Send Request Failed Set Array on Realtime Database

[ummulmth]

I want to store an array of sensor readings for one minute (of which there are about 1500 values) into a realtime database. But when the sensor reading is finished, the array cannot be stored to firebase with the error "Set Array.... Send Request Failed"

I'm using a XIAO ESP32C3 micro with a private wifi connection (hotspot). This is the code I made.

P.s. I tried to store analog values from analogRead pin d with a total of 1500 arrays that could be done, but when assembled with sensors it failed.

void sendArrayRTDB(){
int signal_len = sizeof(signalValues)/sizeof(signalValues[0]);

// if(sizeof(signalValues) > 500){
if (Firebase.ready() && (millis() - sendDataPrevMillis > 15000 || sendDataPrevMillis == 0))
{
sendDataPrevMillis = millis();
FirebaseJsonArray arr;

  for (int i = 0; i < signal_len; i++) {
    arr.add(signalValues[i]);
  }

  Serial.printf("Set array... %s\n", Firebase.RTDB.setArray(&fbdo, "/test/array", &arr) ? "ok" : fbdo.errorReason().c_str());

  Serial.printf("Get array... %s\n", Firebase.RTDB.getArray(&fbdo, "/test/array") ? fbdo.to<FirebaseJsonArray>().raw() : fbdo.errorReason().c_str());
}

// }
}

void storeValue(int value) {
signalValues[currentIndex] = value;
currentIndex = (currentIndex + 1) % ARRAY_SIZE;
}

void loop()
{
hr = particleSensor.getIR();
currentTime = millis();
if(hr > 50000){
if(!flag){
flag = true;
startTime = millis();
}
int duration = 10000;
if(currentTime - startTime >= duration) {

  duration = 60000 + duration;

  if(currentTime - startTime <= duration){
    Serial.print(hr); 
    float signal = hr;
    storeValue(signal);
    Serial.println(); 
  } else {
    sendArrayRTDB();
    // delay(5000);
    // getdata();
  }
}

} else {
flag = false;
}
}

The error message

[mobizt]

I recommend you follow the examples e.g. this basic example to see what required in setup and loop.

[ummulmth]

Will a bad sensor cable or usb cable affect RTDB data transmission?

[mobizt]

It's not related to cables.

At least it requires that, Firebase.ready() should be executed repeatedly in loop as it manages all necessary task e.g., network reconnection and authentication.

In your case, the internet connection can be the issue.

I just test storing 1500 arrays of float value at once with setArray without problem.

[ummulmth]

i have called firebase.ready() in the loop, but still "send request Failed". And I try multiple network but still same

void loop()
{
hr = particleSensor.getIR();
currentTime = millis();
if (Firebase.ready()){
if(hr > 50000){
if(!flag){
flag = true;
startTime = millis();
}
int duration = 10000;
if(currentTime - startTime >= duration) {

    duration = 60000 + duration;

    if(currentTime - startTime <= duration){
      Serial.print(hr); 
      float signal = hr;
      storeValue(signal);
      Serial.println(); 
    } else {
      sendArrayRTDB();
      // delay(5000);
      // getdata();
    }
  }
} else {
  flag = false;
}

}
}

[mobizt]

I don't know what happens in your case I already test it and it works fine.

[mobizt]

The error is about network problem included unstable internet or weak signal.

[mobizt]

You should set the debug level in Arduino IDE.

If you see this message, your device memory is not enough for SSL client to work which required minimum free heap at least 100k.

[ 18385][E][ssl_client.cpp:37] _handle_error(): [start_ssl_client():264]: (-32512) SSL - Memory allocation failed
[ 18386][E][WiFiClientSecure.cpp:144] connect(): start_ssl_client: -32512

Storing too deep or large amount of data in FirebaseJson and FirebaseJsonArray is not recommend because it requires huge memory as it stored each key/value as object instead of string.

You should design your data structure to work with low memory environment in embedded device.