Having difficulty with UART-command/SPI-data configuration. I get a prompt on the UART connection after power-up, but cannot enter commands? What do I do? June 19, 2015 20:08 GainSpan FAQ HelpDesk Technical FAQs Software, Modes of Operation, Interfaces, Modules, Code, Data Rates, etc. The module needs to see the presence of a SPI connection before responding to commands on the UART.