[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 2071 SIGFOX Q&A Related Knowledge Base Posts -[SIGFOX] Can we recover historical data (300 bytes) on request (if needed)?[SIGFOX] How do I do the Sigfox certification[SIGFOX] Is my data secure and protected?