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CDC ACM GET LINE CODING request in Linux

Posted by on Ago 18, 2017 in development, kernel, Linux, USB |

Recently I was looking for a way to verify if CDC ACM GET LINE CODING request was working properly on a specific modem, since a customer was reporting an issue with it. In document “USB Communication Class Subclass Specification for PSTN Devices” GET LINE CODING is described as following (paragraph 6.2.2, Table 11): “Requests current DTE...

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How to easily test RIL_REQUEST_OEM_HOOK_RAW in AOSP

Posted by on Feb 8, 2017 in Android, AOSP, development, RIL |

Recently I had the need to develop a custom behavior in AOSP for one of my modems: on the native side it was quite clear I had to use RIL_REQUEST_OEM_HOOK_RAW, but how to easily test this on the Java side? RIL_REQUEST_OEM_HOOK_RAW in ril.h Taking a look at native RIL main include file hardware/ril/include/telephony/ril.h we can find the description for the...

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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...

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Telit GE910 support added into ModemManager

Posted by on Ott 23, 2016 in Android, AOSP, development, kernel, Linux, ModemManager, RIL, Telit |

A few weeks ago Telit GE910 support has been added into ModemManager (mm-1-6 branch and master). The GE910 is a 2.5G cellular module (4 Bands GSM | GPRS: 850 / 900 / 1800 / 1900 MHz, GPRS class 10) designed to be fully compatible with Telit’s HSPA and EV-DO products, using the same connector-less xE910 unified form factor family. Telit GE910 is avaliable...

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How to enable the PUK insertion panel in AOSP RIL

Posted by on Set 25, 2016 in Android, AOSP, development, RIL |

I’m moving forward on my native AOSP RIL library development: after having solved the Pin Lock State issue, I’m now facing a problem with PUK insertion. When the SIM requires PIN insertion, after all the PIN retries have been consumed, the GUI keeps staying in PIN request mode: no PUK panel is shown, so it is impossible to unlock the SIM card....

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How to manage properly the Pin Lock State in AOSP RIL

Posted by on Set 18, 2016 in Android, AOSP, development, RIL |

I’m currently developing the native AOSP RIL library (Android 5 and 6) for a modem of mine. While adding the code to manage the Pin Lock State I faced a puzzling problem: no matter what I wrote in the native RIL library, the Pin Service State in the Settings GUI was always wrong. Time to go through the Java code… AOSP RIL and the wrong Pin Lock...

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