fatal error: libxml/xpath.h: No such file or directory

# apt-get install libxml2-dev libxslt1-dev python-dev

References :

python - How to install lxml on Ubuntu - Stack Overflow

Python json.dumps 顯示中文

newjson = json.dumps(myjson, ensure_ascii=False)

References :
python 打印json格式的数据中文显示问题 - onwer3的专栏 - 博客频道 - CSDN.NET

Flask-Security example

 

References :
Flask-Security 如何Session CSRF和REST Token兼得 - 简书
Token Based Authentication with Flask-Security · Desi Penguin's Blog

Linux disabling blank screen

$ xset s off
$ xset -dpms
$ xset s noblank

References :
How to Disable the Blank Screen on Raspberry Pi (Raspbian) | HackLab

Arduino LowPower library Serial print 亂碼

Serial.flush();
LowPower.powerDown(SLEEP_1S, ADC_OFF, BOD_OFF);

References :
Low Power library messing up serial text

ThingSpeak created_at to Python datetime

created_at is ISO 8601 format.

import dateutil.parser

yourdate = dateutil.parser.parse(datestring)

import datetime
datetime.datetime.strptime( "2007-03-04T21:08:12Z", "%Y-%m-%dT%H:%M:%SZ" )

References :
How do I translate a ISO 8601 datetime string into a Python datetime object? - Stack Overflow
pythingspeak/thingspeak.py at master · ninjawil/pythingspeak

InfluxDB enable Web UI

# vi influxdb/etc/config.sample.toml

[admin]
    enabled = true

Use environment variable:

INFLUXDB_ADMIN_ENABLED=true

$ vi docker-compose.yml

influxdb:
  image: influxdb:latest
  container_name: influxdb
  ports:
    - "8083:8083"
    - "8086:8086"
  environment:
    - INFLUXDB_ADMIN_ENABLED=true
  volumes:
    - ./influxdb:/var/lib/influxdb

References :
influxdb/config.sample.toml at master · influxdata/influxdb
docker-influxdb-grafana/docker-compose.yml at master · nicolargo/docker-influxdb-grafana