下载指导

[English]

本文档以 ESP32-WROOM-32 模组为例,介绍如何下载 ESP 模组对应的 AT 固件,以及如何将固件烧录到模组上,其它 ESP 系列模组也可参考本文档。

下载和烧录 AT 固件之前,请确保您已正确连接所需硬件,具体可参考 硬件连接

对于不同系列的模组,AT 默认固件所支持的命令会有所差异。具体可参考 如何了解 ESP-AT 同一平台不同模组差异

下载 AT 固件

请按照以下步骤将 AT 固件下载至 PC:

  • 前往 AT 固件
  • 找到您的模组所对应的 AT 固件
  • 点击相应链接进行下载

此处,我们下载了 ESP32-WROOM-32 对应的 ESP32-WROOM-32_AT_Bin_V2.1 固件,该固件的目录结构及其中各个 bin 文件介绍如下,其它 ESP 系列模组固件的目录结构及 bin 文件也可参考如下介绍:

.
├── at_customize.bin                 // 二级分区表
├── bootloader                       // bootloader
│   └── bootloader.bin
├── customized_partitions            // AT 自定义 bin 文件
│   ├── ble_data.bin
│   ├── client_ca.bin
│   ├── client_cert.bin
│   ├── client_key.bin
│   ├── factory_param.bin
│   ├── factory_param_WROOM-32.bin
│   ├── mqtt_ca.bin
│   ├── mqtt_cert.bin
│   ├── mqtt_key.bin
│   ├── server_ca.bin
│   ├── server_cert.bin
│   └── server_key.bin
├── download.config                  // 烧录固件的参数
├── esp-at.bin                       // AT 应用固件
├── factory                          // 量产所需打包好的 bin 文件
│   ├── factory_WROOM-32.bin
│   └── factory_parameter.log
├── flasher_args.json                // 下载参数信息新的格式
├── ota_data_initial.bin             // ota data 区初始值
├── partition_table                  // 一级分区列表
│   └── partition-table.bin
└── phy_init_data.bin                // phy 初始值信息

其中,download.config 文件包含烧录固件的参数:

--flash_mode dio --flash_freq 40m --flash_size 4MB
0x8000 partition_table/partition-table.bin
0x10000 ota_data_initial.bin
0xf000 phy_init_data.bin
0x1000 bootloader/bootloader.bin
0x100000 esp-at.bin
0x20000 at_customize.bin
0x24000 customized_partitions/server_cert.bin
0x39000 customized_partitions/mqtt_key.bin
0x26000 customized_partitions/server_key.bin
0x28000 customized_partitions/server_ca.bin
0x2e000 customized_partitions/client_ca.bin
0x30000 customized_partitions/factory_param.bin
0x21000 customized_partitions/ble_data.bin
0x3B000 customized_partitions/mqtt_ca.bin
0x37000 customized_partitions/mqtt_cert.bin
0x2a000 customized_partitions/client_cert.bin
0x2c000 customized_partitions/client_key.bin
  • --flash_mode dio 代表此固件采用的 flash dio 模式进行编译;
  • --flash_freq 40m 代表此固件采用的 flash 通讯频率为 40 MHz;
  • --flash_size 4MB 代表此固件适用的 flash 最小为 4 MB;
  • 0x10000 ota_data_initial.bin 代表在 0x10000 地址烧录 ota_data_initial.bin 文件。

烧录 AT 固件至设备

请根据您的操作系统选择对应的烧录方法。

Windows

开始烧录之前,请下载 Flash 下载工具。更多有关 Flash 下载工具的介绍,请参考压缩包中 readme.pdf 文件或 doc 文件夹。

  • 打开 Flash 下载工具;
  • 根据您的需求选择一种模式;(此处,我们选择 Developer Mode。)
Flash 下载工具的模式

Flash 下载工具的模式

  • 选择对应的 ESP 下载工具,如 ESP8266 设备应选择 “ESP8266 DownloadTool”,ESP32-S2 设备应选择 “ESP32-S2 DownloadTool”;(此处,我们选择 “ESP32 DownloadTool”。)
Flash 下载工具选择

Flash 下载工具选择

  • 将 AT 固件烧录至设备,以下两种方式任选其一:

