flower-power-history

node.js lib for decoding Parrot Flower Power history file.

Install

$ npm install flower-power-history

Usage

const FlowerPowerHistory = require('flower-power-history')
const fs = require('fs')

const history = FlowerPowerHistory(b64History, startupTime)
const stream = fs.createWriteStream('history.csv')
stream.once('open', (fd) => {
  history.writeCSV(stream)
  stream.end()
})

File structure

• Header

Size: 0X10

| Index | Type | Value | | ----- | -------------- | ----------------- | | 0x0 | unsigned int16 | Unknown | | 0x2 | unsigned int16 | Nb entries | | 0x4 | unsigned int32 | Last entry time | | 0x8 | unsigned int16 | First entry index | | 0xA | unsigned int16 | Last entry index | | 0xC | unsigned int16 | Session ID | | 0xE | unsigned int16 | Period |

• Entry

Size: 0xC

| Index | Type | Value | | ----- | -------------- | ---------------- | | 0x0 | unsigned int16 | Air temperature | | 0x2 | unsigned int16 | Light | | 0x4 | unsigned int16 | Soil EC | | 0x6 | unsigned int16 | Soil temperature | | 0x8 | unsigned int16 | Soil VWC | | 0xA | unsigned int16 | Battery level |

Conversions

• Temperature:

0.0473711045 * value + -11.19891627 => °C

• Light:

10981.31391 * exp ( 1 / value) + -10981.3812 => mol / m² / d

• Soil VWC:

0.179814297 * value + -40.76741498 => %

• Battery level:

0.2865304553 * value + -177.3583506 => %

• Soil EC:

TODO

TODO

• convert soil EC raw value to dS/m