Mbed Cellular API for Generic GSM.

[yasir-khilji-64]

Description

So I've been trying to make the Mbed OS Cellular API with GSM Sim800/Sim808. But the mbed asserts network interface error.
mbed_app.json.txt
Serial Terminal Output:
mbed-os-example-cellular

Built: Jul 22 2019, 19:10:07
Establishing connection

++ MbedOS Error Info ++
Error Status: 0x80FF0144 Code: 324 Module: 255
Error Message: Assertion failed: iface
Location: 0x8002315
File: .\main.cpp+259
Error Value: 0x0
Current Thread: main Id: 0x200012C4 Entry: 0x800300B StackSize: 0x1000 StackMem: 0x20001A68 SP: 0x200029F4
For more info, visit: https://mbed.com/s/error?error=0x80FF0144&tgt=NUCLEO_F103RB
-- MbedOS Error Info --

Issue request type

[ ] Question
[ ] Enhancement
[x] Bug

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/MBOCUSTRIA-1496

[yasir-khilji-64]

Will anybody help us rectify the issue. We are on a really tight schedule here.

[AriParkkila]

@yasir-khilji-64 You are probably missing something like GENERIC_AT3GPP.provide-default in the mbed_app.json file. You need to change GENERIC_AT3GPP to actual Sim800's modem type.

[yasir-khilji-64]

I tried your suggestion. But same issue prevails.

[AriParkkila]

@yasir-khilji-64 Error Message: Assertion failed: iface indicates that no network interface was found, which typically means that you use NetworkInterface::get_default_instance() without a default modem defined. Please check that your BUILD/../mbed_config.h file defines, e.g. MBED_CONF_GENERIC_AT3GPP_PROVIDE_DEFAULT 1.

[yasir-khilji-64]

No it doesn't defines it.
#define MBED_CONF_GENERIC_AT3GPP_PROVIDE_DEFAULT 0

[yasir-khilji-64]

so now
MBED_CONF_CELLULAR_DEBUG_AT 1
GENERIC_AT3GPP_BAUDRATE 19200
GENERIC_AT3GPP_PROVIDE_DEFAULT 1
but i'm not seeing anything on the console now. Not MBED OS error message now.

[AriParkkila]

@yasir-khilji-64 You probably need to change GENERIC_AT3GPP_BAUDRATE to the same for the modem. Those cellular configs should not change console settings at all, maybe you could check that you haven't modified those such as platform.stdio-baud-rate.

[AriParkkila]

I think this issue can be closed due to the remaining problems, if any, are related to stdio-tracing and not to the original question about Cellular API.

[0Grit]

@trowbridgec

[0xc0170]

so now
MBED_CONF_CELLULAR_DEBUG_AT 1
GENERIC_AT3GPP_BAUDRATE 19200
GENERIC_AT3GPP_PROVIDE_DEFAULT 1
but i'm not seeing anything on the console now. Not MBED OS error message now.

Should be resolved, if any other, please use a forum for further questions