    • 直接下载打包好的量产固件至 0x0 地址:勾选 “DoNotChgBin”,使用量产固件的默认配置;

      下载至单个地址界面图

      下载至单个地址界面图

    • 分开下载多个 bin 文件至不同的地址:根据 download.config 文件进行配置,请勿勾选 “DoNotChgBin”;

      下载至多个地址界面图

      下载至多个地址界面图

为了避免烧录出现问题,请查看开发板的下载接口的 COM 端口号,并从 “COM:” 下拉列表中选择该端口号。有关如何查看端口号的详细介绍请参考 在 Windows 上查看端口

烧录完成后, 请 检查 AT 固件是否烧录成功

Linux 或 macOS

开始烧录之前,请安装 esptool.py

以下两种方式任选其一,将 AT 固件烧录至设备:

  • 分开下载多个 bin 文件至不同的地址:输入以下命令,替换 PORTNAMEdownload.config 参数;

    esptool.py --chip auto --port PORTNAME --baud 115200 --before default_reset --after hard_reset write_flash -z download.config
    

    PORTNAME 替换成开发板的下载接口名称,若您无法确定该接口名称,请参考 在 Linux 和 macOS 上查看端口

    download.config 替换成该文件里的参数列表。

    以下是将固件烧录至 ESP32-WROOM-32 模组输入的命令:

    esptool.py --chip auto --port /dev/tty.usbserial-0001 --baud 115200 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size 4MB 0x8000 partition_table/partition-table.bin 0x10000 ota_data_initial.bin 0xf000 phy_init_data.bin 0x1000 bootloader/bootloader.bin 0x100000 esp-at.bin 0x20000 at_customize.bin 0x24000 customized_partitions/server_cert.bin 0x39000 customized_partitions/mqtt_key.bin 0x26000 customized_partitions/server_key.bin 0x28000 customized_partitions/server_ca.bin 0x2e000 customized_partitions/client_ca.bin 0x30000 customized_partitions/factory_param.bin 0x21000 customized_partitions/ble_data.bin 0x3B000 customized_partitions/mqtt_ca.bin 0x37000 customized_partitions/mqtt_cert.bin 0x2a000 customized_partitions/client_cert.bin 0x2c000 customized_partitions/client_key.bin
    
  • 直接下载打包好的量产固件至 0x0 地址:输入以下命令,替换 PORTNAMEFILEDIRECTORY 参数;

    esptool.py --chip auto --port PORTNAME --baud 115200 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size 4MB 0x0 FILEDIRECTORY
    

    PORTNAME 替换成开发板的下载接口名称,若您无法确定该接口名称,请参考 在 Linux 和 macOS 上查看端口

    FILEDIRECTORY 替换成打包好的量产固件的文件路径,通常情况下,文件路径是 factory/XXX.bin

    以下是将固件烧录至 ESP32-WROOM-32 模组输入的命令:

    esptool.py --chip auto --port /dev/tty.usbserial-0001 --baud 115200 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size 4MB 0x0 factory/factory_WROOM-32.bin
    

烧录完成后, 请 检查 AT 固件是否烧录成功

检查 AT 固件是否烧录成功

请按照以下步骤检查 AT 固件是否烧录成功:

  • 打开串口工具,如 SecureCRT;
  • 串口:选择用于发送或接收“AT 命令/响应”的串口(详情请见 硬件连接);
  • 波特率:115200;
  • 数据位:8;
  • 检验位:None;
  • 停止位:1;
  • 流控:None;
  • 输入 “AT+GMR” 命令,并且换行 (CR LF);

若如下图所示,响应是 OK, 则表示 AT 固件烧录成功。

AT 响应

AT 响应

否则,您需要检查 ESP 设备开机日志,可以通过“下载/输出日志”串口在电脑上查看。若日志和下面的日志相似,则说明 ESP-AT 固件已经正确初始化了。

ESP32 开机日志:

