Added notes about values to tweak, fixed bug with fuel gauge implementation, added interactive debugging flag

README.md

@@ -2,6 +2,13 @@ Overview
 =
 This project is a basic lighting system that can be used with smaller SentrySafe products such as the X125 model.
 
+Config
+=
+In the code you'll find the following variables which may need tweaking
+
+  * SLEEP_INTERVAL : The amount of time (in miliseconds) that the device sleeps for between checks
+  * ALERT_LEVEL : The battery level that generates an alert. This must be set between 1 and 32%, inclusive
+
 Code License
 =
 All code is licensed under the Apache 2 License (http://www.apache.org/licenses/LICENSE-2.0) unless otherwise specified.

TODO.md

@@ -2,4 +2,4 @@
   * Need to implement "always on toggle"
   * Need to implement PIR distance sensor to verify door of safe closed
   * Need to add support for Adafruit Trinket Pro
-  * Add note about adjusting values for distance, use sleep, alert threshold (if using fuel gauge)
+  * Add note about adjusting values for distance

src/MAX1704.cpp

@@ -75,7 +75,6 @@ char MAX1704::version(){
 }
 
 void MAX1704::setAlertThreshold(uint8_t level){
-
   Wire.beginTransmission(MAX1704_ADDR);
   Wire.write(MAX1704_CONFIG);
   Wire.write(MAX1704_ALERT_LEVEL);

src/src.ino

@@ -10,8 +10,10 @@
 
 // Various defines / pins / etc
 #define DEBUG true
+#define INTERACTIVE_DEBUG true
 #define USE_SLEEP false
 #define SLEEP_INTERVAL 1000 // miliseconds
+#define ALERT_LEVEL 15 // battery alert level (%)
 #define BUTTON_CAP_TOGGLE 9
 #define POT_BRIGHT_PIN A0
 #define POT_COLOR_PIN A1
@@ -41,7 +43,9 @@ void setup() {
 
   // Setup serial and wait for console
   if (DEBUG) {
-    //while(!Serial);
+    if (INTERACTIVE_DEBUG) {
+      while(!Serial);
+    }
     Serial.println("Starting up...");
   }
   
@@ -54,9 +58,12 @@ void setup() {
   // Setup / config MAX1704
   Wire.beginTransmission(MAX1704_ADDR);
   max_found = (Wire.endTransmission() == 0);
-  if (max_found == 0) {
+  if (max_found) {
     fuelGauge.reset();
     fuelGauge.quickStart();
+    fuelGauge.awake(); // In case it was turned off when sleep was enabled
+    delay(250); // Wait for it to settle before writing config value
+    fuelGauge.setAlertThreshold(ALERT_LEVEL);
   }
   
   // AdaFruit NeoPixel init
@@ -73,7 +80,11 @@ void setup() {
     fuelGauge.showConfig();
     Serial.println("----------");
   }
-}
+  
+  if (INTERACTIVE_DEBUG) {
+    while(!Serial.available());
+  }
+ }
 
 void loop() {
   // Read various values needed
@@ -107,6 +118,8 @@ void loop() {
     if (max_found) {
       Serial.print("Battery %: ");
       Serial.println(charge_percent);
+      Serial.print("Alert level: ");
+      Serial.println(fuelGauge.alertThreshold());
     }
     else {
       Serial.println("MAX1704 not found!");