Trend accumulate option

[fabiorusco]

Try this, change test2 to your trend name.

Code:

require('trends')


-- get data for the past day
dates = {}
dates['start'] = os.date('*t')
dates['start'].day = dates['start'].day - 1
dates['end'] = os.date('*t')

-- fetch previous value
day = trends.fetch('test2', dates)


rain=0
-- for i = START, STOP, STEP
for i = 1, 48, 1 do
  rain=rain + day[i]
end
log(rain)

I modify the script :
-- Verifico numeri quarti d'ora di pioggia ultime 24 ore
require('trends')

-- Prelevo i dati ultime 24 ore
dates = {}
dates['start'] = os.date('*t')
dates['start'].day = dates['start'].day - 1
dates['end'] = os.date('*t')

-- fetch previous value
day = trends.fetch('Andamento_pioggia', dates)

rain=0
-- for i = START, STOP, STEP
for i = 1, 48, 1 do
  rain=rain + day[i]
end
grp.write('0/2/226',rain)
log(rain)

The trend this morning is:
from 0 to 9.45 all 15 minutes the trend it's 1, but the rain indicate 0.
What's the mistake?