Question about using a cellular modem with NetXDuo about netxduo HOT 7 CLOSED

Do you know whether the cellular modem you used support AT mode only or PPP mode? If PPP mode is supported, you will need to develop a PPP driver for data I/O. But the management of cellular initialization or connectivity management is out of the NetX Duo scope.

from netxduo.

Do you know whether the cellular modem you used support AT mode only or PPP mode? If PPP mode is supported, you will need to develop a PPP driver for data I/O. But the management of cellular initialization or connectivity management is out of the NetX Duo scope.

Both modes are supported and I plan to use AT mode first then use PPP mode later so I will have more flexibility to use components in NetX Duo. Before call NetX Duo api, I have done the initialization (cellular hardware, APN settings and registered on the network). I am thinking I should implement some apis like

• Cellular_CreateSocket()
• Cellular_SocketConnect()  
• Cellular_SocketSend() 
• Cellular_SocketRecv() 
• Cellular_SocketClose()

and handle URC events.

from netxduo.

To use AT mode, the TCP/IP stack is provided by modem itself. We have a special version of NetXDuo and driver. You can take a look at https://github.com/azure-rtos/samples/releases/download/v6.1_rel/Azure_RTOS_6.1_STM32L4+-DISCO_IAR_Samples_2020_10_10.zip
You will need to port netxduo/common/nx_wifi.c for your modem.

To use PPP mode, you can follow the PPP sample and overwrite ppp_0_serial_byte_output and call nx_ppp_byte_receive when data are received. https://github.com/azure-rtos/netxduo/blob/master/samples/demo_netx_ppp.c

from netxduo.

Thanks, Tiejun, I think it is a good starting point

from netxduo.

... you will need to develop a PPP driver for data I/O.

Just a clarification, do you mean by "driver" just the glue code which links PPP and serial port? Because I thought that the PPP network driver itself is part of NetXDuo.

from netxduo.

You are correct.

from netxduo.

Feel free to reopen it if you have more questions.

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