what is the range of values in 2 bytes, Data resolution per bit is 0.01 signed?

Question

Analog Input is 2 bytes in size, with Data Resolution per bit of 0.01 Signed. what is the possible range of values for Analog input?

I am trying to understand this data format used for transporting data over a LPWAN....what is the range constraint of possible values for Analog Input and Output..

Type    IPSO    LPP     Hex     Data Size   Data Resolution per bit
Analog Input    3202    2   2   2   0.01 Signed
Analog Output   3203    3   3   2   0.01 Signed

https://github.com/myDevicesIoT/cayenne-docs/blob/master/docs/LORA.md

Answer 1

Here's a solution with a few assumptions.

The first assumption being that your number is stored in two's complement form. Most signed numbers are stored in two's complement form for various reasons. Unless you believe otherwise it's pretty safe to assume that's the format the analog to digital converter uses.

The second assumption is that the units are correct. 0.01 units of resolution per bit. The final answer seems strange so please provide additional information in the future.

To answer the first part of your question, your number is 2 bytes long, that's 16 bits. The range of a 16 bit two's complement number is from -32768 to 32767. Using 0.01 units to represent a single bit that gives you a range of -327.68 to 327.67.