Eka Puji Widiyanto ekapujiw2002

Setting up Speaker pHAT or pHAT DAC with pulseaudio

Overview

The purpose of this document if to provide a simple method of getting pulseaudio to work on Raspberry Pi with either Speaker pHAT or pHAT DAC.

Please see Software installer for Speaker pHAT or Setting up pHAT DAC for the more official guide / installer. The idea behind this guide is to provide you with a more manual alternative that lets you have a minimal setup.

Installation

People

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PENDAHULUAN

Internet of Things yang bisa disebut dengan IoT menjadi bagian yang penting dalam kemajuan teknologi. Contohnya adalah dengan mengirimkan data penggunaan air dari sensor ke cloud sehingga bisa dengan mudah melihat hasilnya. Untuk mengirimkan data penggunaan air dari sensor ke cloud maka dibutuhkan internet. Sehingga jika berbicara tentang IoT maka kira berbicara tidak terlepas dari 2 hal, yaitu: sensor dan internet.

PERANGKAT KERAS YANG DIBUTUHKAN

NodeMCU Lua WiFi (Rp85.000)
Water Flow Sensor (Rp70.000)
Lampu LED (Rp350)

Backup/Image

Make sure the if value is correct! If doing this over SSH then open a TMUX session first... or else...

dd if=/dev/YOUR-DEVICE conv=sync,noerror bs=64K | gzip -c  > /home/portaj/macbook.img.gz

NOTE: You might not want to compress the image. It just means you have to uncompress it later to mount it. If you're planning to access the data soon, or frequently, don't compress it.

Saving a copy of the drive geometry

Save it in the same directory as the compressed image so later on if you decide you want to mount or extract data from the image you can see the partition structure without having to decompress the whole image. There might be some other ways to mount a compressed image.

	import socket

	if __name__ == "__main__":
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	sock.connect(("localhost", 9000))
	data = "some data"
	sock.sendall(data)
	result = sock.recv(1024)
	print result
	sock.close()

	#!/usr/bin/env python

	import binascii

	def CRC32_from_file(filename):
	buf = open(filename,'rb').read()
	buf = (binascii.crc32(buf) & 0xFFFFFFFF)
	return "%08X" % buf

	yaourt --m-arg "--skippgpcheck" -S {{ package }}

	###
	--skipinteg
	Do not perform any integrity checks (checksum and PGP)
	on source files.

	--skipchecksums
	Do not verify checksums of source files.

	[Unit]
	Description=Some description
	After=network.target

	[Service]
	Type=simple
	User=user
	WorkingDirectory=/home/user/somedir
	Environment=PYTHONPATH=/home/user/somedir
	ExecStart=/home/user/venv/bin/python script.py

	#!/bin/sh

	: ${1?"Usage: $0 ip subnet to scan. eg '192.168.1.'"}

	subnet=$1
	for addr in `seq 0 1 255 `; do
	# ( echo $subnet$addr)
	( ping -c 3 -t 5 $subnet$addr > /dev/null && echo $subnet$addr is Alive ) &
	done

	from flask import Flask, request, jsonify
	from flask_sqlalchemy import SQLAlchemy
	from flask_marshmallow import Marshmallow
	from flask_restful import Resource, Api


	app = Flask(__name__)
	api = Api(app)
	app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///users.db'
	app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False