46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
#include "util.h"
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namespace config {
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const char *ntp_server = NTP_SERVER;
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const long utc_offset_in_seconds = UTC_OFFSET_IN_SECONDS; // UTC+1
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}
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// Get last 3 bytes of ESP MAC (worldwide unique)
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String macToID() {
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uint8_t mac[6];
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WiFi.macAddress(mac);
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String result;
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for (int i = 3; i < 6; i++) {
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if (mac[i] < 16)
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result += '0';
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result += String(mac[i], HEX);
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}
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result.toLowerCase();
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return result;
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}
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//NOTE: ESP32 sometimes couldn't access the NTP server, and every loop would take +1000ms
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// ifdefs could be used to define functions specific to ESP32, e.g. with configTime
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namespace ntp {
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WiFiUDP ntpUDP;
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NTPClient timeClient(ntpUDP, config::ntp_server, config::utc_offset_in_seconds, 60000UL);
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void initialize() {
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timeClient.begin();
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}
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void update() {
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timeClient.update();
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}
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String getLocalTime() {
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return timeClient.getFormattedDate();
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}
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}
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uint32_t max_loop_duration = 0;
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//FIXME: Remove every instance of Strings, to avoid heap fragmentation problems. (Start: "Free heap space : 17104 bytes")
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// See more https://cpp4arduino.com/2020/02/07/how-to-format-strings-without-the-string-class.html
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const String SENSOR_ID = "ESP" + macToID();
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