Send the last tweet and sentiment about the message to Arduino

twitterdino.pde

#define GREEN 8
#define RED 12

const int sepToken = 666;
int val = 0;
int lastVal = 0;

void setup() {
  pinMode(GREEN, OUTPUT);
  pinMode(RED, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  if (Serial.available()) {
    val = Serial.read();
    if (lastVal == sepToken) {
      if (val == 0) {
        digitalWrite(GREEN, HIGH);
        digitalWrite(RED, LOW);
      }
      if (val == 0) {
        digitalWrite(GREEN, HIGH);
        digitalWrite(RED, LOW);
      }
      if (val == 0) {
        digitalWrite(GREEN, HIGH);
        digitalWrite(RED, LOW);
      }
    } else {
      // Print "val" to the LCD Display
    }
    Serial.println(val);
    lastVal = val;
  }
}

twitterdino.py

import serial
import time
import urllib
import requests

from json import loads
from twython import Twython

# Token, we choose not printable values
SEPARATOR_TOKEN = 666
# Sentimen API
url = "http://www.viralheat.com/api/sentiment/review.json?text=%s&api_key=<KEY>"
# Connect to arduino via serial port
arduino = serial.Serial('/dev/ttyACM0', 9600, timeout=1)

# Write to Arduino
def writeToArduino():
    twitter = Twython()
    public_timeline = twitter.getPublicTimeline()
    last_tweet = public_timeline[-1]
    text = last_tweet["text"]
    # We get the numbers of the each character
    codes = [ord(c) for c in text]]
    # Get the sentiment
    response = requests.get(url % urllib.quote(text))
    sentiment_response = loads(response.content)
    if sentiment_response["mood"].lower() == "negative":
        sentiment = 0
    elif sentiment_response["mood"].lower() == "positive":
        sentiment = 1
    else:
        sentimen = 2
    # Add characters codes and sentiment value
    arduino.write(codes + [SEPARATOR_TOKEN, sentiment])

while True:
    writeToArduino()