its apparently not for ESP32 as i get the following error when I try to run it .

"Error compiling for board Node32s."

can this code be adapted for node32s ? i see the micro used on the board is ESP32-wroom

how can I generate a 40Khz 50% duty cycle signal in ESP32 wroom ?

basically i am looking for a ready made external usb power adapter to power my esp32 dev board

if i connect my esp32 dev kit to my computer with the usb cable it works perfect but when i connect it to my external 3.3v 2A powersupply it does not work. It must be booting because I see the logo pop up on the oled display but thats it. the board does not connect to wifi or do anything that I have...

i will be using wifi and GPIO pins , do I need AT functionality ?
I see there are factory firmware also ..(factory_WROOM-32.bin ) do i need to upload this one ?
what about if i am using wroom-32 can it also be used for wifi projects without any firmware?

thanks

I bought a WROOM-02u module. Do I have to upload this AT _ Firmware to it ?
if yes then how and where I can download it ? the Espressife site is not letting me download it.

as I dig deeper i found more questions , one of the posts mentioning "Firmware " to be flashed on to the wroom-02u.
So now I have two issues:
1- how to flash the Wroom module
2- how to program the Wroom module

should i open separate post for each?

i am following this article and its mentioning grounding the "ENABLE" pin to put the microcontroller to "sleep" but i can't find any such pin in the schematics ., so which pin the author is talking about?

https://www.pcbway.com/project/sharepro ... c8591.html

yes i know all that ,my question is if I use ftdi and make all connections and give it its own power supply then how do I connect it from Arduino? I dont see any board called "wroom-02u" there. I do use my "node32s" dev board and I do see it in Arduino. My second question is : since I have the node3...

I am seeing many posts about this but i am not clear on if I can directly program this via an ftdi serial adapter and Aduino IDE or do I need an ESP dev board ?
If latter is the case then I have a working Node32s dev board , can I use it?