Is anyone familiar with using openweather api to show accumulated rainfall over the period of last 24 hours?

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1

s anyone fimiliar with using openweather api to show accumulated rainfall over the period of last 24 hours?

2

You will need to show the returned historical data, then some one may give you an example how to parse it to return the info you require.

3

I have some experience to get the average f temperature forecast, get the rainfall should be similar….I will. Heck this when I have access to my nodered

Pierre RUWET

4

Hello,

First you need to check if the rain data is available for your area on openweathermap. this is not the case for me. I only use the fee plan and have current weather with no rain and forecast3h.

5

I do something similar to what you want.

The mechanics will work.

Mine if from midnight and can gather the total cumulative rain as each hour goes by.

So, hourly I get the weather data.

Sorry if it seems I am dropping this code on you, but just now I feel terrible. I think I have the flu.

//  2024 04 09
//
//  Input:  `msg.payload.rain` for normal ops.
//  Ouptut: `msg.rain_now`

//===================================================================================

let rainamount = context.get('rainamount') || []    // get context variable, default empty array

//      If `reset` message received.
if (msg.reset == "reset") {
    node.status({ text: "RESET" });
    flow.set("total_rain", 0);
    flow.set("todays_rain", 0);
    context.set('rainamount', []);
    rainamount = [];
    return;
}

let todays_rain = flow.get("total_rain") || 0;
node.warn("Today's rain is " + todays_rain);
node.warn("Incoming rain message " + msg.payload.rain);

//==================================================
//  2024 04 09
//      This is if there is no rain and the message structure is not defined.
if (msg.payload.rain == undefined) {
    node.warn("no rain detected in message");
    msg.payload.rain = 0;
    node.warn("Set payload.rain to 0");
    node.warn(msg.payload.rain);
}
//==================================================

//  2024 04 09
//      This is where the latest value is parsed.
let rain_now = msg.payload.rain * 10;
node.warn("at this point rain_now is = " + rain_now / 10);

//==================================================
//  2024 04 09      Get `count` value.
let count = msg.count || 0;

node.warn("count value set to " + count);

if (count == 0)
{
    node.warn("I shouldn't be here");
    return;
}
//  Reduce `count` size.
//  2024 07 31   BIG MISTAKE!   If you reduce the count size then divide `todays_rain` by a SMALLER number, the result will be BIGGER - not smaller!
//count = count / 4;
count = count * 4
node.warn("modified count value set to " + count);

//==================================================

//==================================================
//  2024 04 09
//
//  Store rain values in context to maybe help with tracing things.
rainamount.push(rain_now)    // Add a new array element 
context.set('rainamount', rainamount)   // save to node context
//==================================================

node.warn("Adding rain totals together (count included)");

todays_rain = (todays_rain + rain_now);
flow.set("total_rain", todays_rain);

node.warn("Value 1 = " + todays_rain);

todays_rain = Math.round(todays_rain / count) / 10;

node.warn("Value 2 = " + todays_rain);

node.status({ text: "counter = " + msg.count + " Total rain today = " + todays_rain + " Rain = " + rain_now});

flow.set("count", count);

//  *********   msg.rain_now used to send data
msg.rain_now = todays_rain;
msg.topic = null;

return msg;