From d8f96e6114c41aa72268e6e025289509bbc617a1 Mon Sep 17 00:00:00 2001
From: Mike Barela <mydigitalhome@gmail.com>
Date: Thu, 25 Apr 2019 14:25:07 -0400
Subject: [PATCH] Create solartrack.ino

move from https://github.com/adafruit/Solar-charging-tracker/blob/master/solartrack.pde
---
 .../solartrack/solartrack.ino                 | 104 ++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 Solar_Charger_Tracker/solartrack/solartrack.ino

diff --git a/Solar_Charger_Tracker/solartrack/solartrack.ino b/Solar_Charger_Tracker/solartrack/solartrack.ino
new file mode 100644
index 000000000..50c7e2264
--- /dev/null
+++ b/Solar_Charger_Tracker/solartrack/solartrack.ino
@@ -0,0 +1,104 @@
+/* 
+Portable solar panel efficiency tracker. For testing out solar panels!
+See https://learn.adafruit.com/portable-solar-charging-tracker for more information
+Code is public domain, MIT License by Limor "Ladyada" Fried 
+*/
+
+// include the library code:
+#include <LiquidCrystal.h>
+#include <Wire.h>
+
+// initialize the library with the numbers of the interface pins
+LiquidCrystal lcd(2, 3, 4, 5, 6, 7 );
+
+#define aref_voltage 3.3         // we tie 3.3V to ARef and measure it with a multimeter!
+
+int lipoPin = 3;      // the battery 
+float lipoMult = 1.666;  // how much to multiply to get the original voltage
+
+int PVPin = 2;      // the cell
+float PVMult = 2;  // how much to multiply to get the original voltage
+
+int currentPin = 1;
+float currentMult = 208; // how much to multiply to get the original current draw
+    
+void setup(void) {
+  // We'll send debugging information via the Serial monitor
+  Serial.begin(9600);   
+  
+  // set up the LCD's number of rows and columns: 
+  lcd.begin(16, 2);
+  lcd.clear();
+  // Print a message to the LCD.
+  lcd.print("Solar logger");
+  delay(2000);
+  lcd.clear();
+  // If you want to set the aref to something other than 5v
+  analogReference(EXTERNAL);
+  
+  byte delta[8] = {
+	B00000,
+	B00100,
+	B00100,
+	B01010,
+	B01010,
+	B10001,
+	B11111,
+	B00000
+};
+
+  lcd.createChar(0, delta);
+}
+
+
+
+void loop(void) {
+  int adcreading;
+ 
+  adcreading = analogRead(lipoPin);  
+  Serial.println(adcreading);
+  
+  float lipoV = adcreading;
+  lipoV *= aref_voltage;
+  lipoV /= 1024;
+  lipoV *= lipoMult;
+
+  lcd.clear();
+  Serial.print("LiPo voltage = ");
+  Serial.println(lipoV);     // the raw analog reading
+  
+  lcd.setCursor(0, 0);
+  lcd.print("LiPo=");
+  lcd.print(lipoV);
+  lcd.print(' ');
+  lcd.write((uint8_t)0);
+  
+  adcreading = analogRead(PVPin);  
+  float PVV = adcreading;
+  PVV *= aref_voltage;
+  PVV /= 1024;
+  PVV *= PVMult;
+  
+  lcd.print((int)((PVV-lipoV) * 1000), DEC);  // in mV
+  lcd.print("mV");
+  
+  Serial.print("PV voltage = ");
+  Serial.println(PVV);     // the raw analog reading
+
+  lcd.setCursor(0, 1);
+  lcd.print("PV=");
+  lcd.print(PVV);
+  
+  adcreading = analogRead(currentPin);  
+  float currentI = adcreading;
+  currentI *= aref_voltage;
+  currentI /= 1024;
+  currentI *= currentMult;
+  Serial.print("Current (mA) = ");
+  Serial.println(currentI);     // the raw analog reading
+  
+  lcd.print(" I=");
+  lcd.print((int)currentI);
+  lcd.print("mA");
+  delay(1000);
+}