[RIIM] How many GPIOs does the Border Router have? 9 GPIOs. Last Update: September 29, 2021 September 29, 2021 1151 RIIM Q&A Related Knowledge Base Posts -[RIIM] Do I need an external pull-up resistor on the SPI CS (chip Select)?[RIIM] What is the latency from sending a message until it is received? Uplink? Downlink?[RIIM] How can I use Pin 4, the BSL pin?