10 years, 9 months ago.

ppp connection with Ublox C027

Hi All,

we are trying to get our Ublox Lisa-U200 modem. Both on a developer board and on the C027. We are using the Vodafone M2M SIM which works fine on our Huawei modems. We have got the bug down to the PPP negotiation.

From a terminal like screen or cutecom we are initiating the AT command to connect. The idea being that the PPP negotiation will be done by the by software running on the mbed. On the Huawei we get the 'CONNECT' message. The Ublox seems to be trying to do the PPP negotiation on the modem - and failing. We think this is because the Ublox modem is trying to do the PPP negociation.

Below is the output from the console:

at

OK

atdt*99#

CONNECT
~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~~\0xff}#\0xc0!}!}!} }4}"}&} } } } }%}&+},X\0xfb}'}"}(}"Z}(~
NO CARRIER

Does anyone know why the modem is returning output on the ATDT *99# shown above?

Kind regards, Nicholas.

Question relating to:

Last updated: 27 Aug 2020

u-blox C027

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