太陽光＋3Gモデム＋防水ケースで屋外用RaspberryPiデータロガーを作る

#Python3
import smbus2
import bme280
from ina219 import INA219
import urllib.request
import json


bme280_address=0x76 #0x76 or 0x77
SHUNT_OHMS = 0.1 #milli ohm
APIKEY = "xxxxxxxxxxxxxxxxxx"
Url = "https://gw.machinist.iij.jp/endpoint"
method = "POST"

def machinist_body_property(agent: str):
    data = {}
    data['agent'] = agent
    data['metrics'] = []
    return data

def machinist_metrics_property(name: str, value):
    metric = {}
    metric['name'] = name
    metric['data_point'] = {'value': value}
    return metric

def sendMachinist(data):

    headers = {
        "Content-Type": "application/json",
        "Authorization": "Bearer " + APIKEY,
        "User-Agent": "Python3"
    }

    senddata = json.dumps(data).encode("ascii")
    try:
        req = urllib.request.Request(Url, senddata, headers)
        data = urllib.request.urlopen(req)
        html = data.read().decode("ascii")
        if "Succeeded" in html:
            print("Send succeeded")
        data.close()
    except Exception as e:
        print(e)


#ina219
ina = INA219(SHUNT_OHMS)
ina.configure()
#bme280
i2c = smbus2.SMBus(1)
calibration_params = bme280.load_calibration_params(i2c,bme280_address)
data = bme280.sample(i2c, bme280_address, calibration_params)
#make_senddata
senddata=machinist_body_property('SolarPi')
senddata['metrics'].append(machinist_metrics_property('BatteryVoltage',ina.voltage()))
senddata['metrics'].append(machinist_metrics_property('BatteryCurrent',ina.current()))
senddata['metrics'].append(machinist_metrics_property('Temperature',data.temperature))
senddata['metrics'].append(machinist_metrics_property('Humidity',data.humidity))
senddata['metrics'].append(machinist_metrics_property('Pressure',data.pressure))
sendMachinist(senddata)

#!/bin/bash

#指定したUSBモデムの接続が確立しているか判定
function check_network_connection () {
	/sbin/ifconfig | grep -q "$1"
}

#main 通信確立後に実行したいやつを書く
function main () {
	python3 /home/pi/sendMachinist.py #データログ送信
	raspistill -o /home/pi/image.jpg -q 10 -w 1200 -h 900 #写真撮影
	/home/pi/dropbox_uploader.sh upload /home/pi/image.jpg pi/`date +%Y-%m-%d_%H:%M:%S`.jpg #dropbox送信
}

SOC_USB=/sys/devices/platform/soc/20980000.usb/buspower


echo 1 | sudo tee SOC_USB >/dev/null #USBバスパワーON
sudo /sbin/ifup ppp0 #USBモデムアップ

#接続確立まで15秒待機
for ((i=0; i<15; i++))
do
	if check_network_connection ppp0; then
		echo "Online"
		main
		break
	else
		sleep 1
	fi
done

sudo /sbin/ifdown ppp0 #USBモデムダウン
echo 0 | sudo tee SOC_USB >/dev/null #USBバスパワーOFF