bubuabu / flower-power-history

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