ESP32C3 AT

[kkkmarch]

Answers checklist

• I have read the documentation ESP-AT Programming Guide and the issue is not addressed there.
• I have used the latest released firmware or have updated my ESP-AT branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

AT+GMR

AT+GMR
AT version:4.1.1.0(ba4dd0e - ESP32C3 - Jul 31 2025 08:38:07)
SDK version:v5.4.1-643-g8ad0d3d8f2-dirty
compile time(7c092f9):Aug 1 2025 05:35:19
Bin version:v4.1.1.0(MINI-1)

OK

ESP-AT Firmware Source

Download from release firmware: https://dl.espressif.com/esp-at/firmwares/esp32c3/ESP32-C3-MINI-1-AT-V4.1.1.0.zip

Hardware Information

ESP32 C3

Power Supply used

USB

What is the expected behavior?

正常情况是抛弃这个命令B

What is the actual behavior?

我发送http请求命令，由于Wi-Fi断开，我在某个时刻发送了命令B，现回复里busy p...,紧接着回复ERROR，但是esp32又处理里这个命令B

Probability of recurrence

偶尔发送

AT+SYSRAM?

AT+SYSRAM?
+SYSRAM:135184,128328
OK

Steps to reproduce

1. Step：断开wifi
2. Step：发送http请求
3. Step：发送命令B
4. Step：回复busy p...（命令B的响应）和ERROR(HTTP请求的响应)
   5.Step：esp32c3处理了命令B，并给了正确的响应

AT command port output

[13:58:58.183]收←◆Command: AT+CIPSNTPTIME?

Response:

busy p...
[TIME SYNC]sync time failed

[13:58:58.338]收←◆ERROR: MPU6050 read temperature failed at I2C operation

[13:58:58.544]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:01

[13:58:59.537]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:02

[13:59:00.541]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:03

[13:59:01.194]收←◆Command: AT+CIPSNTPTIME?

Response:

busy p...
[TIME SYNC]sync time failed

[13:59:01.330]收←◆Command: AT+CWSTATE?

Response:

busy p...
[WIFI] get wifi info failed
ERROR: MPU6050 read temperature failed at I2C operation

[13:59:01.541]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:04

[13:59:02.537]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:05

[13:59:03.544]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:06

[13:59:04.195]收←◆Command: AT+CIPSNTPTIME?

Response:

busy p...
[TIME SYNC]sync time failed

[13:59:04.329]收←◆ERROR: MPU6050 read temperature failed at I2C operation

[13:59:04.543]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:07

[13:59:05.543]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:08

[13:59:06.325]收←◆Command: AT+CWSTATE?

Response:

busy p...
[WIFI] get wifi info failed

[13:59:06.541]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:09

[13:59:07.204]收←◆Command: AT+CIPSNTPTIME?

Response:

busy p...
[TIME SYNC]sync time failed

[13:59:07.335]收←◆ERROR: MPU6050 read temperature failed at I2C operation

[13:59:07.541]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:10

[13:59:08.540]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:11

[13:59:09.542]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:12

[13:59:10.216]收←◆Command: AT+CIPSNTPTIME?

Response:

busy p...

ERROR
[TIME SYNC]sync time failed

[13:59:10.329]收←◆ERROR: MPU6050 read temperature failed at I2C operation

[13:59:10.534]收←◆[TIME UPDATE]time update is 2026-02-21 13:59:13

[13:59:11.325]收←◆Command: AT+CWSTATE?

Response:
AT+CIPSNTPTIME?
+CIPSNTPTIME:Sat Feb 21 13:59:12 2026
OK

AT log port output

NO

More Information.

NO

[ustccw]

@kkkmarch AT 命令是串行的，需要等第二步 HTTP 命令返回后，才能发送第三步的 B 命令。