[RIIM] What application payload length is supported for uplink and downlink packet? Around 84 Bytes. Last Update: September 29, 2021 September 29, 2021 683 RIIM Q&A Related Knowledge Base Posts -[RIIM] Can I buy a component of RIIM development kit individually?[RIIM] Do you need a programmer to program the devices? I suppose the development boards can be programmed with the USB?[RIIM] How many children can each node support?