From cab44588c79d1d09ed0de076690942829b3ff88d Mon Sep 17 00:00:00 2001
From: Marius Gripp <m.gripp@greyrook.com>
Date: Tue, 27 Aug 2019 16:00:25 +0200
Subject: [PATCH] start uart timestamp send when time has been synced

---
 src/timesync.cpp |  2 ++
 src/uart.cpp     | 18 +++++++++++++++++-
 src/uart.h       |  1 +
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/timesync.cpp b/src/timesync.cpp
index 488561c2..09e28b3b 100644
--- a/src/timesync.cpp
+++ b/src/timesync.cpp
@@ -12,6 +12,7 @@ algorithm in applications without granted license by the patent holder.
 #if (TIME_SYNC_LORASERVER) && (HAS_LORA)
 
 #include "timesync.h"
+#include "uart.h"
 
 // Local logging tag
 static const char TAG[] = __FILE__;
@@ -282,6 +283,7 @@ void IRAM_ATTR setMyTime(uint32_t t_sec, uint16_t t_msec,
 
     timeSource = mytimesource; // set global variable
     timesyncer.attach(TIME_SYNC_INTERVAL * 60, timeSync);
+    time_uart_send_start();
     ESP_LOGI(TAG, "[%0.3f] Timesync finished, time was set | source: %c",
              millis() / 1000.0, timeSetSymbols[timeSource]);
   } else {
diff --git a/src/uart.cpp b/src/uart.cpp
index 52ac63f2..1303cbf5 100644
--- a/src/uart.cpp
+++ b/src/uart.cpp
@@ -5,6 +5,9 @@
 #include "globals.h"
 #include "driver/uart.h"
 
+static const char TAG[] = __FILE__;
+TaskHandle_t UartTask = NULL;
+
 void time_uart_send(void * pvParameters) {
   struct timeval curTime;
 
@@ -25,7 +28,7 @@ void time_uart_send(void * pvParameters) {
     // gettimeofday(&curTime, &tz);
     int sleep = 1000 - (curTime.tv_usec/1000);
     ostime_t now = os_getTime();
-    printf("Sleep Time:  %d, now: %d\n", sleep, now);
+    ESP_LOGD(TAG, "Sleep Time:  %d, now: %d\n", sleep, now);
     vTaskDelayUntil( &xLastWakeTime, (TickType_t)(sleep/portTICK_PERIOD_MS) );
 
     // Read UART for testing purposes
@@ -43,3 +46,16 @@ void time_uart_send(void * pvParameters) {
 
   vTaskDelete(NULL);
 }
+
+void time_uart_send_start() {
+  if (UartTask) {
+    return;
+  }
+  xTaskCreatePinnedToCore(time_uart_send,       // task function
+                          "time_uart_send",     // name of task
+                          2048,                 // stack size of task
+                          (void *)1,            // parameter of the task
+                          2,                    // priority of the task
+                          &UartTask,           // task handle
+                          1);                   // CPU core
+}
diff --git a/src/uart.h b/src/uart.h
index 78b81ed5..612aabbe 100644
--- a/src/uart.h
+++ b/src/uart.h
@@ -1 +1,2 @@
 void time_uart_send(void * pvParameters);
+void time_uart_send_start();