- Table of contents
- OsmoGTM900
OsmoGTM900¶
The OsmoGTM900 is an OSWH (Open Source Hardware) carrier board for the TI_Calypso_Chipset based Huawei GTM900-B GSM modem module. It contains
- power supply circuitry
- Analog audio connector
- SIM slot (2FF sized)
- reset and power-down buttons
- A Raspberry Pi Pico implementing a dual-USB-UART bridge as well as additional control
- (optional) audio codec intended to be used to interface the modem via USB-Audio Class device (requires firmware modification in the Pico firmware).
Hardware¶
The schematics in EAGLE format can be found at https://gitea.osmocom.org/electronics/osmo-small-hardware/src/branch/master/gtm900-breakout
A PDF rendering is available from https://gitea.osmocom.org/electronics/osmo-small-hardware/src/branch/master/gtm900-breakout/GTM900-breakout-schema_v3.pdf
Firmware¶
The firmware source code project for the Pico can be found at https://gitea.osmocom.org/laforge/rp2040-playground/src/branch/master/osmo-gtm900
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/
Updated by laforge 4 months ago · 1 revisions