Crea sito

Paldan time

Just write it!

Navigation Menu

cdc-wdm support now added in AOSP Hikey

Posted by on Set 11, 2017 in Android, AOSP, Linux, MBIM, QMI, USB |

Recently I was trying to use my QMI and MBIM based modems in AOSP, with no luck: no cdc-wdm device was available in /dev/ after modem plugging, apparently without any kernel error. First guess was lack of cdc-wdm device driver in my kernel build, but, after checking, that was not the issue, since the network interfaces of the modem were properly created....

Read More

Telit plugin improvements in ModemManager

Posted by on Giu 26, 2017 in kernel, Linux, MBIM, ModemManager, Telit | 1 comment

In the past few months a lot of development happened recently in ModemManager, both new features and bugfixings. As usual I will mainly focus on the changes that affect Telit plugin, but I suggest to take a look log at the whole git log since there is a lot more. Telit plugin new features A short list of new features: Telit RS232 modem supports, mandatory...

Read More

Telit LE922 rmnet and MBIM support added in Linux kernel

Posted by on Dic 29, 2016 in development, kernel, Linux, MBIM, ModemManager, Telit |

Telit LE922 rmnet and MBIM support has been recently added in Linux kernel. Telit LE922 product series key features: LTE data rates in 4G networks up to 300 Mpbs downlink and 50Mbps in uplink. Carrier aggregation up to 40MHz bandwidth, both intraband and interband, and MIMO 2×2 Multiple regional variants to support the various bands (FDD/TDD) and band...

Read More

Using Wireshark + usbpcap for debugging MBIM modem issues

Posted by on Giu 11, 2016 in MBIM, Windows |

Recently I was asked to explain why an MBIM based modem connected to a Windows 7 host was sometimes not able to setup a data connection after a Suspend (S3) / Resume transition. Since firmware modem traces could not be collected, I asked to collect usbcap logs during the issue, in order to leverage Wireshark capabilities for debugging MBIM modem issues....

Read More