ets Jun  8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x13 (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:7184
ho 0 tail 12 room 4
load:0x40078000,len:13200
load:0x40080400,len:4564
entry 0x400806f4
I (30) boot: ESP-IDF v4.2 2nd stage bootloader
I (31) boot: compile time 11:23:19
I (31) boot: chip revision: 0
I (33) boot.esp32: SPI Speed      : 40MHz
I (38) boot.esp32: SPI Mode       : DIO
I (42) boot.esp32: SPI Flash Size : 4MB
I (47) boot: Enabling RNG early entropy source...
I (52) boot: Partition Table:
I (56) boot: ## Label            Usage          Type ST Offset   Length
I (63) boot:  0 phy_init         RF data          01 01 0000f000 00001000
I (71) boot:  1 otadata          OTA data         01 00 00010000 00002000
I (78) boot:  2 nvs              WiFi data        01 02 00012000 0000e000
I (86) boot:  3 at_customize     unknown          40 00 00020000 000e0000
I (93) boot:  4 ota_0            OTA app          00 10 00100000 00180000
I (101) boot:  5 ota_1            OTA app          00 11 00280000 00180000
I (108) boot: End of partition table
I (112) esp_image: segment 0: paddr=0x00100020 vaddr=0x3f400020 size=0x2a300 (172800) map
I (187) esp_image: segment 1: paddr=0x0012a328 vaddr=0x3ffbdb60 size=0x039e8 ( 14824) load
I (194) esp_image: segment 2: paddr=0x0012dd18 vaddr=0x40080000 size=0x00404 (  1028) load
I (194) esp_image: segment 3: paddr=0x0012e124 vaddr=0x40080404 size=0x01ef4 (  7924) load
I (206) esp_image: segment 4: paddr=0x00130020 vaddr=0x400d0020 size=0x10a470 (1090672) map
I (627) esp_image: segment 5: paddr=0x0023a498 vaddr=0x400822f8 size=0x1c3a0 (115616) load
I (678) esp_image: segment 6: paddr=0x00256840 vaddr=0x400c0000 size=0x00064 (   100) load
I (695) boot: Loaded app from partition at offset 0x100000
I (695) boot: Disabling RNG early entropy source...
max tx power=78,ret=0
2.1.0

ESP32-S2 开机日志:

ESP-ROM:esp32s2-rc4-20191025
Build:Oct 25 2019
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3ffe6100,len:0x4
load:0x3ffe6104,len:0x1a24
load:0x4004c000,len:0x1a6c
load:0x40050000,len:0x20fc
entry 0x4004c35c
I (46) boot: ESP-IDF v4.2 2nd stage bootloader
I (46) boot: compile time 11:24:34
I (46) boot: chip revision: 0
I (47) qio_mode: Enabling default flash chip QIO
I (53) boot.esp32s2: SPI Speed      : 80MHz
I (57) boot.esp32s2: SPI Mode       : QIO
I (62) boot.esp32s2: SPI Flash Size : 4MB
I (67) boot: Enabling RNG early entropy source...
I (72) boot: Partition Table:
I (76) boot: ## Label            Usage          Type ST Offset   Length
I (83) boot:  0 phy_init         RF data          01 01 0000f000 00001000
I (91) boot:  1 otadata          OTA data         01 00 00010000 00002000
I (98) boot:  2 nvs              WiFi data        01 02 00012000 0000e000
I (106) boot:  3 at_customize     unknown          40 00 00020000 000e0000
I (113) boot:  4 ota_0            OTA app          00 10 00100000 00180000
I (121) boot:  5 ota_1            OTA app          00 11 00280000 00180000
I (128) boot: End of partition table
I (133) esp_image: segment 0: paddr=0x00100020 vaddr=0x3f000020 size=0x21bec (138220) map
I (167) esp_image: segment 1: paddr=0x00121c14 vaddr=0x3ffc9330 size=0x02fe0 ( 12256) load
I (169) esp_image: segment 2: paddr=0x00124bfc vaddr=0x40024000 size=0x00404 (  1028) load
I (173) esp_image: segment 3: paddr=0x00125008 vaddr=0x40024404 size=0x0b010 ( 45072) load
I (193) esp_image: segment 4: paddr=0x00130020 vaddr=0x40080020 size=0xb0784 (722820) map
I (324) esp_image: segment 5: paddr=0x001e07ac vaddr=0x4002f414 size=0x09f18 ( 40728) load
I (334) esp_image: segment 6: paddr=0x001ea6cc vaddr=0x40070000 size=0x0001c (    28) load
I (346) boot: Loaded app from partition at offset 0x100000
I (346) boot: Disabling RNG early entropy source...
max tx power=78,ret=0
2.1.0

