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![architectural diagram](https://g.gravizo.com/svg? @startuml

frame apps { [dialer] [messaging] [uNav] }

frame services { [ofono] [locationd] [mir] }

frame hardware { [SIM908] [PiHAT] [PiTFT] }

[dialer] ..> [ofono] : dbus [messaging] ..> [ofono] : dbus [uNav] ..> [locationd] : dbus [ofono] ..> [SIM908] : UART [locationd] ..> [SIM908] : UART [mir] ..> [PiTFT] : SPI, GPIO [mir] ..> [PiHAT] : I2C

@enduml)