[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 2179 SIGFOX Q&A Downlink , Sigfox , Transmit Related Knowledge Base Posts -[SIGFOX] Is the sensitivity a function of the chipset or is it something we can enhance with an LNA if necessary?[SIGFOX] How can Radiocrafts help us designing a SIGFOX unit?[SIGFOX] What is the advantage of using the Radiocrafts RC16xxxx-SIG module?