Good afternoon. This is Michael from Robolink.

Based on what you've described in an email I received, it would appear that the CoDrone is not being recognized by your computers, which would indicate that there is either a problem with the USB connection, or there is a problem with the CoDrone BLE board itself. You've said you've used multiple computers and USB cables, which rules out a number of causes, but there are still a few more troubleshooting suggestions I'd like to offer, if you don't mind:

Basic suggestions:

1. Are you using USB 3.0 ports or a USB hub to connect to the CoDrone? Sometimes those can be incompatible with hardware.

Advanced suggestions:

1. On the Mac, you may need to install the legacy version of the driver before the board can be recognized. When mounting the .DMG file, one of the folders that will appear is called "Legacy MacVCP Driver". Install the driver from this folder.
2. Does the computer you're using respond to the CoDrone board when it's plugged in (sound, notifications, etc.)? If you're on Windows, you can unplug the CoDrone and go into the Device Manager (Windows Key + R > Type "devmgmt.msc" > OK). When you plug in the CoDrone while Device Manager is open, it should refresh and a new option should appear under the section "Ports" as "Silicon Labs CP210x USB to UART Bridge". If it appears in Device Manager as a generic "USB Device", then that could mean that the CP210x driver was not installed properly.
3. What LED color/pattern appears on the CoDrone BLE board when it's plugged in? Normal combinations are a flashing yellowish light, or a flashing red light. Any other color/pattern could be an indicator that you have a defective board.

Regardless, it would be best to schedule a video call with one of our regular CoDrone support staff. You should be receiving an email regarding this shortly.

Good evening, Parsa. After discussing the problem further with my coworkers, it would perhaps be best if we attempt to troubleshoot the problem via video call. If it's not too inconvenient, would you like to schedule one? Available times are Monday to Thursday, starting from June 20 onwards.

Good evening, Parsa. After running some tests, there may be several reasons why your drone is no longer flying properly. Although you did mention changing the motors, I'd still recommend checking this video, which covers some common issues, including motor and propeller orientation, and hardware connections.

Other reasons for why the motors may not be functioning properly may be due to the battery itself; it's possible that your battery may not be running at maximum capacity, which can be determined by seeing if it has started to puff out. You can test this by removing the battery and placing it on a flat surface, sticker-down. Press down on one end of the battery and see if it rocks back and forth. If so, your battery has started to puff out, and thus the drone is unable to achieve maximum power.

Please let us know which of these methods you tried, including which version of the CoDrone library you are using, and we would be assist to help you further.

Good morning, mrsdann. There can be a number of reasons why the motor is not functioning properly. As RBass noted, there may be some debris that is obstructing the motor. Further troubleshooting methods are outlined in this video here. Let me know if this helps!

Good morning, Ryan. In the event of a broken part, we would first need to determine if we can fix it. If a part cannot be fixed, we'd be happy to send you a replacement for a small fee.