Important note: Full documentation and changelog are maintained on Github: https://github.com/vd-rd/hw_cape_gsm
Open hardware module for providing communications support via GPRS to embedded projects. The module can use any 2G network operating in the 850/900MHz or 1800/1900MHz spectrum. The modem features an audio link for voice calls and a TCP/IP stack for data transfer.
3.5mm jack with microphone
status LED indicator
two serial ports ( ATcommands on main serial port and support for daisy chaining a second UART device)
standard u.FL connector for antenna
standard ApolloIoT expansion header