I bought a couple of ESP32CAMs from aliexpress... althought the listing shows them with two buttons, I got the ESP32-CAM-MB boards with just the reset button...
I have my computer set up to dual boot Windows and Linux so when I got an error in windows, I rebooted and installed the ESP32 boards for Arduino 2.1 and went ahead. I had to also install esptool and pyserial for it to work, but it ended up recognizing the port and every time I try to program it the flash flashes, but the programmer responds with
A fatal error occurred: Failed to connect to ESP32: Wrong boot mode detected (0xb)! The chip needs to be in download mode.
When I enable the serial console and press the reset button I get the following:
ets Jul 29 2019 12:21:46
rst:0x1 (POWERON_RESET),boot:0x1b (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:4
load:0x3fff0034,len:6968
load:0x40078000,len:13072
ho 0 tail 12 room 4
load:0x40080400,len:3896
entry 0x40080688
[0;32mI (31) boot: ESP-IDF v4.1-dirty 2nd stage bootloader[0m
[0;32mI (31) boot: compile time 16:15:01[0m
[0;32mI (31) boot: chip revision: 3[0m
[0;32mI (34) boot_comm: chip revision: 3, min. bootloader chip revision: 0[0m
[0;32mI (41) boot.esp32: SPI Speed : 40MHz[0m
[0;32mI (46) boot.esp32: SPI Mode : DIO[0m
[0;32mI (51) boot.esp32: SPI Flash Size : 4MB[0m
[0;32mI (55) boot: Enabling RNG early entropy source...[0m
[0;32mI (60) boot: Partition Table:[0m
[0;32mI (64) boot: ## Label Usage Type ST Offset Length[0m
[0;32mI (71) boot: 0 nvs WiFi data 01 02 00009000 00005000[0m
[0;32mI (79) boot: 1 otadata OTA data 01 00 0000e000 00002000[0m
[0;32mI (86) boot: 2 app0 OTA app 00 10 00010000 00300000[0m
[0;32mI (94) boot: 3 spiffs Unknown data 01 82 00310000 000f0000[0m
[0;32mI (101) boot: End of partition table[0m
[0;32mI (106) boot_comm: chip revision: 3, min. application chip revision: 0[0m
[0;32mI (113) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x1d2048 (1908808) map[0m
[0;32mI (849) esp_image: segment 1: paddr=0x001e2070 vaddr=0x3ffbdb60 size=0x04d3c ( 19772) load[0m
[0;32mI (857) esp_image: segment 2: paddr=0x001e6db4 vaddr=0x40080000 size=0x00400 ( 1024) load[0m
[0;32mI (858) esp_image: segment 3: paddr=0x001e71bc vaddr=0x40080400 size=0x08e54 ( 36436) load[0m
[0;32mI (880) esp_image: segment 4: paddr=0x001f0018 vaddr=0x400d0018 size=0x9df74 (647028) map[0m
[0;32mI (1127) esp_image: segment 5: paddr=0x0028df94 vaddr=0x40089254 size=0x0b6a0 ( 46752) load[0m
[0;32mI (1159) boot: Loaded app from partition at offset 0x10000[0m
[0;32mI (1159) boot: Disabling RNG early entropy source...[0m
�
SD Size: 29557MB OK
I can see that the board is in SPI_FAST_FLASH_BOOT mode which according to the linked documentation is wrong... but how to I get it to reboot in the correct mode?
Others have had similar issues, but they use another tool stack, so I am not sure what their solution would translate to in the Arduino 2.1 IDE...
stacked
bottoms
tops