I am currently testing several LC86L modules (specifically marked as LC86LICMD Q1-A7724) for a new tracking project. During our field tests and long-term logging, we have encountered some unexpected glitches and intermittent drops in the NMEA serial output. Sometimes the module seems to randomly restart or stop outputting valid sentences under conditions where it should work perfectly fine.
To isolate the issue and determine if this is a hardware integration problem on our custom PCB or a software bug in this specific firmware release, I would like to test the modules with an older firmware version.
Could you please provide me with previous older firmware files (.bin) for this module and the latest QFlash tool so I can downgrade and test if the stability improves?
Company Name: None, I am an individual hobbyist / maker.
R&D location(Country): Italy
From where you bought Quectel module?: I purchased 10 units on AliExpress about 8 months ago. Unfortunately, the original listing and the store have since been deleted, so I cannot provide the purchase link.
Project name: Currently unnamed (early prototyping phase). Let’s call it “DIY Outdoor Sports Tracker”.
Estimated Annual Units: 0 (This is a non-commercial DIY project for my friends and me).
Project timeline: I am currently building and testing the first prototypes.
To give you more context on why I need an older firmware: I am building a DIY GPS tracker for an outdoor sports orienteering game. The device uses an ESP microcontroller to record GPS tracks to memory, which we download after the game to determine the winner.