voltmeter_things.ino

## voltmeter_things.ino
const int voltPin =  4;
const int maxVoltAdjust = 230; // analog out is max 255, but for my voltmeter 230 == 100%

void setup()   {
  pinMode(voltPin, OUTPUT);
  Serial.begin(19200);
}

String inData;

void loop() {
  while (Serial.available() > 0)
    {
        char recieved = Serial.read();
        inData += recieved;
        // Process message when new line character is recieved
        if (recieved == '\n') {
            Serial.print("Received: ");
            Serial.print(inData);
            char char_string[inData.length()+1];
            inData.toCharArray(char_string, inData.length()+1);
            int num = atoi(char_string);
            analogWrite(voltPin, (float) num / 100 * maxVoltAdjust);
            delay(200);
            inData = ""; // Clear recieved buffer
        }
    }
}

## voltmeter_things.rb
#!/usr/bin/ruby
require 'filewatcher'
require 'sqlite3'
require 'rubygems'
require 'serialport'

port_str = "/dev/tty.usbmodem1801"
baud_rate = 19200
data_bits = 8
stop_bits = 1
parity = SerialPort::NONE
sp = SerialPort.new(port_str, baud_rate, data_bits, stop_bits, parity)
sp.sync = true

FileWatcher.new(["ThingsLibrary.db"]).watch do

	# ~/Library/Containers/com.culturedcode.things/Data/Library/Application\ Support/Cultured\ Code/Things/ThingsLibrary.db
	# cough cough cough
	`cp ThingsLibrary.db ThingsLibrary_cache.db`

	db = SQLite3::Database.new("ThingsLibrary_cache.db")
	db.results_as_hash = true

	row = db.get_first_row( "SELECT count(ZTHING.Z_PK) as today FROM ZTHING LEFT OUTER JOIN ZTHING PROJECT on ZTHING.ZPROJECT = PROJECT.Z_PK LEFT OUTER JOIN ZTHING AREA on ZTHING.ZAREA = AREA.Z_PK WHERE ZTHING.ZSTARTDATE != '' and ZTHING.ZSTATUS != 3  and ZTHING.ZSTATUS != 2 and ZTHING.ZTRASHED = 0 and ZTHING.ZSTART = 1 ORDER BY ZTHING.ZTODAYINDEX;"  )
	today = row['today']
	puts "(today #{today})"

	row = db.get_first_row( "SELECT date(ZSTOPPEDDATE, 'unixepoch', '+31 years', 'localtime') as date, count(Z_PK) as completed from ZTHING WHERE ZSTATUS = 3 and date = (SELECT date('now')); " )
	completed = row['completed']
	puts "(completed #{completed})"

	total = completed + today
	puts "(total #{total})"
	percent = completed.to_f / total * 100
	puts percent.round
	sp.puts percent.round

	db.close

end