I have an ESP32-WROOM, as seen here : https://www.mouser.co.uk/ProductDetail/356-ESP-WROOM-32 In the Arduino IDE, I compile and verify my sketch, and then attempt an upload. Before i upload, the serial monitor shows: rst:0x1 (POWERON_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2)) wait...

I can see how that achieves:

To put the device into programming mode you need to pull EN & GPIO0 low.

-- That happens when I push the program button.
But how does it achieve:

Then release EN, and moments later release GPIO0.

-- is the 'moments later' part the 2.2uF capacitor C1?

Hi - thanks for the response. The thing is, I already have external programmer boards I could use which are pretty much the circuit you show there. So i tend to favour having a way to enable the the board to be in programmer mode on its own, and then simply conect my UARTs on the ESP to my existing ...

Well spotted - GPIO2 I meant FT232R When you say the enable pin pullup circuit, you mean: https://i.imgur.com/zSrkl6Q.png ie make sure Enable is pulled high. Also I see in the schematic on the datasheet that it has: https://i.imgur.com/cdJagq7.png so do I need to make sure I have C1, C2, C3 and C4 o...

Hi - thank you that's helpful. So basically Serial bootloader -- is what I need to get to program the chip from my ide? That means pulling both GPIO0 and GPIO2(fixed) low. I presume at that point I would need to connect UART to Pins TXD / RXD (35 and 34 respectively) with something like an FTDI RS23...

Hi, I am designing a PCB - and am looking to use this chip ESP32-WROOM-32 https://www.mouser.co.uk/ProductDetail/Espressif-Systems/ESP32-WROOM-32?qs=sGAEpiMZZMu3sxpa5v1qrlicty8cYJkOwWGOmn8CP2I%3D . When writing my software (using Arduino core) I am using a breakout board(similar to this https://www....

Does this happen when you run my project on your esp32 or anybody elses?

Hi all, I am wondering how to interface with this bus switch from a ESP32. I need to drive OE1 and OE2 LOW at 5v , see datasheet here : http://www.farnell.com/datasheets/2288300.pdf?_ga=2.150325878.1322304222.1520888675-1694002906.1520888675 I know that I can only drive up to 3.3v from the ESP32 dir...

Absolutely, look at the source code!

Perhaps literally just run my project and check the voltage on Pin 22....it shouldn't matter if you have the i2s hooked up to a dac or not.