Upgrade to 1.2

Readme.md

@@ -57,7 +57,7 @@ show notifications, display the weather, monitor stuff, show a clock, serve a we
 | 2x2mm screw               | 4 (Optional) | Small screws for the front                | Mostly for cosmetic purposes                |  
 | 14250 Rechargeable Battery| 1 (Optional) | Lithium-ion battery                       | Make sure it's rechargeable; most 14250 aren't |  
 | TP4056 Module             | 1 (Optional) | Charging and protection circuit           | USB connector not required                  |
-| Resistors (220kΩ and 56kΩ)| 1 (Optional) | Voltage divider                           | For monitoring the battery charge level     |
+| Resistors (220kΩ and 56kΩ)| 1 (Optional) | Voltage divider for measuring battery level  | You can also use 100kΩ and 47kΩ           |
 | Micro Slider Switch (SS-12D00) | 1 (Optional) | On/Off switch                        | Only needed if installing the battery       |  
 
 
@@ -163,6 +163,8 @@ Although it's not shown in any of the pictures or schematics, both the case and
 
     This scales the battery voltage safely down for measurement (~0-0.85V).
 
+As mentioned in the [Bill of Materials](#bill-of-materials) you can also use 100kΩ and 47kΩ resistors, just be sure to edit [example config](https://git.kopic.hr/tomislav/SmartCubeV1/src/branch/main/src/example_config.h)
+
 ![batt1](https://git.kopic.hr/tomislav/SmartCubeV1/raw/branch/main/hardware/pictures/batt1.jpg)
 
 ![batt2](https://git.kopic.hr/tomislav/SmartCubeV1/raw/branch/main/hardware/pictures/batt2.jpg)

src/SmartCube/cubeBattery.h

@@ -1,13 +1,7 @@
 #define ADC_PIN A0  // ESP8266 ADC pin
 
-// Tuneable min and max battery voltages
-float VOLTAGE_MAX = 4.2;  // Full battery voltage
-float VOLTAGE_MIN = 3.0;  // Empty battery voltage
-
-const float R1 = 220000.0;  // 220k ohms
-const float R2 = 56000.0;   // 56k ohms
 const float ADC_MAX = 1023.0; // 10-bit ADC resolution
-const float V_REF = 1.0;      // ESP8266 ADC reference voltage
+const float V_REF = 3.3;      // ESP8266 ADC reference voltage
 
 float readBatteryVoltage() {
   int rawADC = analogRead(ADC_PIN);

src/SmartCube/cubeDemo.h

@@ -1,7 +1,7 @@
 void interactiveCubeDemo() {
     const int cx = SCREEN_WIDTH / 2;
-    const int cy = SCREEN_HEIGHT / 2;
-    const int size = 15;  // small cube
+    const int cy = SCREEN_HEIGHT / 2 - 10;
+    const int size = 14;  // small cube
     float angle = 0;
     float speed = 0.05;
     bool rotating = true;
@@ -53,6 +53,19 @@ void interactiveCubeDemo() {
         } else {
             if (rotating) angle += speed;
 
+            float voltage = readBatteryVoltage();
+            int percent = batteryPercentage(voltage);
+            display.setCursor(0, 55);
+            display.print("Battery:");
+            display.setCursor(66, 55);
+            display.print(voltage, 2);
+            display.print("V");
+            display.setCursor(98, 55);
+            display.print("(");
+            display.print(percent);
+            display.print("%");
+            display.print(")");
+
             float cosA = cos(angle);
             float sinA = sin(angle);
 

src/example_config.h

@@ -8,4 +8,10 @@
 #define PIN_BTN_L 12 // D6
 #define PIN_BTN_M 13 // D7
 #define PIN_BTN_R 14 // D8
-#define PIN_BUZZER 0 // D3
+#define PIN_BUZZER 0 // D3
+
+// Battery measurement
+#define R1 220000.0 // 220k ohms
+#define R2 56000.0  // 56k ohms
+#define VOLTAGE_MAX 4.2 // Full battery voltage
+#define VOLTAGE_MIN 3.0 // Empty battery voltage

src/main.cpp

@@ -1,10 +1,11 @@
-#include "example_config.h"            // Include the configuration header file
-#include <Arduino.h>                   // Include the core Arduino library
-#include <Adafruit_SSD1306.h>          // Include the Adafruit library for the SSD1306 OLED display
-#include "SmartCube/cubeSound.h"       // Include custom header for sound functions
-#include "SmartCube/cubeButtons.h"     // Include custom header for button handling functions
-#include "SmartCube/cubeWifiManager.h" // Include custom header for managing WiFi connections
-#include "SmartCube/cubeDemo.h"        // Remove this if not using demo functions
+#include "example_config.h"              // Include the configuration header file
+#include <Arduino.h>                     // Include the core Arduino library
+#include <Adafruit_SSD1306.h>            // Include the Adafruit library for the SSD1306 OLED display
+#include "SmartCube/cubeSound.h"         // Include custom header for sound functions
+#include "SmartCube/cubeButtons.h"       // Include custom header for button handling functions
+#include "SmartCube/cubeWifiManager.h"   // Include custom header for managing WiFi connections
+#include "SmartCube/cubeBattery.h"       // Remove this if not using demo functions
+#include "SmartCube/cubeDemo.h"          // Remove this if not using demo functions
 
 // Initialize the OLED display with specified width, height, and reset pin
 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);