Hi Angus, Just wanted to let you know, we can close this thread is solved, as I assembled my latest board, with the esp32 now routed onto the board. I did a test by just having the EN pin driven by the STM32 GPIO pin directly (with no transistor or other components in the path), and everything worke...

Ahh... I gotcha, you are talking about input 'diode clamping'.. yeah, most chip manufacturers tend to do that today.. that could certainly be a scenario, I'll have to scope it up once I build my new board, and I take this current one off my rig, I can then keep it as is, scope the vdd line, etc, see...

30AWG is something like 320milliohms/m resistance, so even a fairly short length of wire has significant resistance compared to a small ceramic cap's ESR (remember the effective length is doubled due to power/ground both being wired this way). I would bet money this is why the ESP32 is randomly fai...

Ah... do you have a photo of how it's wired in and powered? If you have space on the board, suggest adding a "DNP" (Do Not Place") footprint for a series resistor between the "EN" GPIO of the STM32 and the EN pin directly. You can try placing this resistor first and see if it works OK with the ESP3...

Hi, no problem, my entire project is public and you can see it on hackaday... it's a controller for a reflow oven, using an STM32H7 processor. So there is quite a bit of other stuff in this schematic, but you can just ignore it, as all of that is already done and finalized. https://cdn.hackaday.io/i...

Hi, yeah, you can definitely modify the subject line and do whatever you want with it... I had no series resistor off the GPIO, this was a direct connection... but yeah, you are right, there are tons of ESP32 flavored boards out there that seem to be working.. I too found it very strange I kept gett...

Hi, Yeah, I could very much be wrong, but from all the debugging and troubleshooting I did, it sure seemed to point to EN pin needing more than just a 10k pullup. Anyhow, yes, I know many issues other dev boards are having is related to startup delays, and the state of the strapping pins. In my case...

Hi All, I spent last week connecting up an ESP32-WROOM-32D to my current STM32H7 project (that is already up and running). I received 3 of them from digikey, all came pre-loaded with ESP32-AT firmware 1.1.3. I wired it up in the usual fashion (as reference in the datasheet and on numerous other site...

Hi All, Did you mean to say 'UART2' for the AT commands? (ie GPIO 16/17)? The datasheet for ESP32-WROOM says that UART1 is for integrated SPI Flash? I just received a few ESP32-WROOM-32Ds, and am trying to get the AT working as well... but I was trying against the stock flash it came with, does anyo...