Code used to turn the IoT Thermal Printer into a lunch menu & text message receiver

amqp.py

import pika, os, urlparse, sys
from Adafruit_Thermal import *

printer = Adafruit_Thermal("/dev/ttyAMA0", 19200, timeout=5)

url_str = os.environ.get('CLOUDAMQP_URL','amqp://YOUR_CLOUDAMQP_URL')
url = urlparse.urlparse(url_str)
params = pika.ConnectionParameters(host=url.hostname, virtual_host=url.path[1:],
    credentials=pika.PlainCredentials(url.username, url.password))

connection = pika.BlockingConnection(params)
channel = connection.channel() 
channel.queue_declare(queue='texts') 

def callback(ch, method, properties, body):

    printer.inverseOn()
    printer.println(' ' + '{:<31}'.format("TXT MESSAGE"))
    printer.inverseOff()

    printer.println(body)
    printer.feed(3)

    print("complete")
    print " [x] Received %r" % (body)

channel.basic_consume(callback,
    queue='texts',
    no_ack=True)

try:

    channel.start_consuming()

except KeyboardInterrupt:

    print "Break detected"
    channel.stop_consuming()

connection.close()

sys.exit()

lunch.py

from __future__ import print_function
from Adafruit_Thermal import *
from xml.dom.minidom import parseString
import itertools
import json
import re
import urllib2
import time

printer = Adafruit_Thermal("/dev/ttyAMA0", 19200, timeout=5)
today = time.strftime("%Y-%m-%d")

text = urllib2.urlopen('http://dcsd.nutrislice.com/menu/eldorado/lunch/').read()
menus = json.loads(re.search(r"bootstrapData\['menuMonthWeeks'\]\s*=\s*(.*);", text).group(1))
days = itertools.chain.from_iterable(menu['days'] for menu in menus)
day = next(itertools.dropwhile(lambda day: day['date'] != today, days), None)

if day:

    printer.inverseOn()
    printer.print('{:^32}'.format("Lunch menu for " + today))
    printer.inverseOff()

    menu_items = '\n'.join(item['food']['name'] for item in day['menu_items'])
    printer.print(menu_items)

    printer.feed(3)
    print(menu_items)

else:
    print('Day not found.')

main.py

# Called once per day (6:30am by default).
# Invokes weather forecast and sudoku-gfx scripts.
def daily():
  GPIO.output(ledPin, GPIO.HIGH)
  subprocess.call(["python", "forecast.py"])
  subprocess.call(["python", "sudoku-gfx.py"])
  subprocess.call(["python", "lunch.py"])
  GPIO.output(ledPin, GPIO.LOW)

run.py

from flask import Flask, request, redirect
import twilio.twiml
import pika, os, urlparse

app = Flask(__name__)
 
@app.route("/", methods=['GET', 'POST'])
def hello():
 
    from_number = request.values.get('From', None)
    body = request.values.get('Body', None)
    
    url_str = os.environ.get('CLOUDAMQP_URL','amqp://YOUR_CLOUDAMQP_URL')
    url = urlparse.urlparse(url_str)

    params = pika.ConnectionParameters(host=url.hostname, virtual_host=url.path[1:],
        credentials=pika.PlainCredentials(url.username, url.password))

    connection = pika.BlockingConnection(params)
    channel = connection.channel()
    channel.queue_declare(queue='texts')

    message = from_number + ": " + body

    channel.basic_publish(exchange='', routing_key='texts', body=message)
    connection.close()

    resp = twilio.twiml.Response()
    resp.message("We're so happy! We got your message and it's currently printing. Tx, Wade")
    return str(resp)
 
if __name__ == "__main__":
    app.run(debug=True)

hey mate, I am trying to do the same thing with a excelvan thermal printer and nodejs (https://www.npmjs.com/package/node-thermal-printer-driver). I can connect with printer, it cuts. Only problem is there is no text on that paper. I don't understand what I am doing wrong here. Can you comment, mate please?

Hi I need help to do the txt msg using twilio to go to printer in my kitchen
Please call +1718.508.2930 or email me