Hi, I have a JSON output from openweather API. I want to be able to determine how many different alerts are present (See alerts section in bold). I have tried this but the answer is 0. Thanks advance!
JsonObject alerts = doc["alerts"];
Serial.print("# de elements in alerts:");
Serial.println(alerts.size());
The JSON output from the API:
{"lat":18.4274,"lon":-67.1541,"timezone":"America/Puerto_Rico","timezone_offset":-14400,"current":{"dt":1662735043,"sunrise":1662718534,"sunset":1662763001,"temp":89.62,"feels_like":102.22,"pressure":1013,"humidity":69,"dew_point":78.08,"uvi":9.89,"clouds":43,"visibility":10000,"wind_speed":3.62,"wind_deg":55,"wind_gust":6.51,"weather":[{"id":802,"main":"Clouds","description":"scattered clouds","icon":"03d"}]},"alerts":[{"sender_name":"NWS San Juan (San Juan, Puerto Rico)","event":"Rip Current Statement","start":1662686040,"end":1662760800,"description":"...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH FRIDAY\nAFTERNOON...\n* WHAT...Dangerous rip currents expected due to breaking waves to\naround 6 feet.\n* WHERE...Beaches of northwestern Puerto Rico.\n* WHEN...Through Friday afternoon.\n* IMPACTS...Dangerous swimming conditions. Rip currents can\nsweep even the best swimmers away from shore into deeper\nwater.","tags":[]},{"sender_name":"NWS San Juan (San Juan, Puerto Rico)","event":"Heat Advisory","start":1662732000,"end":1662753600,"description":"...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM AST\nTHIS AFTERNOON...\n* WHAT...Excessive heat with heat indices of 102-109 degrees\nexpected.\n* WHERE...Some lower elevations of northern-central, northwest and\nwest Puerto Rico.\n* WHEN...Between 10 AM and 4 PM AST this afternoon.\n* IMPACTS...High temperatures and humidity may cause heat\nillnesses to occur. Heat exhaustion likely with prolonged\nexposure. Heat stroke possible.","tags":["Extreme temperature value"]}]}
Pretty:
{
"lat": 18.4274,
"lon": -67.1541,
"timezone": "America/Puerto_Rico",
"timezone_offset": -14400,
"current": {
"dt": 1662735043,
"sunrise": 1662718534,
"sunset": 1662763001,
"temp": 89.62,
"feels_like": 102.22,
"pressure": 1013,
"humidity": 69,
"dew_point": 78.08,
"uvi": 9.89,
"clouds": 43,
"visibility": 10000,
"wind_speed": 3.62,
"wind_deg": 55,
"wind_gust": 6.51,
"weather": [
{
"id": 802,
"main": "Clouds",
"description": "scattered clouds",
"icon": "03d"
}
]
},
"**alerts"**: [
{
"sender_name": "NWS San Juan (San Juan, Puerto Rico)",
"event": "Rip Current Statement",
"start": 1662686040,
"end": 1662760800,
"description": "...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH FRIDAY\nAFTERNOON...\n* WHAT...Dangerous rip currents expected due to breaking waves to\naround 6 feet.\n* WHERE...Beaches of northwestern Puerto Rico.\n* WHEN...Through Friday afternoon.\n* IMPACTS...Dangerous swimming conditions. Rip currents can\nsweep even the best swimmers away from shore into deeper\nwater.",
"tags": []
},
{
"sender_name": "NWS San Juan (San Juan, Puerto Rico)",
"event": "Heat Advisory",
"start": 1662732000,
"end": 1662753600,
"description": "...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM AST\nTHIS AFTERNOON...\n* WHAT...Excessive heat with heat indices of 102-109 degrees\nexpected.\n* WHERE...Some lower elevations of northern-central, northwest and\nwest Puerto Rico.\n* WHEN...Between 10 AM and 4 PM AST this afternoon.\n* IMPACTS...High temperatures and humidity may cause heat\nillnesses to occur. Heat exhaustion likely with prolonged\nexposure. Heat stroke possible.",
"tags": [
"Extreme temperature value"
]
}
]
}