Pcb layout wireless shell

#1

Hello this s my first post and request for help.
please have a look at my schematic, it is based on the sample design provided by heltec
but when i plug it in i get nothing, please give me a hint

thanks Volker

Schematic_Tracker%20Lora%20dom%20switch_2022-03-11
Schematic_Tracker Lora dom switch_2022-03-11.png1169×827 75.8 KB

#2

Do you check voltages from your power rails ?

#3

Hi Alex,
voltages are there 5v from usb , and 3.3 after regulator, battery charging works, i can not get the pc to recognize the usb com port when pluging in. my guess i made some stupid wiring mistake and i need fresh eyes to see it, i’m blind after looking for hours.

please compare mine to this , the reference design, sorry could not upload document
https://resource.heltec.cn/download/Wireless_Shell

#4

I will check your design. Do you have usb activity on the console ?

#5

no , no activity, today i will change usb to com chip