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HMP240

User's Guide M210300en

5.4.3 Operating the transmitter via the serial bus

5.4.3.1 Setting the serial interface

SMODE xxxx<cr>

xxxx = STOP, RUN or POLL

In STOP mode: measurements output only by command, all commands can be

used

In RUN mode: outputting automatically, only command S can be used

In POLL mode: measurements output only with command SEND. When in

POLL mode, the output mode is changed as follows:

OPEN aa <cr>

SMODE xxxx<cr>

aa = address of the transmitter

xxxx = STOP, RUN or POLL

The OPEN command sets the bus temporarily in STOP mode so that the

SMODE command can be given.

Example:

>SMODE STOP <cr> setting STOP mode

Serial mode : STOP

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