B4J Question Convert signed byte to int

Philip Prins · Apr 26, 2017

Hello ,

I get a HEX value that is a temperature reading 16 Hex is 22 degrees.
But when the temperature = -15 the HEX value is F0

How can i convert this HEX value to -15?

Tnx in advance
Philip

stevel05 · Apr 26, 2017

Assign the value to a byte first, although F0 should be -16.

B4X:

  Dim H As String = "F0"
    Dim b As Byte = Bit.ParseInt(H,16)
    Log(b)

Erel · Apr 26, 2017

What do you mean with hex value? Is it sent as a string?
Why not send it as a byte?

Philip Prins · Apr 26, 2017

Erel said:
What do you mean with hex value? Is it sent as a string?
Why not send it as a byte?

Hello Erel,

It comes from the SIGFOX network, it is sent by their backend as a 12 byte packet in HEX.
https://www.arduino.cc/en/Guide/MKRFox1200

B4J Question Convert signed byte to int

Philip Prins

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stevel05

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Erel

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Philip Prins

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B4J Question Convert signed byte to int

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