After retrieving a list of checks/sensor from an organisation with https://api.30mhz.com/api/check/organization/<organisationID> how to tell the type of a check e.g which is a temperature sensor, which is a humidity sensor etc?

Look at sensorType field in response. (sensorType can be a bit cryptic - e.g,  PTH_MLX90614_SHT35, PAR_SQ1xx_3x, pir_s_ekmb1301111k, APS180flow, etc).

The  sensorType value can be sent as the sensorTypeID when making  a GET request to 

https://api.30mhz.com/api/sensor-type/<sensorTypeID>.

The response to this request includes a metrics field which indicates what the sensor measures e.g

{

...

"metrics": [

       "temperature",

       "humidity"

   ],

      jsonKeys: [

"sht25.temp", 

"sht25.humidity”

],

…

}

The response also includes a jsonKeys field which shows the keys under which data will be returned when making a call to get the actual sensor data. The response there could look like

{

    "1565079900000": {

        "sht25.temp": 22.479999542236328,

        "sht25.humidity": 51.03499984741211

    },

    "1565080200000": {

        "sht25.temp": 22.506000137329103,

        "sht25.humidity": 51.104000091552734

    },

All sensor types can also be retrieved via GET request to

 /sensor-type/user/{email}

(Swagger)