[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 974 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] Can I have a trial subscription to test my application?[SIGFOX] Why should I use SIGFOX instead of other communicational protocols?