one timestamp per sensor instead of one per measurement

client/libs/DR26/DR26.cpp

@@ -76,11 +76,13 @@ void DR26::setChannel(ADS1115_MUX newChannel) {
 std::list<Message> DR26::buildMessages() {
     std::list<Message> messages;
     auto data = readData();
-    messages.emplace_back(data, sensorInformation, Time::getInstance().getEpochSeconds());
+    auto time = Time::getInstance().getEpochSeconds();
+    messages.emplace_back(data, sensorInformation, time);
     return messages;
 }
 
 SensorInformation DR26::getSensorInformation() const {
     return sensorInformation;
 }
+
 DR26::DR26(ADS1115_MUX channel, ADS1115_RANGE voltageRange) : channel(channel), voltageRange(voltageRange) {}

client/libs/DS18B20/DS18B20.cpp

@@ -27,7 +27,9 @@ Measurement DS18B20::readData() {
 std::list<Message> DS18B20::buildMessages() {
     std::list<Message> messages;
     auto measurement = readData();
-    messages.emplace_back(measurement, getSensorInformation(), Time::getInstance().getEpochSeconds());
+    auto time = Time::getInstance().getEpochSeconds();
+
+    messages.emplace_back(measurement, getSensorInformation(), time);
     return messages;
 }
 

client/libs/SentecSensors/SEM228A.cpp

@@ -21,9 +21,11 @@ outDataSolarRadiation SEM228A::readData() {
 std::list<Message> SEM228A::buildMessages() {
     auto messages = std::list<Message>();
     auto data = readData();
+    auto time = Time::getInstance().getEpochSeconds();
+
     Measurement solarRadiation{data.solarRadiation, address, NO_I2C_ADDRESS, MeasurementType::SOLAR_RADIATION,
                                data.solarError};
-    messages.emplace_back(Message{solarRadiation, getSensorInformation(), Time::getInstance().getEpochSeconds()});
+    messages.emplace_back(Message{solarRadiation, getSensorInformation(), time});
     return messages;
 }
 

client/libs/SentecSensors/SEM404.cpp

@@ -50,9 +50,11 @@ SensorInformation SEM404::getSensorInformation() const {
 std::list<Message> SEM404::buildMessages() {
     auto messages = std::list<Message>();
     auto data = getInstantaneousPrecipitation();
+    auto time = Time::getInstance().getEpochSeconds();
+
     Measurement precipitationMeasurement{data.precipitation, address, NO_I2C_ADDRESS, MeasurementType::PRECIPITATION,
                                          data.precipitationError};
-    messages.emplace_back(precipitationMeasurement, getSensorInformation(), Time::getInstance().getEpochSeconds());
+    messages.emplace_back(precipitationMeasurement, getSensorInformation(), time);
     return messages;
 }
 outDataRainGauge SEM404::readData() {

client/libs/TEROS10/TEROS10.cpp

@@ -68,7 +68,9 @@ void TEROS10::setChannel(ADS1115_MUX newChannel) {
 std::list<Message> TEROS10::buildMessages() {
     std::list<Message> messages;
     auto data = readData();
-    messages.emplace_back(data, sensorInformation, Time::getInstance().getEpochSeconds());
+    auto time = Time::getInstance().getEpochSeconds();
+
+    messages.emplace_back(data, sensorInformation, time);
     return messages;
 }