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u-blox / ubxlib

Portable C libraries which provide APIs to build applications with u-blox products and services. Delivered as add-on to existing microcontroller and RTOS SDKs.
Apache License 2.0
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MCC/MNC list #178

Closed alexmaron81 closed 4 months ago

alexmaron81 commented 6 months ago

I would like to use the module in Thailand and have received the following list of providers from my operator. What is the smartest way to test the dial-in until the module has dialed in successfully?

True Move Company Ltd. (MCC: 520, MNC: 00, 04, 99): 2G: 900 und 1800 MHz 3G: Band 1 und 5 4G: Band 1, 3, 8 und 41

Advanced Wireless Network Company (AIS) (MCC: 520, MNC: 01, 03) 2G: 900 and 1800 MHz 3G: Band 1 and 8 4G: Band 1, 3, 8 und 41

True Move H Universal Communication (MCC: 520, MNC: 04) 2G: 900 und 1800 MHz 3G: Band 1 4G: Band 1, 3, 8 und 41

dtac TriNet Co., Ltd. (MCC: 520, MNC: 05) 3G: Band 1 und 5 4G: Band 1, 3, 28 und 40

RobMeades commented 6 months ago

Hi Alex. The simplest approach would be to call uDeviceOpen() on the cellular device as normal and then, rather than calling uNetworkInterfaceUp() (which uses automatic network selection), you would call uCellNetConnect() with the pMccMnc field set to point to the string giving the MCC/MNC of one of the networks (e.g. "52000" for the first TrueMove Company Ltd MCC/MNC), wait for the connection to succeed or fail, if it succeeds then call uCellNetDisconnect(), then repeat for the next MCC/MNC (e.g. "52004" for the next True Move Company Ltd. MCC/MNC).

It might be worth doing a network scan first to see what networks are actually available at that location (see the lte_cfg_main.c example for how to do that, which also shows you how to configure the supported network bands, should you need it) in order to avoid wasting time trying to connect to networks which just aren't visible.

Since both uCellNetScanGetFirst() and uCellNetScanGetNext() return the MCC/MNC string anyway, you could just try each one in turn.

alexmaron81 commented 6 months ago

Hi Rob, I tried the lte_cfg_main.c example and get this:

AT+UMNOPROF?

+UMNOPROF: 100

OK AT+UGPRF?

+UGPRF: 2,0,""

OK AT+CFUN=4

OK

+CEDRXP: 4,"0010" U_CELL_CFG: getting band mask for RAT 10 (in module terms 0). AT+UBANDMASK?

+UBANDMASK: 0,524420,1,524416

OK U_CELL_CFG: band mask for RAT 10 (in module terms 7) is 0x0000000000000000 0000000000080084.

Band mask for RAT CAT-M1 is 0x0000000000000000 0000000000080084.

Setting band mask for RAT CAT-M1 to 0x0000000000000000 000000400b0f189f...

I (28269) CELL: >>>>>>>>>>SARA is not alive<<<<<<<<<< U_CELL_CFG: setting band mask for RAT 10 (in module terms 0) to 0x0000000000000000 000000400b0f189f. AT+UBANDMASK=0,275063445663,0

ERROR

Unable to change band mask for RAT CAT-M1, it is likely your module does not support one of those bands.

U_CELL_CFG: getting band mask for RAT 10 (in module terms 0). AT+UBANDMASK?

+UBANDMASK: 0,524420,1,524416

OK U_CELL_CFG: band mask for RAT 10 (in module terms 7) is 0x0000000000000000 0000000000080084.

Band mask for RAT CAT-M1 is 0x0000000000000000 0000000000080084.

AT+CFUN?

+CFUN: 0

OK AT+CFUN=1

OK

+CEDRXP: 4,"0010","0010","0001" AT+COPS=?

+COPS: (1,"262 01","262 01","26201",0),(2,"262 01","262 01","26201",7),(1,"262 03","262 03","26203",0),(1,"262 02","262 02","26202",0),(1,"262 02","262 02","26202",7),(1,"262 03","262 03","26203",7),,(0,1,2,3,4),(0,1,2)

OK AT

OK AT+CFUN=0

OK

+CEDRXP: 4,"0010"

6: network: 26201

I (63329) CELL: >>>>>>>>>>SARA is not alive<<<<<<<<<<

4: network: 26201

3: network: 26203

2: network: 26202

1: network: 26202

0: network: 26203

U_CELL_NET: preparing to register/connect... AT+CREG=2

OK AT+CGREG=2

OK

RobMeades commented 6 months ago

That looks good: obviously you might need to adjust the band-mask to be correct for your module but you have successfully performed a search and returned a list of MCCs/MNCs, now you would need to try registering with each of them in turn.

alexmaron81 commented 6 months ago

why are there duplicates in the list?

RobMeades commented 6 months ago

Different RATs:

(1,"262 01","262 01","26201",0), (2,"262 01","262 01","26201",7) ^ ^ 2G LTE

RobMeades commented 6 months ago

Hi Alex: are you OK with this now?

eeFLis commented 6 months ago

Hi Rob Sorry for the intermediate question but why not add pMccMnc to uNetworkCfgCell_tso that uNetworkInterfaceUp() can be used? This way pMccMnc can be passed to uCellNetConnect in uNetworkPrivateChangeStateCell().

RobMeades commented 6 months ago

Hi @eeFLis and happy new year to you: that's an excellent idea, I will add it to the TODO list.

alexmaron81 commented 6 months ago

Hi Alex: are you OK with this now?

Hi Rob, I'll tackle the task a little later. I'm currently working on another problem (not ubxlib).

eeFLis commented 6 months ago

Hi @eeFLis and happy new year to you: that's an excellent idea, I will add it to the TODO list.

Thank you, a happy new year to you too

RobMeades commented 5 months ago

@eeFLis: now done in commit https://github.com/u-blox/ubxlib/commit/41349f324ed52de37ade97f8de638b4ab1549f9a.

RobMeades commented 4 months ago

Hi Rob, I'll tackle the task a little later. I'm currently working on another problem (not ubxlib).

Hi Alex: do you still need this one open?

RobMeades commented 4 months ago

I'm going to assume this can be closed, please re-open (or open another issue) if there is more to discuss.