The problem seems to be the GPIO0 signal. During the "Connecting ....._______" time, if I hold down the boot button, it will start programming. But the target does go into the bootloader mode because my application isn't running anymore during the "connecting ....." I really want to make the auto pr...

I am using ESP_PROG to program the ESP32 module by manually pressing RST and BOOT buttons.
It works no problem.
But the auto program feature doesn't work.
I checked with scope. the signal timing seems to be correct.
Not sure where I did wrong.
The computer is running windows 7.

OK, Thanks.
Will give it a try later.

It was a mistake on my prototype. I used PIN34 and PIN35 for something else. Right now I am developing software on the first round of prototype. I will change it in the next round of prototype. But with what I have, can I reconfig the UART0 to some other unused PINS. I can just solder the flash prog...

Is it UART0?
I would like to keep the monitoring feature, and use UART1 and UART2 for my application.
I didn't find any documentation confirming that.
Thanks
Paul

Nice rule, I like it. I was in the same boat and had the prototype made with the impression that I can only use 2 UARTs. I just into programming about 2 weeks. Got LCD driver working, keypad driver working. ESP32 platform is really good! Back to UART story. In my design, I used TXD0 and RXD0 for my ...

Removed HSPI code. still the same.
Put on the ESP32_WROVER_KIT to do some test now.

Thanks. will do the zero at the beginning.
Is it related to HSPI? I am using HSPI on other I/O lines which is 20MHZ.
Thanks
Paul

I am testing I2C right now. Followed the sample code. static esp_err_t i2c_master_init() { int i2c_master_port = I2C_MASTER_NUM; i2c_config_t conf; conf.mode = I2C_MODE_MASTER; conf.sda_io_num = I2C_MASTER_SDA_IO; conf.sda_pullup_en = GPIO_PULLUP_ENABLE; conf.scl_io_num = I2C_MASTER_SCL_IO; conf.scl...

On the 6PIN connector, the pin labeled with "ESP_TXD" is actually input for ESP-PROG.
I know now it means "connect to the TXD on ESP target".
But all good. board is working, I am happy
Paul