String ASCII move as HEX to string table

PAC Project
1

Hi all,

I am working on converting my string table values into hex format and then pushing them back into a string table for further data conversion. Here is the raw string received from a wireless sensor via serial communication:

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, Once I click the format from ascii to hex, I am able to see the correct data needed for parsing:
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Does anyone know how to convert a string table into a hex table or a string hex table? I’ve looked through the available commands but couldn’t find anything that works for this purpose. Any suggestions or guidance would be greatly appreciated!

2

Searching the forums for ‘hex’ gives some good results you might find helpful.

But in short, I would have a loop that simply spins through your table using the unpack command.

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3

How did you get the data in the table that way? It will be easier to work with (and to use the Unpack command) if it was in a single string variable.

Are you sure you need to convert it to ASCII Hex prior to your end result? If you can share a bit more on what you need extracted, I/we can then give more specific advice.

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4

The string table width is set to 1. This allowed me to arrange the data in the desired order. I can receive the data as a string, but converting it from the table seems much easier than parsing it from a single continuous string.

For example, here’s how the data would be parsed:

Raw Data:
7E 00 19 90 00 13 A2 00 41 A2 70 EA FF FE C2 7F 00 05 03 FF 01 00 01 00 0D 7A 0A 56 4F

Payload:
7F 00 05 03 FF 01 00 01 00 0D 7A 0A 56

Field Breakdown:

  • 7F – Header
  • 00 – Node ID
  • 05 – Firmware Version
  • 03, FF – Battery Voltage
  • 01 – Transmission Counter
  • 00, 01 – Sensor Type
  • 00 – Reserved
  • 0D, 7A – Humidity = (0D * 256) + 7A = 3450 (DEC) / 100 = 34.50%
  • 0A, 56 – Temperature = (0A * 256) + 56 = 2646 (DEC) / 100 = 26.46°C
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5

Keep the payload binary, don’t convert to a hex string.

Using a single string will be easier - treat it as an array of bytes:

Here is the difference:

//As a string
fHumidity = (sPayload[24] * 256 + sPayload[25]) / 100.0;

//As a string table
fHumidity = (GetNthCharacter(stPayload[24], 0) * 256 + GetNthCharacter(stPayload[25], 0)) / 100.0;
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