diff -r c3a781b4d35b -r 520306773450 src/DetailiSpindel.cpp
--- a/src/DetailiSpindel.cpp	Fri Feb 10 17:28:46 2023 +0100
+++ b/src/DetailiSpindel.cpp	Sat Feb 11 15:48:02 2023 +0100
@@ -32,7 +32,9 @@
 {
     QSqlQuery query;
 
+#ifdef DEBUG_MONITOR
     qDebug() << "DetailiSpindel record:" << id;
+#endif
     ui->setupUi(this);
     this->recno = id;
     setWindowFlags(Qt::Window | Qt::WindowTitleHint | Qt::CustomizeWindowHint);
@@ -54,7 +56,6 @@
 
     connect(ui->codePick, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &DetailiSpindel::code_changed);
     connect(ui->modeEdit, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &DetailiSpindel::mode_changed);
-    connect(ui->logButton, SIGNAL(clicked()), this, SLOT(on_ChartButton_clicked()));
     connect(parent, SIGNAL(updateiSpindel(QString)), this, SLOT(refreshiSpindel(QString)));
     emit refreshTable();
 }
@@ -64,7 +65,7 @@
 {
     QSqlQuery query;
 
-    qDebug() << "refreshTable ispindel rec:" << this->recno;
+    qDebug() << "DetailiSpindel::refreshTable()";
 
     query.prepare("SELECT * FROM mon_ispindels WHERE record = :recno");
     query.bindValue(":recno", this->recno);
@@ -80,24 +81,31 @@
 	_beercode = query.value("beercode").toString();
 	_beername = query.value("beername").toString();
 
+	bool alarm  = (query.value("alarm").toInt() != 0) ? true:false;
+	bool online = (query.value("online").toInt() != 0) ? true:false;
+	bool mode   = (query.value("mode").toString() == "ON") ? true:false;
+
 	ui->uuidEdit->setText(_uuid);
 	ui->systemEdit->setText(_node+"/"+_alias);
 	ui->codePick->setItemText(0, _alias.toUpper()+" - "+_alias);
+	ui->alarmLED->setChecked(alarm);
 
-	if (query.value("online").toInt()) {
+	if (online) {
 	    ui->statusEdit->setText(tr("Online"));
+	    ui->statusEdit->setStyleSheet("");
             ui->codeEdit->setText(_beercode+" - "+_beername);
+	    ui->thermoMeter->setNominal(query.value("yeast_lo").toDouble());
+	    ui->thermoMeter->setCritical(query.value("yeast_hi").toDouble());
+
+	    ui->powerLED->setChecked(mode);
 	    ui->modeEdit->show();
-	    if (query.value("mode").toString() == "OFF") {
-	    	ui->powerLED->setChecked(false);
+	    if (mode) {
+		ui->modeEdit->setCurrentIndex(1);
+		ui->codePick->hide();
+	    } else {
 		ui->modeEdit->setCurrentIndex(0);
 		ui->codePick->show();
-	    } else {
-	    	ui->powerLED->setChecked(true);
-		ui->modeEdit->setCurrentIndex(1);
-		ui->codePick->hide();
 	    }
-	    ui->alarmLED->setChecked((query.value("alarm").toInt() != 0) ? true:false);
 
 	    ui->voltEdit->setText(QString("%1").arg(query.value("battery").toDouble(), 4, 'f', 3, '0'));
 	    ui->tiltEdit->setText(QString("%1").arg(query.value("angle").toDouble(), 6, 'f', 5, '0'));
@@ -106,16 +114,24 @@
 	    ui->sgEdit->setText(QString("%1").arg(sg, 5, 'f', 4, '0'));
 
 	    if (query.value("gravity").toDouble()) {
-		double og = Utils::plato_to_sg(query.value("og_gravity").toDouble());
+		double o_plato = query.value("og_gravity").toDouble();
+		double og = Utils::plato_to_sg(o_plato);
 		double svg = Utils::calc_svg(og, sg);
 
