[SIGFOX] How many bytes can I transmit in one message to my device? You can send up to 8 bytes per message to the device (downlink). Last Update: August 8, 2017 December 5, 2016 1056 SIGFOX Q&A Downlink , Sigfox , Transmit Related Knowledge Base Posts -[SIGFOX] What if SIGFOX does not have a base station in my area?[SIGFOX] What does P1 and P2 certification means?[SIGFOX] Please kindly help to confirm if we could use the RC1682-SIG / RC1692HP-SIG to operate with AMR SOC as a Gateway product?