Convert ASCII/Hex to Decimal Number

[adisti...@gmail.com]

Hi everyone,

I need your help because I am new to Node-RED. I tried to send data from BME to cloud with smart mesh. In the node RED, I received a message that looks like this:

4‎/‎21‎/‎2017‎ ‎2‎:‎46‎:‎45‎ ‎PMnode: mote events/responsesiot-2/type/mote/id/00-17-0d-00-00-58-f2-6c/evt/notifData/fmt/json : msg.payload : Object

 

{ d: object }object

d: object

utcSecs: 1029561249

utcUsecs: 536750

macAddress: "00-17-0d-00-00-58-f2-6c"

srcPort: 60000

dstPort: 60000

data: array[5]

0: 50

1: 53

2: 46

3: 52

4: 51

I need the array of data to be converted to temperature, in this case it’s 25.43. I tried to convert it to decimal, but failed several times. Oh, the array of data looks like ASCII, but it will be converted to Hex if I clicked the number. Can anyone help me? It is really appreciated. Thank you.

Ixora

Tampilkan konten yang dipangkas

[Dave C-J]

Hi,

the data array is of ascii like characters so the easiest way to convert it is to make that into a buffer then convert that to a number...

so a function with something like

msg.payload.data = Number(new Buffer(msg.payload.data));

return msg;

should replace the existing data with a number. Of course you can rename the property if you like/need to.

[adisti...@gmail.com]

Hi,

Thank you for the fast reply. And it works perfectly fine! Thank you very much..

Thumbs up!