# homespun-grovepi
This is a Node.js module that reads sensors residing on a [Raspberry Pi](https://www.raspberrypi.org)
and a [GrovePi+ Shield](http://www.dexterindustries.com/shop/grovepi-board/)
and transcodes them to [TSRP](http://thethingsystem.com/dev/Thing-Sensor-Reporting-Protocol.html).
You should review the [homespun root](https://github.com/mrose17/homespun) in order to understand home this repository fits into
the homespun family.

In brief,
you need to be running a process on your home network that listens for TSRP traffic,
and then feeds it to a server that listens for TSRP and uploads the sensor readings to the management cloud of your choice --
here's [my choice](https://github.com/homespun-wink).

Note that this repository does not have the "Wiki" section --
if you want to discuss the homespun framework or homespun-grovepi,
please send an email to the [maintainer](mailto:mrose17@homespun.io)
requesting to be added to the [homespun team](https://homespun-io.slack.com).

## Installation

The first step is to get a [Raspberry Pi](https://www.raspberrypi.org)
and a [GrovePi+ Shield](http://www.dexterindustries.com/shop/grovepi-board/).
(Note that there is an earlier version called the GrovePi shield -- no longer for sale;
however, without loss of generality,
the same instructions apply to both!)

Once you have the RPi configured,
you'll need to install software on your RPi that will talk to the GrovePi+ shield.
You can find the QuickStart [here](http://www.dexterindustries.com/GrovePi/get-started-with-the-grovepi/),
but here's the gist:

First, gently mount on the GrovePi+ on the RPi, the pins should align exactly.

Next, install the software:

        pi@raspberrypi ~ $ git clone https://github.com/DexterInd/GrovePi.git
        ...
        pi@raspberrypi ~ $ cd GrovePi/Script
        pi@raspberrypi ~/GrovePi/Script $ chmod +x install.sh
        pi@raspberrypi ~/GrovePi/Script $ sudo ./install.sh
        ...

These commands may take a while,
and (as of this writing) you'll be asked twice:

        Do you want to continue [Y/n]?

Please be patient.
When complete,
your RPi will reboot.

You can verify that everything installed OK, by running this command:

        pi@raspberrypi ~ $ sudo i2cdetect -y 1
             0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
        00:          -- 04 -- -- -- -- -- -- -- -- -- -- --
        ...

At this point you might as well upgrade the firmware on the GrovePi+ to the latest:

        pi@raspberrypi ~/GrovePi/Firmware $ sudo ./firmware_update.sh
        ...

The script may ask you to connect a jumper to the reset pin -- this is no longer necessary.
You can check the firmware version by running:

        pi@raspberrypi ~/GrovePi/Software/Python $ python grove_firmware_version_check.py
        ('GrovePi has firmware version:', '1.2.2')

Finally,
here is the list of [supported sensors](http://www.dexterindustries.com/GrovePi/supported-sensors/).

## Programming

The "preferred" language for programming the GrovePi+ is Python.
However in the `GrovePi/Software` directory,
you will find examples in C, C#, Go, Node.js, and Python.

If you want to use the `homespun.js` script:

        pi@raspberrypi ~ $ cd homespun-master
        pi@raspberrypi ~/homespun-master $ npm -l install
        ...

In the file `config.json`,
there are several configurations:

* the first configuration is an example of using a Grove Water Sensor connected to pin D7; and,

* the second configuration, `the-kitchen-sink`, is purposefully incomplete --
it contains definitions for all the Grove sensors known to work with the `homespun.js` script.

A configuration file is used to tell the `homespun.js` program which sensors are active, e.g.,

        pi@raspberrypi ~/homespun-master $ node homespun.js --config name whatever.json

## Running

        pi@raspberrypi ~/homespun-master $ npm -l install
        ...
        pi@raspberrypi ~/homespun-master $ node homespun-grovepi.js

Without any arguments, homespun.js will use the first entry in the file `config.json`.

## Not (Yet) Supported

* [Grove - Alcohol Sensor](http://www.seeedstudio.com/wiki/Grove_-_Alcohol_Sensor)

* [Grove - Barometer Sensor](http://www.seeedstudio.com/wiki/Grove_-_Barometer_Sensor)

* [Grove - CO2 Sensor](http://www.seeedstudio.com/wiki/Grove_-_CO2_Sensor)

* [Grove - Digital Light Sensor](http://www.seeedstudio.com/wiki/Grove_-_Digital_Light_Sensor)

* [Grove - Dust Sensor](http://www.seeedstudio.com/wiki/Grove_-_Dust_Sensor)

* [Grove - Luminance Sensor](http://www.seeedstudio.com/wiki/Grove_-_Luminance_Sensor)

* [Grove - Tempture & Humidity Sensor (High-Accuracy & Mini)](http://www.seeedstudio.com/wiki/Grove_-_Tempture%26Humidity_Sensor_(High-Accuracy_%26Mini)_v1.0)