M5Paper YTimes

E-Ink newspaper on M5Paper ESP32 Kit

Features

• Temperature/Humidity data collected by the device.
• Weather/XKCD/HackerNews/arXiv data from the internet.
• Low power consumption: last ~3 weeks (update every 30mins).
• NTP time sync, partial refresh.

Pipeline

• Frontend: Vue App deployed on AWS S3.
• Data Update: AWS CloundWatch periodically calls AWS Lambda function to update the json data on S3.
• Image Render: Puppeteer caputures screenshot of the frontend, and save it to S3.
• Display: Device fetches the screenshot and display it with its temperature and humidity sensor data.

Sever setup

The sever is built with AWS SAM.

SAM Setup

Install/Config SAM: Getting started with AWS SAM

Go to aws directory and install dependencies:

$ cd aws
$ npm install

Deploy SAM

$ sam deploy --guided

Parameters:

• AppBucketName: the UNIQUE S3 bucket name to serve the web application.
• UpdateSchedule: the schedule to update data, in AWS CloundWatch Events Schedule Expression format. Default: every 30min.
• Latitude: Client Latitude
• Longitude: Client Longitude

The server url will be http://<AppBucketName>.s3-website-<AWS_REGION>.amazonaws.com

Build Frontend

Go to web directory and install dependencies:

$ cd web
$ npm install
$ cp .env.local.example .env.local

Edit .env.local:

• VUE_APP_OWM_APPID: Your Openweather API key.
• VUE_APP_LAT: Default Latitude (can be overrided by SAM settings).
• VUE_APP_LON: Default Longitude (can be overrided by SAM settings).

Build Frontend:

$ npm build

Upload files under dist directory to S3 bucket (grant public-read access under Permissions panel when upload).

Device Setup

Go to arduino/ytimes directory and copy the config:

$ cd arduino/ytimes
$ cp ytimes_config.example.h ytimes_config.h

Edit ytimes_config.h:

• WIFI_SSID: WIFI SSID
• WIFI_PWD: WIFI password
• TIMEZONE_OFFSET: UTC time offset
• IMG_URL: http://<AppBucketName>.s3-website-<AWS_REGION>.amazonaws.com/index.jpg
• REFRESH_INTERVAL: refresh interval, in seconds.

Upload the font file data/iosevka-fixed-ss15-medium.ttf via SPIFFS.

Compile & Upload code with Arduino.

Issues

Temperature sensor data is not very accurate.