Yawpi. Yet another weather pi.

Raspberry Pi 3 climate logger from Sensor Tag CC2650 to InfluxDB

A Javascript commandline tool to record climate data from a Texas Instruments SensorTag CC2650 into an InfluxDB time series database.

It makes use of @sandeepmistry's Node BLE wrapper for the SensorTag, cf. https://github.com/sandeepmistry/node-sensortag

Requirements

• Node v.6.10.2 (current LTS) or higher
• npm or yarn
• Only tested under Raspbian Jessie

Installation

SSH into Raspberry and clone the repository:

git clone <repository-url> <repo>

(alternatively, there is a Phing build.xml for deployment via rsync)

Make sure config.json exists:

cp config.json.dist config.json

Install node dependencies and build using Yarn or npm:

yarn install
yarn run build

Note: To avoid conflicts between different architectures I had to install the node dependencies on the Pi itself.

Run:

node build/app.js

To run without sudo:

sudo setcap cap_net_raw+eip $(eval readlink -f `which node`)

Configuration

The Influx Database can reside locally or on another machine. The host must be configured in config.json:

// OPTIONAL, only used for logging
"mail" : { 
    "connectionString" : "smtps://<username>:<token>@<smtphost>",
    "to": "<recipient>",
    "from": "<sender>"
},

// REQUIRED by InfluxProxy
"influx": { 
    "host": "<influx.host>",
    "user": "<influx.user>",
    "pass": "<influx.pass>",
    "db": "<influx.pass>"
},

// REQUIRED, currently supports only single device ID
"sensor": { 
    "id": "<SensorTagId" 
},

// Interval in minutes to read data from SensorTag
"frequency": "3",

// Path to logfile
"logfile": "/var/log/piweather.log"

Install as a service

On the Raspberry the tool was installed as a service using forever-service:

    sudo forever-service install piweather --script build/app.js

Logging via Mail

The repo contains a simple e-mail logger wrapped around Nodemailer to send logs:

Example crontab entry:

    0 */2 * * * /home/pi/pi-weather/src/sendlog.js > /home/pi/cron.log

Further

The project was inspired by this blog entry https://www.hackster.io/eursan/complete-wireless-weather-station-ece694?ref=part&ref_id=13511&offset=0

Alternatively, you could use a round robin db like rrdtool which comes with some graphics capability already.