[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 2116 SIGFOX Q&A Related Knowledge Base Posts -[SIGFOX] How do I manage the unique ID and Key?[SIGFOX] What is a SIGFOX zone?[SIGFOX] Is my data secure and protected?