Notes on ESP32 Factory Boot Message, and Expressif OTA Infrastructure #314
Description
Summary
An ESP32 which has never been programed has from the manufacturer some code which reports the following out the UART0:
08:01:34.067 -> ets Jul 29 2019 12:21:46
08:01:34.067 ->
08:01:34.067 -> rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
08:01:34.067 -> configsip: 0, SPIWP:0xee
08:01:34.067 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
08:01:34.067 -> mode:DIO, clock div:2
08:01:34.067 -> load:0x3fff0018,len:4
08:01:34.067 -> load:0x3fff001c,len:6932
08:01:34.067 -> load:0x40078000,len:13712
08:01:34.067 -> load:0x40080400,len:4260
08:01:34.102 -> entry 0x400806e4
08:01:34.102 -> �[0;32mI (71) boot: Chip Revision: 3�[0m
08:01:34.102 -> �[0;32mI (72) boot_comm: chip revision: 3, min. bootloader chip revision: 0�[0m
08:01:34.102 -> �[0;32mI (40) boot: ESP-IDF v4.0.1-193-ge7ac221 2nd stage bootloader�[0m
08:01:34.102 -> �[0;32mI (40) boot: compile time 02:47:00�[0m
08:01:34.102 -> �[0;32mI (40) boot: Enabling RNG early entropy source...�[0m
08:01:34.102 -> �[0;32mI (46) boot: SPI Speed : 40MHz�[0m
08:01:34.399 -> �[0;32mI (50) boot: SPI Mode : DIO�[0m
08:01:34.399 -> �[0;32mI (54) boot: SPI Flash Size : 4MB�[0m
08:01:34.399 -> �[0;32mI (58) boot: Partition Table:�[0m
08:01:34.399 -> �[0;32mI (61) boot: ## Label Usage Type ST Offset Length�[0m
08:01:34.399 -> �[0;32mI (69) boot: 0 phy_init RF data 01 01 0000f000 00001000�[0m
08:01:34.399 -> �[0;32mI (76) boot: 1 otadata OTA data 01 00 00010000 00002000�[0m
08:01:34.407 -> �[0;32mI (84) boot: 2 nvs WiFi data 01 02 00012000 0000e000�[0m
08:01:34.407 -> �[0;32mI (91) boot: 3 at_customize unknown 40 00 00020000 000e0000�[0m
08:01:34.407 -> �[0;32mI (99) boot: 4 ota_0 OTA app 00 10 00100000 00180000�[0m
08:01:34.407 -> �[0;32mI (106) boot: 5 ota_1 OTA app 00 11 00280000 00180000�[0m
08:01:34.408 -> �[0;32mI (114) boot: End of partition table�[0m
08:01:34.408 -> �[0;32mI (118) boot_comm: chip revision: 3, min. application chip revision: 0�[0m
08:01:34.408 -> �[0;32mI (125) esp_image: segment 0: paddr=0x00100020 vaddr=0x3f400020 size=0x29230 (168496) map�[0m
08:01:34.408 -> �[0;32mI (194) esp_image: segment 1: paddr=0x00129258 vaddr=0x3ffbdb60 size=0x03974 ( 14708) load�[0m
08:01:34.408 -> �[0;32mI (201) esp_image: segment 2: paddr=0x0012cbd4 vaddr=0x40080000 size=0x00400 ( 1024) load�[0m
08:01:34.408 -> �[0;32mI (202) esp_image: segment 3: paddr=0x0012cfdc vaddr=0x40080400 size=0x03034 ( 12340) load�[0m
08:01:34.408 -> �[0;32mI (215) esp_image: segment 4: paddr=0x00130018 vaddr=0x400d0018 size=0x1068cc (1075404) map�[0m
08:01:34.680 -> �[0;32mI (604) esp_image: segment 5: paddr=0x002368ec vaddr=0x40083434 size=0x195c8 (103880) load�[0m
08:01:34.716 -> �[0;32mI (647) esp_image: segment 6: paddr=0x0024febc vaddr=0x400c0000 size=0x00064 ( 100) load�[0m
08:01:34.716 -> �[0;32mI (665) boot: Loaded app from partition at offset 0x100000�[0m
08:01:34.716 -> �[0;32mI (665) boot: Disabling RNG early entropy source...�[0m
Test Condition
This was US0006 at first connection and power through the USB connector. Captured from the ARDUINO IDE Serial Monitor.
Clear the Serial Monitor then press and release reset.