According to the datasheet, pin C44 (WAKE_UP) is a mandatory connection. If you let it float, the pull-down will prevent the module from starting as far as I understand. On HL7692 this is GPIO13 with no special use. HL7692 uses DTR (actually \DTR) signal for this purpose, and HL7800 also specifies DTR as “wakes the module up”. Is the WAKE_UP mandatory if you’ve got \DTR routed? If it is mandatory, is it enough to connect WAKE_UP to DTR?
Debug UART0 in HL7800 is marked as mandatory as well, in HL7692 this is flat out NC. Do I really need this, can’t I do what is needed via UART1?
Why do I need the debug interface to start with, I’m accessing the firmware via AT commands and have no intent of modifying the firmware in any way or manner?