HT stopfen modifies. Some improvements in the firmare.

doc/links.md

@@ -1,2 +1,3 @@
 https://arduinodiy.wordpress.com/2017/01/02/reviewing-the-wemos-battery-shield/
 https://arduinodiy.wordpress.com/2016/12/25/monitoring-lipo-battery-voltage-with-wemos-d1-minibattery-shield-and-thingspeak/
+https://www.thingiverse.com/thing:3015533

firmware/config.h

@@ -1,6 +1,7 @@
 
-#define DEBUG 1
+//#define DEBUG 1
 
+#define BATTERY_POWERED 1
 #define POWERSAVING 1
 
 #define SENSOR_TEMPERATURE    0

firmware/firmware.ino

@@ -62,6 +62,8 @@ void setup() {
 
   digitalWrite(STATUS_LED_PIN, HIGH);
 
+  lowBatCheck(getBatteryVoltage());
+
   // Establish WiFi connection
   String wifiName = "oko-weather-" + String(ESP.getChipId());
 
@@ -111,7 +113,7 @@ void setup() {
 
   digitalWrite(STATUS_LED_PIN, LOW);
 
-  lowBatCheck();
+  lowBatCheck(currentSensorData[SENSOR_BAT_VOLTAGE]);
 
   WiFi.mode(WIFI_OFF);
   WiFi.forceSleepBegin();
@@ -126,9 +128,9 @@ void setup() {
 
 //*************************************************************************//
 
-void lowBatCheck()
+void lowBatCheck(float v)
 {
-  if (currentSensorData[SENSOR_BAT_VOLTAGE] <= BAT_LOW_VOLTAGE)
+  if (v <= BAT_LOW_VOLTAGE)
   {
 #ifdef DEBUG
     Serial.println("Low battery, going into deep sleep.");
@@ -140,8 +142,6 @@ void lowBatCheck()
 
 void loop() {
 
-  lowBatCheck();
-
 #ifdef POWERSAVING
   delay(50);
   return;

hardware/ht-dn50_stopfen.scad

@@ -1,15 +1,17 @@
 
+radius=25;
+height=30;
 
 union() {
 	difference() {
-		cylinder(h=30, r=25, $fn=300);
+		cylinder(h=height, r=radius, $fn=300);
 		translate([0, 0, -5])
-            cylinder(h=40, r=23, $fn=300);
+            cylinder(h=height+10, r=radius-2, $fn=300);
 	}
     difference() {
         union() {
-            translate([0, 0, 30])
-                cylinder(h=3, r=30, $fn=300);
+            translate([0, 0, height])
+                cylinder(h=3, r=radius+5, $fn=300);
             color("green")
                 translate([-22, -12, 31])
                     cube([44, 24, 5]);