Send data back to the source

It is possible to send data back to the source in a few ways.

Sending data back using the UI

In the 'Control' tab, there is a send button and a text field to provide the data to send.

The text can contain escape command, if you need to send a newline or another special character.

Supported escape commands:

• <cr>: "\r" (carriage return)
• <nl>: "\n" (new line)
• <tab>: "\t" (tab)
• <esc>: "\x1b" (escape)

• <ctrl-X>: ord(X)

• E.g.: '<esc>restart<cr><nl>' ==> \x1brestart\r\n

Use PLX-DAQ command "CELL,GET"

With the PLX-DAQ mode, you can let the data source query for a cell value by sending the CELL,GET command.

  Serial.println("CELL,GET,H1");
  int value = Serial.readStringUntil('\n').toInt();

Use sheet cells when in streamer mode

In streamer mode, by choosing CSV or JSON in the 'Protocol' tab, you can define an output range of cells. Any change in values in this range will send the values back to the data source.

For CSV mode this is done by concatenating the values in the range by a ',' , ending with a newline and sending this to the data source.

For JSON mode this is send back as a JSON line defined in the JSON mapping config.

{
    "output":
        {
            "range": "I2:I3",
            "mapping": [
                "interval",
                "unit"
            ]
        }
}