I'm attempting to run some of the sample .py applications on an FXR90. I started with the GPI-Message sample application provided by zebra and use FX-Package to generate the .deb file. I am able to uplad and start the application from the FXR90 dashboard/settings - but I can't tell if it is working or not. Where should these ZIOTC_MSG_TYPE_DATA messages appear? Is there a way to debug using log files or anything? How do I access log files for debugging? Ultimately I want to start the reader when a GPI PIN goes low. I assume I'll use ZIOTC_MSG_TYPE_CTRL to send a message that will start the inventory/tag reads - but I can't seem to find exactly the message that needs to be sent. I'm assuming that I will do something similar to how I send the message over the MQTT command topic. ({"command": "start", "command_id": "16266718797272556", "payload": {}}). But again...I'm not sure exactly how to the message should be formed in ZIOTC...it would help significantly if I could tell if the applications were working in some sort of debug mode. Help is VERY appreciated.

Thanks!