Serial LTE modem master - automatic data mode exit by specifying number of bytes to be sent

[Michal Mühlpachr]

In NCS v1.6.99 the HEX data format is removed from data send and receive commands (socket, udp/tcp cli/srv), only ascii and data mode is supported.

In case of binary data, there is required double silence both before and after the termination command of data mode.

CONFIG_SLM_DATAMODE_SILENCE is in seconds, so minimal 2s to exit data mode.

That behavior wastes energy by extending wakeup time for battery operated devices.

Proposal for #XSEND (and other send commands) - add optional parameter for data length, exit data mode after that many bytes.

Examples:

AT#XSENDTO="test.server.com",1234,,4
test
#XSEND: 4
OK

AT#XSENDTO="test.server.com",1234,"data"
#XSEND: 4
OK

It would be also convenient to be able to get data from #XRECVFROM asynchronously like in #XUDPCLI because minimum timeout is 1s
#XRECVFROM: <size>,<ip_addr>,<port> 
Example:
#XRECVFROM: 4,"10.0.0.1",1234
data

Thank you.

[Jun Qing ZOU]

Hi Michal, we want to give MCU full control of exiting data mode so automatic exiting based on sending size is currently not our intention.

Please enable CONFIG_SLM_CUSTOMIZED and implement by your own.

[Michal Mühlpachr]

MCU has full control of exiting data mode because size of data is specified.

Why would you like to waste energy for battery operated device to spend 2s just to proceed with explicit data mode exit procedure ?

[Michal Mühlpachr]

Without data size provided in AT#XSENDTO there is still possibility to wait for explicit data mode exit procedure, so feature will not reduce the functionality, it will juts allow more energy efficient handling.