Working on firmware. A picture of the arduino pin out was added for reference.

README.md

@@ -1,2 +1,5 @@
 # PowerTester
 Testing volts and amp from a PCB and log into SDCard.
+
+
+File pro_mini.png provides a guide for the pin out.

TODO

@@ -10,3 +10,18 @@ Use current sense resistor PWR263S-20-R500F.	PLACED
 Place SD card holder.							PLACED
 Use solid state mosfet relay ASSR-1611-501E.	PLACED
 
+Firmware
+--------
+Screen							DONE
+Menu							DONE
+Buttons							DONE
+Voltage measurement				DONE
+Load line on/off				DONE
+Current measurement
+SD card
+Bluetooth
+
+
+BOX
+---
+

firmware/v01/v01.ino

@@ -1,5 +1,4 @@
 /*********************************************************************
-
 						Powertester
 
 Measures 2 voltages and current from an equipment(Load), and logs
@@ -9,22 +8,30 @@ By Jony Silva
 Tue Jun 12 14:56:12 GMT 2018
 *********************************************************************/
 
-
+#include <avr/sleep.h>
 #include <LiquidCrystal.h>
 
 
-// Configuration of pins ------------------------------------------------------------------------------
+// Configuration of pins, insert here arduino pin numbers only(not fisical)----------------------------
-#define v_batt 7						// Analog pin for the battery voltage, insert here arduino pin
+#define v_batt 7						// Analog pin for the battery voltage
-#define volt_1 0						// Analog pin for voltage 1, insert here arduino pin
+#define volt_1 0						// Analog pin for voltage 1
-#define volt_2 1						// Analog pin for voltage 2, insert here arduino pin
+#define volt_2 1						// Analog pin for voltage 2
 #define load_line 17					// Line that turns load On or Off
-#define LEFT 16							// Button 1 will be function Left, insert here arduino pin
+#define LEFT 16							// Button 1 will be function Left
-#define RIGHT 18						// Button 2 will be function Right, insert here arduino pin
+#define RIGHT 18						// Button 2 will be function Right
-#define ACT 19							// Button 3 will be function Action, insert here arduino pin
+#define ACT 19							// Button 3 will be function Action
 LiquidCrystal lcd(7, 6, 2, 3, 4, 5);	// LCD screen pins, LiquidCrystal(rs, enable, d4, d5, d6, d7)
 //-----------------------------------------------------------------------------------------------------
 
 
+// Other configurations ------------------------------------------------------------------------------------
+#define battery_volt 3					// Parameter position where battery voltage value is hold
+#define voltage_1 0						// Parameter position where voltage one value is hold
+#define voltage_2 1						// Parameter position where voltage two value is hold
+#define numOfScreens 6					// Number of screen menus, select here and rearrange String screens
+//----------------------------------------------------------------------------------------------------------
+
+
 // Macros to read the buttons --------------------------------
 #define rLEFT digitalRead(LEFT)         // Read button Left
 #define rRIGHT digitalRead(RIGHT)       // Read button Right
@@ -36,7 +43,6 @@ LiquidCrystal lcd(7, 6, 2, 3, 4, 5);	// LCD screen pins, LiquidCrystal(rs, enabl
 bool sd_status = 0;
 bool load_status = 0;
 
-const int numOfScreens = 6;
 int currentScreen = 0;
 String screens[numOfScreens][2] = {{"Voltage 1","Volts"}, {"Voltage 2","Volts"},
 	{"Load current","Amps"},{"Batt Voltage","volts"}, {"SD Logging", ""}, {"Load", ""}};
@@ -59,12 +65,12 @@ float volt_pin (int pin);			// Read and display voltage
 
 
 
-void setup() {
+void setup()
-
+{
-	pinMode(LEFT, INPUT);			// Button 1 is an input
+	pinMode(LEFT, INPUT);			// Button left is an input
-	pinMode(RIGHT, INPUT);			// Button 2 is an input
+	pinMode(RIGHT, INPUT);			// Button right is an input
-	pinMode(ACT, INPUT);			// Button 3 is an input
+	pinMode(ACT, INPUT);			// Button act is an input
-	pinMode(load_line, OUTPUT);		// Output that controls the load
+	pinMode(load_line, OUTPUT);		// load_line is an output
 
 	lcd.begin(16, 2);
 
@@ -84,7 +90,6 @@ void setup() {
 	TIMSK1 |= (1 << OCIE1A);  // enable timer compare interrupt
 	interrupts();             // enable all interrupts
 	// ----------------------------------------------------------
-
 }
 
 
@@ -97,66 +102,83 @@ ISR(TIMER1_COMPA_vect)
 //-------------------------------------------
 
 
-void loop() {
+void loop()
-
+{
-	parameters[3] = volt_pin(v_batt);
+	parameters[battery_volt] = volt_pin(v_batt);
-	parameters[0] = volt_pin(volt_1);
+	parameters[voltage_1] = volt_pin(volt_1);
-	parameters[1] = volt_pin(volt_2);
+	parameters[voltage_2] = volt_pin(volt_2);
 
 	printScreen();
 	delay(4000);
 }
 
-void menuState() {
+void menuState()
+{
 
-	if (!rRIGHT) {
+	if (!rRIGHT)
-		if (currentScreen == 5) {
+	{
+		if (currentScreen == (numOfScreens - 1))
+		{
 			currentScreen = 0;
 		}
-		else {
+		else
+		{
 			currentScreen++;
 		}
 		while (!rRIGHT); // Check if button is still pressed do nothing
 		printScreen();
 	}
 
-	if (!rLEFT) {
+	if (!rLEFT)
-		if (currentScreen == 0) {
+	{
-			currentScreen = 5;
+		if (currentScreen == 0)
+		{
+			currentScreen = (numOfScreens - 1);
 		}
-		else {
+		else
+		{
 			currentScreen--;
 		}
 		while (!rLEFT); // Check if button is still pressed do nothing
 		printScreen();
 	}
 
-	if (!rACT) {
+	if (!rACT)
-		if (currentScreen == 4) {
+	{
+		if (currentScreen == 4)
+		{
 			sd_status = !sd_status;
 		}
-		if (currentScreen == 5) {
+		if (currentScreen == 5)
+		{
 			load_status = !load_status;
 		}
 		while (!rACT); // Check if button is still pressed do nothing
 		printScreen();
 	}
-
 }
 
 
-void printScreen() {
+void printScreen()
+{
 	lcd.clear();
 	lcd.print(screens[currentScreen][0]);
 	lcd.setCursor(0,1);
 
-	if (currentScreen == 4) {
+	if (currentScreen == 4)
+	{
 		lcd.print(parameters_sd[sd_status]);
 	}
-	else if (currentScreen == 5) {
+	else if (currentScreen == 5)
+	{
 		lcd.print(parameters_load[load_status]);
 	}
-	else {
+	else if (currentScreen == 6)
+	{
+		lcd.print(screens[currentScreen][1]);
+	}
+	else
+	{
 		lcd.print(parameters[currentScreen]);
 		lcd.print(" ");
 		lcd.print(screens[currentScreen][1]);
@@ -164,8 +186,8 @@ void printScreen() {
 }
 
 
-float volt_pin(int pin) {
+float volt_pin(int pin)
-
+{
 	float voltage;
 	voltage = analogRead(pin);			// Obtain RAW voltage data
 	voltage = (voltage / 1024) * 3.3;	// Convert to actual voltage