UART Programer and HT-CT62 not comunicating!

#1

I’ve been fighting to make this work

Heltec UART programmer for programing HT-CT62

all connected to a Mac which synchronizes with HELTEC UART programer and lots of other CH430 chip for usb

so:
HELTEC UART programmer GND —> HT-CT62 GND
HELTEC UART programmer 3.3v —> HT-CT62 VCC
HELTEC UART programmer Rx —> HT-CT62 pin20 (TXD)
HELTEC UART programmer Tx —> HT-CT62 pin19 (RXD)

besides:
HT-CT62 pin11 (EN) to VCC
HT-CT62 pin9 with a switch to GND to be able to Flash

what am I missing?

#2

Is that Pin 9, the GPIO1?

Or GPIO9, the pin 15 - which is the one required to be low to flash …

#3

just found out that connecting it with BOOT button pressed (GPIO9 (pin15)) the board to an usb, works like pressing boot + rat in esp32s3 and enables the flashing process