[SIGFOX] How many bytes can I transmit in one message from my device? You can send up to 12 bytes per message from the device (uplink). Last Update: August 8, 2017 December 5, 2016 989 SIGFOX Q&A Related Knowledge Base Posts -[SIGFOX] How do I do the Sigfox certification[SIGFOX] Can I have a trial subscription to test my application?[SIGFOX] Please kindly help to confirm if we could use the RC1682-SIG / RC1692HP-SIG to operate with AMR SOC as a Gateway product?