From 16112830159e840d5dffa19f55ecbe931482bc8a Mon Sep 17 00:00:00 2001
From: Hendrik Langer <hendrik+dev@xd0.de>
Date: Mon, 18 Jun 2018 10:00:47 +0200
Subject: [PATCH] fix millis()

---
 src/main.cpp | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 973bb3a..f796cbd 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -370,6 +370,16 @@ void ICACHE_FLASH_ATTR sendValues() {
   delay(1); // yield();
 }
 
+// WARNING: SOME TIME THE CALIBRATION VALUE CHANGES AND IT WILL RETURN A LOWER VALUE THAN BEFORE, BREAKING INTERVAL CHECKS!!!
+unsigned long getTime() {
+  uint64_t rtc_t = system_get_rtc_time();
+  uint32_t cal = system_rtc_clock_cali_proc();
+//  uint32_t timemicrosec = rtc_t*((uint64) ((cal * 1000) >> 12));
+//  Serial.printf("cal: %d.%d \r\n", ((cal*1000)>>12)/1000, ((cal*1000)>>12)%1000 );
+//  Serial.printf("cal: %u\n", cal);
+  return ((uint64_t)(rtc_t*(uint64_t)cal) >> 12)/1000;
+}
+
 void fpm_wakup_cb_func1(void) {
   //gpio_pin_wakeup_disable();
   //ESP.wdtFeed();
@@ -439,11 +449,13 @@ void setup() {
 }
 
 void loop() {
-  if (millis() - previousMillis >= postingInterval) {
+  unsigned long currentMillis = getTime();
+  if ((long)(currentMillis - previousMillis) >= postingInterval) {
+    DEBUG_MSG("sending values... previousMillis:%u, millis():%u, difference:%d\n", previousMillis, currentMillis, currentMillis-previousMillis);
     sendValues();
-    previousMillis = millis();
+    previousMillis = getTime();
   }
-    DEBUG_MSG("sleeping now... previousMillis:%u, millis():%u\n", previousMillis, millis());
+    DEBUG_MSG("sleeping now...\n");
     delay(10);
     lightsleep();
     delay(10);