[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 1469 SIGFOX Q&A Related Knowledge Base Posts -[SIGFOX] Can Radiocrafts design a SIGFOX unit for us?[SIGFOX] Can I have a trial subscription to test my application?[SIGFOX] What is the advantage of using the Radiocrafts RC16xxxx-SIG module?