add EnvironmentMetrics to nodes tab

app/src/main/java/com/geeksville/mesh/NodeInfo.kt

@@ -156,6 +156,17 @@ data class NodeInfo(
     val voltage get() = deviceMetrics?.voltage
     val batteryStr get() = if (batteryLevel in 1..100) String.format("%d%%", batteryLevel) else ""
 
+    private fun envFormat(f: String, unit: String, env: Float?): String =
+        if (env != null && env > 0f) String.format(f + unit, env) else ""
+
+    val envMetricStr
+        get() = envFormat("%.1f", "°C ", environmentMetrics?.temperature) +
+                envFormat("%.0f", "%% ", environmentMetrics?.relativeHumidity) +
+                envFormat("%.1f", "hPa ", environmentMetrics?.barometricPressure) +
+                envFormat("%.0f", "KΩ ", environmentMetrics?.gasResistance) +
+                envFormat("%.2f", "V ", environmentMetrics?.voltage) +
+                envFormat("%.1f", "mA", environmentMetrics?.current)
+
     /**
      * true if the device was heard from recently
      *

app/src/main/java/com/geeksville/mesh/ui/UsersFragment.kt

@@ -42,6 +42,7 @@ class UsersFragment : ScreenFragment("Users"), Logging {
         val lastTime = itemView.lastConnectionView
         val powerIcon = itemView.batteryIcon
         val signalView = itemView.signalView
+        val envMetrics = itemView.envMetrics
     }
 
     private val nodesAdapter = object : RecyclerView.Adapter<ViewHolder>() {
@@ -136,6 +137,13 @@ class UsersFragment : ScreenFragment("Users"), Logging {
 
             holder.lastTime.text = formatAgo(n.lastHeard)
 
+            if (n.envMetricStr.isNotEmpty()) {
+                holder.envMetrics.text = n.envMetricStr
+                holder.envMetrics.visibility = View.VISIBLE
+            } else {
+                holder.envMetrics.visibility = View.GONE
+            }
+
             if (n.num == ourNodeInfo?.num) {
                 val info = model.myNodeInfo.value
                 if (info != null) {