How to manually instantiate a new cellular connectivity?

Mbed OS
1

In the official example , all settings like pin, apn, username and password are configured via mbed_app.json, then the instance is get by calling:

ec25 = CellularContext::get_default_instance();

This works, but has the downside are: 1) sensitive information like username and password are included in source which is typically not a good practice; 2) those settings cannot be changed on the fly.

So my question is, can we instantiate a cellular connectivity like we do with ethernet or Wifi/ESP8266? Something like the following lines of code. If yes, we will have a lot more flexibility.

ESP8266Interface wifi(WIFI_RADIO_TX, WIFI_RADIO_RX, false, WIFI_RADIO_RTS, WIFI_RADIO_CTS, WIFI_RADIO_RST);
// or
EthernetInterface eth;

Thanks in advance.

2

you can change APN on the fly with

ec25->set_credentials();

as well as PIN

ec25->set_sim_pin()

I made a template while ago, you can get inspired GitHub - pilotak/mbed-cellular-boilerplate: Mbed uBlox cellular basic with reconnect

3

I briefly went through source code of EC25, it seems setting up pins on the fly is not possible as of now.

4

What is the point setting up the pins on the fly? modem is/should be hard wired on the board

5

Not necessarily a moot. 1) If the same PCB are used in two models of product, once with EC25 and the other one without. Then starting UART TX as input can be used as a mechanism to detect if a module is installed. 2) I generally try to avoid changes/configurations in the json file. Whenever any minor changes happen there , it means minutes of compilation time.