Hello
I’ve modified a LilyGO sketch with SparkFun libraries to help you out to reset U-blox NEO GPS devices on TTGO T-beam T22- V1.0 and 1.1
This sketch will bring back U-blox GPS N6M & N8M factory settings so that NMEA 9600 over the GPS serial output is enabled.
You can download this sketch on my GitHub:
It worked fine for my 5 T-beams… good luck !