ESP32 Flashing upload starts and fails with timeout
I have an ESP32-WROOM, as seen here.
In the Arduino IDE, I compile and verify my sketch, and then attempt an upload.
I get the following error:
esptool.py v2.1
Connecting........___
Chip is ESP32D0WDQ6 (revision (unknown 0xa))
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Warning: Could not auto-detect Flash size (FlashID=0xffffff, SizeID=0xff), defaulting to 4MB
Compressed 8192 bytes to 47...
A fatal error occurred: Timed out waiting for packet content
A fatal error occurred: Timed out waiting for packet content
Invalid library found in /Users/me/Documents/Arduino/hardware/espressif/esp32/libraries/BLE: no headers files (.h) found in /Users/me/Documents/Arduino/hardware/espressif/esp32/libraries/BLE
Invalid library found in /Users/me/Documents/Arduino/hardware/espressif/esp32/libraries/BLE: no headers files (.h) found in /Users/me/Documents/Arduino/hardware/espressif/esp32/libraries/BLE
I am using these settings in the IDE for the upload:
I changed the baud rate to 115200, and then also watched the serial monitor, where i saw the following messages appear:
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0371
⸮ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download
ts Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 37⸮ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download
ts Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download
ts Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 37ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download
ts Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
(SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
⸮ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download
ts Jun 8 2016 00:22:57
This is followed by:
esptool.py v2.1 Connecting........_____....._____....._____....._____....._____....._____....._____....._____....._____.....____An error occurred while uploading the sketch _
A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header on the Arduino IDE.
Please help me to understand what I need to do to make this sketch upload work direct to the ESP chip.
Answer
One should need to disconnect the Vin pin until the code is successfully uploaded and keep pressing the BOOT button while uploading the sketch until the Connecting.. line disappears.