From 4f78ef5b3ab7d4ff864b7ad6d31e0184d1aa0872 Mon Sep 17 00:00:00 2001
From: Thomas Schmucker <ts@its1.de>
Date: Fri, 14 Aug 2026 14:05:35 +0200
Subject: automatischer Download von minmea

---
 src/main.cpp | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

(limited to 'src/main.cpp')

diff --git a/src/main.cpp b/src/main.cpp
index e699c6a..ed98cb4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,15 +1,22 @@
-#include <asio.hpp>
+// Standard C++
+#include <array>
 #include <ctime>
+#include <exception>
+#include <format>
 #include <iostream>
 #include <string>
 
+// Asio
+#include <asio.hpp>
+
+// minmea
 #include "minmea.h"
 
 using namespace std;
 
-// constexpr auto PORT     = "/dev/cuaU0";
-constexpr auto PORT     = "/dev/ugen0.14";
-constexpr auto BAUDRATE = 9600;
+constexpr auto PORT         = "/dev/cuaU0";
+constexpr auto BAUDRATE     = 9600;
+constexpr auto KNOTS_TO_KMH = 1.852F;
 
 namespace {
 
@@ -32,7 +39,7 @@ read_line(asio::serial_port& com)
 }
 
 string
-get_gps_timestamp(const minmea_time& time, const minmea_date& date)
+get_gps_datetime(const minmea_time& time, const minmea_date& date)
 {
 	tm tm_utc{};
 	::minmea_getdatetime(&tm_utc, &date, &time);
@@ -73,11 +80,13 @@ main()
 				continue;
 			}
 
-			auto timestamp = get_gps_timestamp(frame.time, frame.date);
+			auto timestamp = get_gps_datetime(frame.time, frame.date);
 
-			cout << timestamp << ": $RMC floating point degree coordinates and speed: ("
-			     << ::minmea_tocoord(&frame.latitude) << "," << ::minmea_tocoord(&frame.longitude) << ") "
-			     << ::minmea_tofloat(&frame.speed) << '\n';
+			cout << format("{}: $RMC floating point degree coordinates and speed: ({},{}) {} km/h\n",
+			               timestamp,
+			               ::minmea_tocoord(&frame.latitude),
+			               ::minmea_tocoord(&frame.longitude),
+			               ::minmea_tofloat(&frame.speed) * KNOTS_TO_KMH);
 		}
 	}
 	catch ( exception& e ) {
-- 
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