Response error code

System frame related error code

Error code	Representative information
0	Success
1	This instruction is not supported (the combo framework contains this instruction but the current platform is not ported or the adaptation does not support it).
2	The instruction parameter contains unsupported operations (the current platform only supports some operations on this instruction).
3	The instruction format is wrong (this refers to the wrong number of parameters, for example, when two parameters are needed, but only one parameter is entered).
4	Parameter error (the content of the parameter is wrong, for example, you need to enter a number from 0 to 9, and 10 or xyz is passed in, which is a parameter error).
5	Wrong parameter length (instruction length exceeds the maximum supported length)
31	The current instruction is not finished, and the status needs to be reported asynchronously. This value is used by the state machine to judge the instruction and does not return a message.
32	Unknown error (or unhandled error type)
3	The instruction format is wrong (this refers to the wrong number of parameters, for example, when two parameters are needed, but only one parameter is entered).

Common gerneral error code

Error code	Representative information
33	malloc mistake
34	Failed to read buf
35	Failed to write buf
36	Configuration error (configuration error loaded from memory, for example, we set the port -1 of OTA upgrade, and check the port error when executing AT+OTA, and then we will report the configuration error).
37	Failed to create task.
38	Flash read and write failed.
39	Serial port configuration error, unsupported baud rate.
40	Serial port configuration error, unsupported data bit.
41	Serial port configuration error, unsupported stop bit.
42	Serial port configuration error, unsupported parity bit.
43	Serial port configuration error, unsupported flow control.
44	Serial port configuration failed.
45	User name/password error
46	Low power mode error or unsupported low power mode
47	Error in uninitialized configuration data (including io mapping data)
63	General error code (no other information)

Wi-Fi Related error code

Error code	Representative information
64	Wi-Fi is not initialized or initialization failed.
65	Wi-Fi mode error (single AP mode cannot connect to Wi-Fi)
66	Wi-Fi connection failed.
67	Wi-Fi connection successful, error in obtaining IP(DHCP).
68	Failed to get encryption method.
69	The specified AP was not scanned.
70	Wi-Fi scan failed to start.
71	Wi-Fi scan timeout.
72	Failed to open AP hotspot
73	Failed to obtain the Wi-Fi information of the router or the information of the AP opened by itself.
74	The network card (STA/AP) is not running.
75	Wi-Fi country code error (unsupported Wi-Fi country code)
76	The current distribution mode is wrong.
95	Wi-Fi connection unknown error.

Socket related error code

GPIO control related error code

Error code	Representative information
128	GPIO mode error (for example, the input is configured and then the output instruction is executed).
129	The IO of the operation did not burn the GPIO mapping table (for example, if the IO mapping of pins 0~4 is set, this error will be reported by operating pin 5).
130	The NC pin can’t be controlled (for example, serial port, VCC, GND are controlled by AT command).
131	Wrong pin mode setting, or unsupported mode.
132	Error in setting GPIO pull-up or pull-down mode)
133	Hardware unsupported PWM cycle.
159	GPIO operation unknown error

HTTP(S) related error code

Error code	Representative information
160	The HTTP(S) response header format error.
191	Unknown error in HTTP(S) request.

About MQTT

Error code	Representative information
192	MQTT connection mode is wrong.
193	MQTT connection failed.
194	MQTT configuration error
195	Failed to publish MQTT message.
196	The MQTT message subscription list is full.
197	MQTT did not receive a response.
198	MQTT busy or connection timeout.
224	MQTT unknown error

About BLE Bluetooth

Error code	Representative information
225	Bluetooth turn on or turn off error
226	Failed to set Bluetooth MAC.
227	Modification of Bluetooth MAC is not supported.
228	The unsupported state or the operation being executed is not allowed in the current state.
229	Bluetooth disconnection failed.
230	Bluetooth failed to set MTU (236 failed to get MTU)
231	Bluetooth failed to send data.
232	Set Bluetooth slave broadcast status
233	Bluetooth host scan failed.
234	The specified Bluetooth was not scanned.
235	Bluetooth connection failed.
236	Failed to get MTU (230 failed to set MTU)
237	Failed to obtain Bluetooth MAC (226: set Bluetooth MAC; 237: Failed to get Bluetooth MAC)