sys: clean-up system-specific functions

- shrink utils source file, move heartbeat and boot management into system
- improvise with 'heartbeat' functionality. include scheduler implementation that will
manage the per-module heartbeat callbacks with individual 'mode' and
'interval' settings. current ones are mqtt (including relays, lights, thermostat), debug and
influxdb. preserve heartbeat NONE, ONCE and REPEAT, REPEAT_STATUS is effectively a hbReport & status bit.
- mqtt heartbeat is managed through mqttHeartbeat() callbacks
- tweak mqtt callbacks to use lists instead of the vector, slighly reducing the size of the .bin
- update WebUI, include report setting and update hbMode values
- make sure general.h settings include new heartbeat,
move constant definitions outside of the header
- correctly include dependencies through the .cpp, avoid leaking
internal details.
- as a side-effect, base headers are no longer included recursively

code/espurna/debug.cpp

@@ -17,8 +17,14 @@ Copyright (C) 2016-2019 by Xose Pérez <xose dot perez at gmail dot com>
 #include "settings.h"
 #include "telnet.h"
 #include "web.h"
+#include "ntp.h"
+#include "utils.h"
 #include "ws.h"
 
+#if DEBUG_WEB_SUPPORT
+#include <ArduinoJson.h>
+#endif
+
 #if DEBUG_UDP_SUPPORT
 #include <WiFiUdp.h>
 WiFiUDP _udp_debug;
@@ -367,6 +373,24 @@ void debugConfigureBoot() {
     debugConfigure();
 }
 
+bool _debugHeartbeat(heartbeat::Mask mask) {
+    if (mask & heartbeat::Report::Uptime)
+        DEBUG_MSG_P(PSTR("[MAIN] Uptime: %s\n"), getUptime().c_str());
+
+    if (mask & heartbeat::Report::Freeheap)
+        infoHeapStats();
+
+    if ((mask & heartbeat::Report::Vcc) && (ADC_MODE_VALUE == ADC_VCC))
+        DEBUG_MSG_P(PSTR("[MAIN] Power: %lu mV\n"), ESP.getVcc());
+
+#if NTP_SUPPORT
+    if ((mask & heartbeat::Report::Datetime) && (ntpSynced()))
+        DEBUG_MSG_P(PSTR("[MAIN] Time: %s\n"), ntpDateTime().c_str());
+#endif
+
+    return true;
+}
+
 void debugConfigure() {
 
     // HardwareSerial::begin() will automatically enable this when
@@ -408,6 +432,10 @@ void debugConfigure() {
     }
     #endif // DEBUG_LOG_BUFFER
 
+    systemHeartbeat(_debugHeartbeat,
+        getSetting("dbgHbMode", heartbeat::currentMode()),
+        getSetting("dbgHbIntvl", heartbeat::currentInterval()));
+
 }
 
 #endif // DEBUG_SUPPORT