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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2022/09/21 13:39:22 UTC
[GitHub] [incubator-nuttx] vshymanskyy opened a new issue, #7153: Make use of multiplexing (GSM 07.10) protocol for PPPD and GSM modules
vshymanskyy opened a new issue, #7153:
URL: https://github.com/apache/incubator-nuttx/issues/7153
While the PPPD example works, one needs to exit PPP mode (possibly power-resetting the modem) to send
additional AT commands or read NMEA information from the GSM modems, which proves difficult and requires a lot of task handling.
[GSM 07.10 protocol](https://www.etsi.org/deliver/etsi_ts/101300_101399/101369/07.01.00_60/ts_101369v070100p.pdf) is a suggested way to handle this. It allows multiplexing (AT+CMUX) several logical streams of data over a single uart, i.e. you can have multiple virtual serial ports for:
- AT commands
- PPP
- NMEA (GPS)
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[GitHub] [incubator-nuttx] acassis commented on issue #7153: Make use of multiplexing (GSM 07.10) protocol for PPPD and GSM modules
Posted by GitBox <gi...@apache.org>.
acassis commented on issue #7153:
URL: https://github.com/apache/incubator-nuttx/issues/7153#issuecomment-1253739348
Hi @vshymanskyy AFAIK NuttX doesn't have PPP serial multiplexing, you need to implement the mux protocol. This should be a nice feature to have. If you need help to implement and test it, please let me know.
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[GitHub] [incubator-nuttx] vshymanskyy commented on issue #7153: Make use of multiplexing (GSM 07.10) protocol for PPPD and GSM modules
Posted by GitBox <gi...@apache.org>.
vshymanskyy commented on issue #7153:
URL: https://github.com/apache/incubator-nuttx/issues/7153#issuecomment-1253788799
@acassis I'm currently evaluating multiple platforms with PPP support, so I created this issue in process of documenting my findings. I have no immediate need for mux support in NuttX.
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