C030 SARA-R412M: Send custom AT commands from iface (CellularContext)


I use a simple code to connect the device with the Mbed OS network interface (cellular context):

iface = CellularContext::get_default_instance();
iface->attach(callback(this, &Cellular::cbCellular));

nsapi_error_t retcode = NSAPI_ERROR_OK;
retcode = iface->connect();

How can I use the iface to send custom AT commands to the device, or how can I use the Mbed-OS integrated AT command handler to do that? Any idea where I can found some example code?