 		ui->ogVal->setText(QString("%1").arg(og, 5, 'f', 4, '0'));
-		ui->ogVal2->setText(QString("%1°P").arg(query.value("og_gravity").toDouble(), 4, 'f', 3, '0'));
+		ui->ogVal2->setText(QString("%1°P").arg(o_plato, 4, 'f', 3, '0'));
 		ui->sgVal->setText(QString("%1").arg(sg, 5, 'f', 4, '0'));
 		ui->sgVal2->setText(QString("%1°P").arg(query.value("gravity").toDouble(), 4, 'f', 3, '0'));
-		ui->svgVal->setText(QString("%1%").arg(svg, 2, 'f', 1, '0'));
-		ui->svgBar->setValue(svg);
-		ui->abvVal->setText(QString("%1%").arg(Utils::abvol(og, sg), 3, 'f', 2, '0'));
+		if (o_plato > 0.1) {
+		    ui->svgVal->setText(QString("%1%").arg(svg, 2, 'f', 1, '0'));
+		    ui->svgBar->setValue(svg);
+		    ui->abvVal->setText(QString("%1%").arg(Utils::abvol(og, sg), 3, 'f', 2, '0'));
+		} else {
+		    /* o_plato is 0 if a new beer is selected. */
+		    ui->svgVal->setText("");
+		    ui->svgBar->setValue(0);
+		    ui->abvVal->setText("");
+		}
 	    } else {
 		ui->ogVal->setText("");
 		ui->ogVal2->setText("");
@@ -140,6 +156,7 @@
 	} else {
 	    /* Offline */
 	    ui->statusEdit->setText(tr("Offline"));
+	    ui->statusEdit->setStyleSheet("background-color: red");
 	    ui->powerLED->setChecked(false);
 	    ui->alarmLED->setChecked(true);
 	    ui->codePick->hide();
@@ -154,7 +171,6 @@
 
 DetailiSpindel::~DetailiSpindel()
 {
-    qDebug() << "DetailiSpindel done";
     delete ui;
     emit entry_changed();
 }
@@ -172,7 +188,7 @@
 }
 
 
-void DetailiSpindel::on_ChartButton_clicked()
+void DetailiSpindel::on_logButton_clicked()
 {
     ChartiSpindel dialog(_beercode, _beername, this);
 }
@@ -189,7 +205,9 @@
 {
     QStringList mode ({ "OFF", "ON" });
     QString msg = QString("{\"device\":\"ispindels\",\"node\":\"" + _node + "\",\"unit\":\"" + _alias + "\",\"mode\":\"" + mode[val] + "\"}");
+#ifdef DEBUG_MONITOR
     qDebug() << "mode_changed" << val << msg;
+#endif
     webSocket->sendTextMessage(msg);
 }
 
@@ -203,18 +221,44 @@
     if (val == 0) {
 	msg.append(QString("\"beeruuid\":\"") + _uuid + "\",");
 	msg.append(QString("\"beercode\":\"") + _alias.toUpper() + "\",");
-	msg.append(QString("\"beername\":\"") + _alias + "\"}");
+	msg.append(QString("\"beername\":\"") + _alias + "\",");
+	msg.append(QString("\"yeast_lo\":20.0,"));
+        msg.append(QString("\"yeast_hi\":25.0}"));
     } else {
 	query.exec("SELECT code,name,uuid,stage,json_yeasts FROM products WHERE stage='1' OR stage='2' OR stage='3' OR stage='4' OR stage='5' OR stage='6' OR stage='7' ORDER BY code");
 	for (int i = 0; i < val; i++) {
             query.next();
         }
+	double yl = 0;
+        double yh = 40;
+        const auto& y_json = query.value("json_yeasts").toString();
+        if (! y_json.trimmed().isEmpty()) {
+            const auto& formattedJson = QString("%1").arg(y_json);
+            QJsonDocument yeasts = QJsonDocument::fromJson(formattedJson.toUtf8(),  &parseError);
+            if (parseError.error != QJsonParseError::NoError) {
+                qWarning() << "Parse error: " << parseError.errorString() << "at" << parseError.offset ;
+            } else if (yeasts.isArray()) {
+                for (int i = 0; i < yeasts.array().size(); i++) {
+                    QJsonObject obj = yeasts.array().at(i).toObject();
+                    if (obj["y_use"].toInt() == 0) {    // Primary yeast
+                        if (obj["y_min_temperature"].toDouble() > yl)
+                            yl = obj["y_min_temperature"].toDouble();
+                        if (obj["y_max_temperature"].toDouble() < yh)
+                            yh = obj["y_max_temperature"].toDouble();
+                    }
+                }
+            }
+        }
 	msg.append(QString("\"beeruuid\":\"") + query.value("uuid").toString() + "\",");
 	msg.append(QString("\"beercode\":\"") + query.value("code").toString() + "\",");
-	msg.append(QString("\"beername\":\"") + query.value("name").toString() + "\"}");
+	msg.append(QString("\"beername\":\"") + query.value("name").toString() + "\",");
+	msg.append(QString("\"yeast_lo\":%1,").arg(yl));
+        msg.append(QString("\"yeast_hi\":%1}").arg(yh));
     }
 
+#ifdef DEBUG_MONITOR
     qDebug() << "code_changed" << val << msg;
+#endif
     webSocket->sendTextMessage(msg);
 }