ultrasonic-python.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys, time, requests, json, hcsr04

# you can specify interval(seconds) as first argument
interval=5 if len(sys.argv)==1 else int(sys.argv[1])

# inifinite loop
while True:
    start_time = time.time()
    print "- reading distance "
    distance = hcsr04.read_distance()
    if distance:
        print "distance: %.1f cm" % (distance)
        headers = {'Content-Type': 'application/octet-stream'}
        payload = {'distance': round(distance*10)/10, 'hoge': { 'fuga':round(distance*10)/100} }
	print "- sending data to harvest"
	binary_payload = b'd\x00\xb0\x04'
	try:
	        r = requests.post('http://harvest.soracom.io', data=binary_payload, headers=headers, timeout=5)
		print r
	except requests.exceptions.ConnectTimeout:
		print 'ERROR: connection timeout. Is 3G connection online?'
		sys.exit(1)
        if r.status_code == 400:
		print 'ERROR: failed to submit data. Did you enable Harvest for your SIM?'
		sys.exit(1)
	print 

    # sleep until next loop
    wait = start_time + interval - time.time()
    if wait > 0:
        time.sleep(wait)