Determining EZ-Serial Firmware Version Setup See here to determine the ID of the PUART COM Port. Issue Query Firmware API Command Use the “system_query_firmware_version” /qfv or “system_reboot” /rbt commands to determine the EZ-Serial Firmware Revision. Both commands are illustrated below using a terminal program connected to the PUART. /qfv @R,002C,/QFV,0000,E=01040C0C,S=03010000,P=0104,H=F1 The E field is the EZ-Serial Firmware Revision. In this case it is 01040C0C in hex. This equates to 1.4.12.12 /rbt @R,000A,/RBT,0000 @E,0076,BOOT,E=01040C0C,S=03010000,P=0104,H=F1,C=00,A=FF247F484E50,F=EZ-Serial-VELA_IF820_INT V1.4.12.12 Sep 11 2023 10:17:21 The F field is the EZ-Serial Firmware Revision string. This is a more friendly representation of the firmware version.