I have an application that needs to reuse the UART0 pins for GPIO and I am trying to work out how to do it. I have used make menuconfig and changed the debug UART output pin for UART0 to pins 21 and 22. When the ESP32 is restarted I see the initial debug information going to pins 1 & 3 (this is OK)....

We were using the D2WD chip with built in flash so that would have been 1.8V (assuming I've read the datasheet correctly). Things has slight overtaken us since the original post. We have made some changes to the hardware and currently have a new prototype in manufacture. We decided to switch from th...

Thank you ESP_igrr. It looks like you are right. I finally managed to get to UART0 through a tricky modification to the board. At boot we are getting something like the following on the UART: rst:0x10 (RTCWDT_RTC_RESET),boot:0x1b (SPI_FAST_FLASH_BOOT) flash read err, 1000 ets_main.c 371 ets Jun 8 20...

Thank you for your help.

Regards,
Mark

By glue logic - I take it you mean we would have to put the logic in our application or write a custom bootloader?

Regards
Mark

After reading the documentation I think I know the answer, but is it possible to use the SPI bus to load a program into the flash memory?

From what I have read I think there are really only two options:

• UART

• OTA

Is this correct?

Regards,
Mark

I have followed the instructions in the documentation web site for setting up JTAG debugging with Eclipse. After completing this I run a simple Blinky example on the WROVER board and that seems to work OK. I then move over to a custom board we are building using the ESP32-D2WD chip programming using...

I think you are right about the timing issue, I did some optimisation yesterday and it looks to be performing as expected. I'll see how it does under stress testing

Thanks for your time,
Mark

I have some code with multiple tasks and queues and I'm creating some test data and the application is exhibiting some odd behaviour. Basic principle, the main application posts a series of messages to a queue ( UARTTaskQueue ). A task, UARTTxTask , waits on the queue and retrieves the messages bein...

Ok, got Windows all set up with an example "hello world" - compiles just great... not the foggiest idea what to do with the pins on the demo board. On the ESP8266 we have to attach 3v3 to 3v3, gnd to gnd, serial in and out - and ground GPIO0 temporarily to program.. So what is the equivalent on the...