[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 1345 SIGFOX Q&A Downlink , Sigfox , Transmit Related Knowledge Base Posts -[SIGFOX] “We are using the RC1692 Sigfox modules. Is it possible for us to encrypt the payload from the device to the tower, and from the tower/server to the user. As there are only 8 bytes in the upload packets, we feel this will not provide enough entropy to do our own encryption.”[SIGFOX] Your spec sheet for RC1692HP-SIG has changed from VCC_PA to 3.6V maximum whene it was earlier 5V. What effect will this have?[SIGFOX] What is SIGFOX?