Features

Installing

Getting started

Required includes

#include<SPIFFSLogger.h>

The SPIFFSLogData<T> struct

template<classT>structSPIFFSLogData{time_t timestampUTC;/** creation time in UTC*/    T data;/** data of type T*/};

The SPIFFSLogger<T> class

// store ints, saving files in /log/ and keeping today + 7 days of historySPIFFSLogger<int>logger("/log",7);

structEnvData {float temperature;float humidity;uint16_t pressure;};SPIFFSLogger<EnvData>logger("/log",7);

Initializing the logger

voidsetup() {// configure time however you like, we use NTP herewifiSetup();// ommitted for brevityconfigTime(0,0,"pool.ntp.org");// initialize SPIFFS    SPIFFS.begin();// initialize our logger    logger.init();}

Running required operations

voidloop() {// your code is here    logger.process();}

Writing data

structEnvData data = {23.54,50.67,1020 };logger.write(data);

Reading data

SPIFFSLogData<EnvData> data;logger.readRows(&data, time(nullptr),0,1);Serial.printf("TS: %d, T: %.2f, H: %.2f, %u\n",              data.timestampUTC,              data.data.temperature,              data.data.humidity,              data.data.pressure);

consttime_t now = time(nullptr);constsize_t rowCount = logger.rowCount(now);logger.readRows(&data, now, rowCount -1,1);

SPIFFSLogData<EnvData> data[25];logger.readRows(data, time(nullptr),49,25);

Filtering data

SPIFFSLogData<EnvData> data[25];size_t count = logger.readRowsBetween(                       &data,// output                       now - (60 *20),// time start (inclusive)                       now,// time end (inclusive)0,// start index within results25// max number of rows to fetch);for (int i=0; i<count; i++) {    Serial.printf("TS: %d, T: %.2f, H: %.2f, %u\n",                  data[i].timestampUTC,                  data[i].data.temperature,                  data[i].data.humidity,                  data[i].data.pressure);}

License