[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 1832 SIGFOX Q&A Related Knowledge Base Posts -[SIGFOX] How do I manage the unique ID and Key?[SIGFOX] How do I do the Sigfox certification[SIGFOX] How good is the coverage, and where can I find a coverage map?