[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 2088 SIGFOX Q&A Downlink , Sigfox , Transmit Related Knowledge Base Posts -[SIGFOX] What if SIGFOX does not have a base station in my area?[SIGFOX] What is the competitive advantage of Radiocrafts vs other module providers?[SIGFOX] Are the modules certified for FCC and Australia are exactly the same (hardware-wise) and if so, how they are switched to work under FCC or Australian standards