OsmoGTM900 » History » Version 1
laforge, 01/04/2024 02:42 PM
| 1 | 1 | laforge | {{>toc}} |
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| 3 | h1. OsmoGTM900 |
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| 5 | {{thumbnail(DSC00535.JPG,size=800)}} |
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| 7 | The OsmoGTM900 is an OSWH (Open Source Hardware) carrier board for the [[TI_Calypso_Chipset]] based [[Huawei GTM900-B]] GSM modem module. It contains |
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| 9 | * power supply circuitry |
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| 10 | * Analog audio connector |
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| 11 | * SIM slot (2FF sized) |
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| 12 | * reset and power-down buttons |
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| 13 | * A Raspberry Pi Pico implementing a dual-USB-UART bridge as well as additional control |
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| 14 | * (optional) audio codec intended to be used to interface the modem via USB-Audio Class device (requires firmware modification in the Pico firmware). |
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| 16 | h2. Hardware |
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| 18 | The schematics in EAGLE format can be found at https://gitea.osmocom.org/electronics/osmo-small-hardware/src/branch/master/gtm900-breakout |
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| 20 | A PDF rendering is available from https://gitea.osmocom.org/electronics/osmo-small-hardware/src/branch/master/gtm900-breakout/GTM900-breakout-schema_v3.pdf |
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| 22 | {{thumbnail(DSC00536.JPG)}} |
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| 23 | {{thumbnail(DSC00537.JPG)}} |
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| 26 | h2. Firmware |
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| 28 | The firmware source code project for the Pico can be found at https://gitea.osmocom.org/laforge/rp2040-playground/src/branch/master/osmo-gtm900 |
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| 30 | At this point we do not yet have automatic builds, but intend to publish them at the usual location for osmocom projects, beneath https://ftp.osmocom.org/binaries/ |
