[RIIM] What application payload length is supported for uplink and downlink packet? Around 84 Bytes. Last Update: September 29, 2021 September 29, 2021 693 RIIM Q&A Related Knowledge Base Posts -[RIIM] Does RIIM firmware support frame fragmentation?[RIIM] Is there a relationship between network size and data upload interval?[RIIM] Do I need an external pull-up resistor on the SPI CS (chip Select)?