Fix negative value handling

Software/src/devboard/webserver/webserver.cpp

@@ -126,7 +126,7 @@ String processor(const String& var) {
     content += "</style>";
 
     // Start a new block with a specific background color
-    content += "<div style='background-color: #303E47; padding: 10px; margin-bottom: 10px;'>";
+    content += "<div style='background-color: #303E47; padding: 10px; margin-bottom: 10px;border-radius: 50px'>";
 
     // Display LED color
     content += "<h4>LED color: ";
@@ -159,7 +159,7 @@ String processor(const String& var) {
     content += "</div>";
 
     // Start a new block with a specific background color
-    content += "<div style='background-color: #2D3F2F; padding: 10px; margin-bottom: 10px;'>";
+    content += "<div style='background-color: #2D3F2F; padding: 10px; margin-bottom: 10px; border-radius: 50px'>";
 
     // Display which components are used
     content += "<h4 style='color: white;'>Inverter protocol: ";
@@ -216,16 +216,35 @@ String processor(const String& var) {
     content += "</div>";
 
     // Start a new block with a specific background color
-    content += "<div style='background-color: #333; padding: 10px; margin-bottom: 10px;'>";
+    content += "<div style='background-color: #333; padding: 10px; margin-bottom: 10px; border-radius: 50px'>";
 
     // Display battery statistics within this block
     float socFloat = static_cast<float>(SOC) / 100.0;                 // Convert to float and divide by 100
     float sohFloat = static_cast<float>(StateOfHealth) / 100.0;       // Convert to float and divide by 100
     float voltageFloat = static_cast<float>(battery_voltage) / 10.0;  // Convert to float and divide by 10
-    float tempMaxFloat = static_cast<float>(temperature_max) / 10.0;  // Convert to float and divide by 10
-    float tempMinFloat = static_cast<float>(temperature_min) / 10.0;  // Convert to float and divide by 10
+    float currentFloat = 0;
+    if (battery_current > 32767) {  //Handle negative values on this unsigned value
+      currentFloat = static_cast<float>(-(65535 - battery_current)) / 10.0;  // Convert to float and divide by 10
+    } else {
+      currentFloat = static_cast<float>(battery_current) / 10.0;  // Convert to float and divide by 10
+    }
+
+    float tempMaxFloat = 0;
+    float tempMinFloat = 0;
+    if (temperature_max > 32767) {  //Handle negative values on this unsigned value
+      tempMaxFloat = static_cast<float>(-(65535 - temperature_max)) / 10.0;  // Convert to float and divide by 10
+    } else {
+      tempMaxFloat = static_cast<float>(temperature_max) / 10.0;  // Convert to float and divide by 10
+    }
+    if (temperature_min > 32767) {  //Handle negative values on this unsigned value
+      tempMinFloat = static_cast<float>(-(65535 - temperature_min)) / 10.0;  // Convert to float and divide by 10
+    } else {
+      tempMinFloat = static_cast<float>(temperature_min) / 10.0;  // Convert to float and divide by 10
+    }
+
     char socString[10];
     char sohString[10];
+    char currentString[10];
     char voltageString[10];
     char tempMaxString[10];
     char tempMinString[10];
@@ -234,13 +253,14 @@ String processor(const String& var) {
     dtostrf(socFloat, 6, 2, socString);
     dtostrf(sohFloat, 6, 2, sohString);
     dtostrf(voltageFloat, 6, 1, voltageString);
+    dtostrf(currentFloat, 6, 1, currentString);
     dtostrf(tempMaxFloat, 6, 1, tempMaxString);
     dtostrf(tempMinFloat, 6, 1, tempMinString);
 
     content += "<h4 style='color: white;'>SOC: " + String(socString) + "</h4>";
     content += "<h4 style='color: white;'>SOH: " + String(sohString) + "</h4>";
     content += "<h4 style='color: white;'>Voltage: " + String(voltageString) + " V</h4>";
-    content += "<h4 style='color: white;'>Current: " + String(battery_current) + " A</h4>";
+    content += "<h4 style='color: white;'>Current: " + String(currentString) + " A</h4>";
     content += "<h4 style='color: white;'>Power: " + String(stat_batt_power) + " W</h4>";
     content += "<h4>Total capacity: " + String(capacity_Wh) + " Wh</h4>";
     content += "<h4>Remaining capacity: " + String(remaining_capacity_Wh) + " Wh</h4>";