ESP32-C3 开机日志:

ESP-ROM:esp32c3-20200918
Build:Sep 18 2020
rst:0x1 (POWERON),boot:0xc (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:2
load:0x3fcd6100,len:0x14
load:0x3fcd6114,len:0x179c
load:0x403ce000,len:0x894
load:0x403d0000,len:0x2bf8
entry 0x403ce000
I (54) boot: ESP-IDF v4.3-beta1 2nd stage bootloader
I (55) boot: compile time 12:09:42
I (55) boot: chip revision: 1
I (57) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (64) boot.esp32c3: SPI Speed      : 40MHz
I (68) boot.esp32c3: SPI Mode       : DIO
I (73) boot.esp32c3: SPI Flash Size : 4MB
I (78) boot: Enabling RNG early entropy source...
I (83) boot: Partition Table:
I (87) boot: ## Label            Usage          Type ST Offset   Length
I (94) boot:  0 phy_init         RF data          01 01 0000f000 00001000
I (102) boot:  1 otadata          OTA data         01 00 00010000 00002000
I (109) boot:  2 nvs              WiFi data        01 02 00012000 0000e000
I (117) boot:  3 at_customize     unknown          40 00 00020000 000e0000
I (124) boot:  4 ota_0            OTA app          00 10 00100000 00180000
I (132) boot:  5 ota_1            OTA app          00 11 00280000 00180000
I (139) boot: End of partition table
I (144) boot: No factory image, trying OTA 0
I (149) boot_comm: chip revision: 1, min. application chip revision: 0
I (156) esp_image: segment 0: paddr=00100020 vaddr=3c140020 size=29cc8h (171208) map
I (201) esp_image: segment 1: paddr=00129cf0 vaddr=3fc8f000 size=03be8h ( 15336) load
I (205) esp_image: segment 2: paddr=0012d8e0 vaddr=40380000 size=02738h ( 10040) load
I (210) esp_image: segment 3: paddr=00130020 vaddr=42000020 size=135bf0h (1268720) map
I (489) esp_image: segment 4: paddr=00265c18 vaddr=40382738 size=0c778h ( 51064) load
I (502) esp_image: segment 5: paddr=00272398 vaddr=50000000 size=00004h (     4) load
I (508) boot: Loaded app from partition at offset 0x100000
I (544) boot: Set actual ota_seq=1 in otadata[0]
I (544) boot: Disabling RNG early entropy source...
max tx power=78,ret=0
2.1.0

ESP8266 开机日志:

...
boot: ESP-IDF v3.4-rc 2nd stage bootloader
I (54) boot: compile time 11:18:21
I (54) boot: SPI Speed      : 80MHz
I (57) boot: SPI Mode       : DIO
I (61) boot: SPI Flash Size : 2MB
I (65) boot: Partition Table:
I (68) boot: ## Label            Usage          Type ST Offset   Length
I (75) boot:  0 otadata          OTA data         01 00 00009000 00002000
I (83) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (90) boot:  2 ota_0            OTA app          00 10 00010000 000e0000
I (98) boot:  3 at_customize     unknown          40 00 000f0000 00020000
I (105) boot:  4 ota_1            OTA app          00 11 00110000 000e0000
I (112) boot:  5 nvs              WiFi data        01 02 001f0000 00010000
I (120) boot: End of partition table
I (124) boot: No factory image, trying OTA 0
I (129) esp_image: segment 0: paddr=0x00010010 vaddr=0x40210010 size=0xac0d0 (704720) map
I (138) esp_image: segment 1: paddr=0x000bc0e8 vaddr=0x402bc0e0 size=0x1aba8 (109480) map
I (146) esp_image: segment 2: paddr=0x000d6c98 vaddr=0x3ffe8000 size=0x00788 (  1928) load
I (155) esp_image: segment 3: paddr=0x000d7428 vaddr=0x40100000 size=0x00080 (   128) load
I (164) esp_image: segment 4: paddr=0x000d74b0 vaddr=0x40100080 size=0x059c4 ( 22980) load
I (173) boot: Loaded app from partition at offset 0x10000
phy_version: 1163.0, 665d56c, Jun 24 2020, 10:00:08, RTOS new
max tx power=78,ret=0
2.0.0