Date and time with ms precision

Projects Programming
1

Hi all!

I am working on monitoring the electric conssumption of a machine. I do it with Circuit Setup SSP Energy Meter (which includes an ESP32 and an ATM90E32) sampling every 50ms. I am sending data via MQTT to a Raspberry Pi, and storing it for further analysis, for what I am using a Python script and SQLite.

Now I'm working with other (possibly faster) communication alternatives such as the Serial port, SPI or probably I2C.

My question is: Is there any way of sending data through (for example the Serial port which I think is the easiest to start with) in a format like this?:

day / month / year - / hour / minute / second / milisecond

I can do it in the Python script but I think it would be more accurate to keep the time of the measurement and not the time of data storage. The code fragment for the Serial port is this one:

#define ESP32

#include <ArduinoJson.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>
#include <SPI.h> 
#include <ATM90E32.h>

  Serial.println("Voltage 1: " + String(voltageA) + "V");
  Serial.println("Current 1: " + String(currentCT1) + "A");
  Serial.println("Current 2: " + String(currentCT2) + "A");
  Serial.println("Active Power: " + String(realPower) + "W");
  Serial.println("Power Factor: " + String(powerFactor));
  Serial.println("Harmonic Power: " + String(eic.GetTotalActiveHarPower()) + "W");
  Serial.println("Reactive Power: " + String(eic.GetTotalReactivePower()) + "var");
  Serial.println("Apparent Power: " + String(eic.GetTotalApparentPower()) + "VA");
  Serial.println("Phase Angle A: " + String(eic.GetPhaseA()));
  Serial.println("Chip Temp: " + String(temp) + "C");
  Serial.println("Frequency: " + String(freq) + "Hz");

I can provide the full code if needed, but I don't think it's necessary.

Thanks for your time and help.

2

do you have a way to sync your clock to the "real" ms?

3

If you have the data then why not

If you are using an ESP32 you can use Serial.prinft() to format the output string, lowercase s, not a String, uppercase S