Blynk.syncVirtual not working on esp32 BLE

Need Help With My Project
1

I am using a esp32 in BLE mode and making a outboard fuel -meter. On start up I call Blynk.syncVirtual(V3) to get the total fuel consumption followed by a corresponding BLYNK_WRITE(V3) but this function never gets called!? I have tried syncAll() as well but none of my BLYNK_WRITE gets called.

It works with my esp8266 but not esp32 in BLE mode!?


#define BLYNK_PRINT Serial

#define BLYNK_USE_DIRECT_CONNECT

#include <BlynkSimpleEsp32_BLE.h>
#include <BLEDevice.h>
#include <BLEServer.h>

BlynkTimer timer1;

volatile double trip_volume = 0.0;
volatile double n_pulse = 0.0;
volatile double total_consumption = 1.0;   %%UPDATE THIS AT BOOT
int Signal_Pin = 13;
volatile double Flow = 0.0;
float dt = 1.0;
float v_disp = 0.17; // mL per pulse
float F_pulse = 98.0;  //98pulse per sek = 1L/min
float speed_kmt;
float speed_knots;
float speed_mps;
float Flow_lpkm;
bool going_to_sleep = false;
bool syncedonboot = false;
int noConnect = 0;
int update_timer;
int boot_timer;
int units;
float speed_units;
float conv = 1.944;


// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxx";

void setup()
{
  attachInterrupt(digitalPinToInterrupt(Signal_Pin),pulse, RISING);

  Serial.begin(9600);

  Serial.println("Waiting for connections...");

  Blynk.setDeviceName("Blynk");

  Blynk.begin(auth);
  
  delay(200);
}

BLYNK_CONNECTED() 
{
Serial.println("connected and syncing");  
Blynk.syncVirtual(V3);  %% <----------- HERE I TRY TO GET THE LATEST CLOUD DATA
delay(500);
}

BLYNK_APP_DISCONNECTED() {
timer1.disable(update_timer);
Serial.println("app diconnected");
}

BLYNK_WRITE(V3)  <----------------- THIS NEVER GETS CALLED
{
  Serial.println("synced at boot");
  delay(50);
  total_consumption = param.asFloat(); // get the latest fuel consuption from server
  syncedonboot = true;
  update_timer = timer1.setInterval(1000L*dt, update_values);
} 

BLYNK_WRITE(V5)
{
  units = param.asInt(); // Swith between units
  delay(20);
} 

BLYNK_WRITE(V8)
{
  dt = param.asInt(); // Swith between units
  delay(20);
  Serial.print("dt is now");
  Serial.println(dt);
} 

void update_values()
{
  Flow = n_pulse / F_pulse * 1 / dt; // in [L/min]
  speed_kmt = speed_knots/0.54; //mps to kmt
  Flow_lpkm = Flow * 60.0 / (speed_kmt); // in ??? 

  if (units == 0){
  speed_units = speed_knots;
  }
  else{
  speed_units = speed_kmt;
  }

  Blynk.virtualWrite(V0, Flow);
  delay(20);
  Blynk.virtualWrite(V1, trip_volume);
  delay(20);
  Blynk.virtualWrite(V3, total_consumption);
  delay(20);
  Blynk.virtualWrite(V2, Flow_lpkm);
  delay(20);
  Blynk.virtualWrite(V6, speed_units);

  Serial.println("updating values");
  Serial.println(Flow);
  Serial.println(trip_volume);
  n_pulse = 0;
}

BLYNK_WRITE(V7)
{
   Serial.println("speed is synced");
   speed_knots = param[3].asFloat()*conv;
}

BLYNK_WRITE(V4)
{
  trip_volume = 0.0;
  Blynk.virtualWrite(V1, 0.0);
}

void pulse()   //measure the quantity of square wave
{
  trip_volume += 1.0 / 5880.0;  // in Liters
  total_consumption += 1.0 / 5880.0;  // in Liters
  n_pulse += 1.0;
}



void loop()
{
  Blynk.run();
  timer1.run();
}
2

I think it’s one of those commands that does t work with Bluetooth…

Pete.

2 Likes