How to send several sensor values to Ubidots

Notehub.io
1

Following the Ubidots Routes tutorial, the JSONata Expression for a single variable such as temperature is as follows and works great.

{
“temperature”: {“value”: body.temp, “timestamp”: when * 1000},
}

How does one send multiple sensor values such as temperature and humidity? I’ve tried the following with some variations, but the route fails.

{
“temperature”: {“value”: body.temp, “timestamp”: when * 1000},
“humidity”: {“value”: body.humidity, “timestamp”: when * 1000},
}

2

Hi @tonyweil,

What error message are you seeing from Ubidots? Your JSONata expression looks correct to me.

Thanks,
Rob

3

The following error is in the Notehub.io Route log. The data never gets to Ubidots.

error transforming request: the symbol ‘}’ cannot be used as a prefix operator

4

The last comma causes this error. You should use:

{
“temperature”: {“value”: body.temp, “timestamp”: when * 1000},
“humidity”: {“value”: body.humidity, “timestamp”: when * 1000}
}

I’m surprised that your first test worked with the comma present at the end…

When I try it in jsonata site ( https://try.jsonata.org/ ) with the comma, I get the error “The symbol “}” cannot be used as a unary operator”.

Also, I don’t know if you did a cut&paste in your message but the double quote is not handled correctly by jasonata because it’s not the correct one: “ vs " .

5

Thanks, that worked.

The cut and paste quotes explains why I was not able to use JSONata site properly.
Can you explain more about the different double quotes? Apparently this one " comes from typing on the keyboard, and this one “ comes from cutting and pasting in some odd way. What a subtle difference!

6

I don’t know how you get this character but if you paste it in an ASCII converter, you get 0xE2809C . It seems to be a character using UTF-8 3 bytes encoding.

The other double quotes character in the same ASCII converter is 0x22.