[RIIM] What application payload length is supported for uplink and downlink packet? Around 84 Bytes. Last Update: September 29, 2021 September 29, 2021 176 RIIM Q&A Related Knowledge Base Posts -[RIIM] How many children can each node support?[RIIM] Do I need an external pull-up resistor on the SPI CS (chip Select)?[RIIM] Can a child node send a broadcast message?