I've tried all options that others have said in other forums like:
-uploading and resetting it
-uninstalling com drivers
-using a data cable(I'm 100% sure I'm using the right cable)
the power light is on but some people say when they press the reset button the L button flashes, mine doesn't do that, when I press reset nothing happens. Also only COM1 is available
use double reset to activate the bootloader and upload a working sketch
it now works but when i try to use with usb host shield it stop detecting the leonardo. i already soldered the 3 points on the usb host shield
before i plug in the usb host shield the leonardo is working fine and is being detected but when I plug in the USB shot shield the Leonardo stop being detected and the COM port disappears
@mikemikeu, please do not cross-post. Threads merged.
The first step above determines if there is something wrong with the current code.
The second step determines if you can upload.
The third step determines if there is something wrong with the shield (and or your soldering).
What does that mean? I looked at https://docs.arduino.cc/retired/shields/arduino-usb-host-shield/ and don't see anything that needs to be soldered. What did you solder to the shield?
If step 3 above failed, removed whatever you've soldered.
for 1 and 2 the board is being recognized but disappears once I connect USB host shield
for the USB host shield Im using one from amazon and i needed to solder the 3.3V and the 5V pins for power
Please post a link.
Make sure your soldering is OK. Does the power LED on the Leonardo stay on when you connect the shield.
The power light stays on but the L light starts to fade away
I'm not sure if you need to solder the 3.3V blob.
I'm sorry but I don't think that I can help further Did the board come with a manual?
It looks like it is a clone of the Circuits@Home USB Host Shield. The manual for that shield is here:
https://web.archive.org/web/20230409133424/https://chome.nerpa.tech/usb-host-shield-hardware-manual/
About the "3.3V" and "5V" jumpers, that manual says:
2 solder jumpers marked “5V” and “3.3V”. They are used for different power configurations. The configuration shown, when both jumpers are closed, is suitable for official Arduinos, such as UNO, Duemilanove, Mega and Mega 2560.
So it sounds like having those both shorted is fine.
@mikemikeu remove the shield from the Leonardo board and do a careful visual examination of both sides of the board. Look for any places where solder has bridged across two pins, or conductive debris causing a short.
Do you have a USB device connected to the shield? If yes, does the problem still occur if you unplug the USB device from the shield and just have the shield by itself connected to the Leonardo board?
You told us about the "3.3V" and "5V" jumpers. What is the third thing you soldered?
Thanks everyone for the help, I checked the voltage on the board and it was way below expected
If anyone else has the same problem as me ALWAYS CHECK the vbus voltage first
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