt handler task started?
+  _ASSERT(irqHandlerTask != NULL); // has interrupt handler task started?
   ESP_LOGI(TAG, "Starting Timers...");
 
 // display interrupt
@@ -505,7 +507,7 @@ void setup() {
 #endif
 
   ESP_LOGI(TAG, "Starting Timekeeper...");
-  assert(timepulse_init()); // setup pps timepulse
+  _ASSERT(timepulse_init()); // setup pps timepulse
   timepulse_start();        // starts pps and cyclic time sync
 
 #endif // TIME_SYNC_INTERVAL
@@ -520,4 +522,4 @@ void setup() {
 
 } // setup()
 
-void loop() { vTaskDelete(NULL); }
+void loop() { vTaskDelete(NULL); }

src/mqttclient.cpp

@@ -23,7 +23,7 @@ esp_err_t mqtt_init(void) {
   mqttClient.begin(MQTT_SERVER, MQTT_PORT, netClient);
   mqttClient.onMessageAdvanced(mqtt_callback);
 
-  assert(SEND_QUEUE_SIZE);
+  _ASSERT(SEND_QUEUE_SIZE > 0);
   MQTTSendQueue = xQueueCreate(SEND_QUEUE_SIZE, sizeof(MessageBuffer_t));
   if (MQTTSendQueue == 0) {
     ESP_LOGE(TAG, "Could not create MQTT send queue. Aborting.");

src/sdcard.cpp

@@ -22,11 +22,12 @@ bool sdcard_init() {
 
 #if HAS_SDCARD == 1 // use SD SPI host driver
   useSDCard = SD.begin(SDCARD_CS, SDCARD_MOSI, SDCARD_MISO, SDCARD_SCLK);
-  //SPI.begin(SDCARD_SCLK, SDCARD_MSO, SDCARD_MOSI, SDCARD_CS);
-  //delay(10);
-  //useSDCard = SD.begin(SDCARD_CS, SPI, 40000000, "/sd");
-
 #elif HAS_SDCARD == 2 // use SD MMC host driver
+  // enable internal pullups of sd-data lines
+  gpio_set_pull_mode(gpio_num_t(SDCARD_DATA0), GPIO_PULLUP_ONLY);
+  gpio_set_pull_mode(gpio_num_t(SDCARD_DATA1), GPIO_PULLUP_ONLY);
+  gpio_set_pull_mode(gpio_num_t(SDCARD_DATA2), GPIO_PULLUP_ONLY);
+  gpio_set_pull_mode(gpio_num_t(SDCARD_DATA3), GPIO_PULLUP_ONLY);
   useSDCard = SD_MMC.begin();
 #endif
 
@@ -38,7 +39,8 @@ bool sdcard_init() {
   return useSDCard;
 }
 
-void sdcardWriteData(uint16_t noWifi, uint16_t noBle, __attribute__((unused)) uint16_t noBleCWA) {
+void sdcardWriteData(uint16_t noWifi, uint16_t noBle,
+                     __attribute__((unused)) uint16_t noBleCWA) {
   static int counterWrites = 0;
   char tempBuffer[12 + 1];
   time_t t = now();
@@ -103,7 +105,7 @@ void createFile(void) {
         ESP_LOGD(TAG, "SD: name opened: <%s>", bufferFilename);
         fileSDCard.print(SDCARD_FILE_HEADER);
 #if (COUNT_ENS)
-        fileSDCard.print(SDCARD_FILE_HEADER_CWA);             // for Corona-data (CWA)
+        fileSDCard.print(SDCARD_FILE_HEADER_CWA); // for Corona-data (CWA)
 #endif
 #if (HAS_SDS011)
         fileSDCard.print(SDCARD_FILE_HEADER_SDS011);

src/spislave.cpp

@@ -104,7 +104,7 @@ void spi_slave_task(void *param) {
 }
 
 esp_err_t spi_init() {
-  assert(SEND_QUEUE_SIZE);
+  _ASSERT(SEND_QUEUE_SIZE > 0);
   SPISendQueue = xQueueCreate(SEND_QUEUE_SIZE, sizeof(MessageBuffer_t));
   if (SPISendQueue == 0) {
     ESP_LOGE(TAG, "Could not create SPI send queue. Aborting.");

src/timekeeper.cpp

@@ -245,7 +245,7 @@ void clock_init(void) {
                           &ClockTask,           // task handle
                           1);                   // CPU core
 
-  assert(ClockTask); // has clock task started?
+  _ASSERT(ClockTask != NULL); // has clock task started?
 } // clock_init
 
 void clock_loop(void *taskparameter) { // ClockTask

src/wifiscan.cpp

@@ -45,7 +45,7 @@ IRAM_ATTR void wifi_sniffer_packet_handler(void *buff,
 
 // Software-timer driven Wifi channel rotation callback function
 void switchWifiChannel(TimerHandle_t xTimer) {
-  configASSERT(xTimer);
+  _ASSERT(xTimer != NULL);
   channel =
       (channel % WIFI_CHANNEL_MAX) + 1; // rotate channel 1..WIFI_CHANNEL_MAX
   esp_wifi_set_channel(channel, WIFI_SECOND_CHAN_NONE);
@@ -82,7 +82,7 @@ void wifi_sniffer_init(void) {
 }
 
 void switch_wifi_sniffer(uint8_t state) {
-  assert(WifiChanTimer);
+  _ASSERT(WifiChanTimer != NULL);
   if (state) {
     // switch wifi sniffer on
     ESP_ERROR_CHECK(esp_wifi_start());