Smashed the serial echo demo from PyBBIO into the MQTT BBB example from Mosquitto…boom, serial to MQTT on the BBB

serial_mqtt.py

# serial_echo.py - Alexander Hiam - 4/15/12
# 
# Prints all incoming data on Serial2 and echos it back.
# 
# Serial2 TX = pin 21 on P9 header
# Serial2 RX = pin 22 on P9 header
# 
# This example is in the public domain

from bbio import *
import serial
import mosquitto
import os

broker = "solr.t1p1.com"
port = 1883
def setup():
  # Start Serial2 at 9600 baud:
  Serial2.begin(115200)

#MQTT callbacks

def on_connect(rc):
    if rc == 0:
    #rc 0 successful connect
        print "Connected"
    else:
        raise Exception


def on_publish(val):
    print "Published ", val


#called on exit
#close serial, disconnect MQTT

def cleanup():
    print "Ending and cleaning up"
    Serial2.close()
    mqttc.disconnect()

def loop():
  if (Serial2.available()):
	mypid = os.getpid()
	client_uniq = str(mypid)
	mqttc = mosquitto.Mosquitto(client_uniq)
	data = ''
	while(Serial2.available()):
		data += Serial2.read()
		delay(5)
	mqttc.connect(broker, port, 60, True)
	mqttc.publish("rooms/15", data)
	delay(200)

run(setup, loop)