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Use of ec200u-cn module

2022-07-24 15:59:00 【Persimmon wind year】

EC20 Official website DataSheet The control is relatively serious , You need to search the documentation carefully or ask the manufacturer or seller for .

Want to use the module , Hardware design instruction manual 、AT Instruction manuals and TCP/IP Application guidance , Three manuals are essential .

1、 Hardware control

Needless to say, the most important power design , The hardware can be designed according to the official document reference .

Mainly about how the software controls ：

A few necessary IO：

EC20 burn 、 Debug interface

Main serial port Rx、Tx

Reset control IO

( A separate ) Power control IO

PowerKey Pin

Others such as SPI、I2C、ADC、SDIO、RTS/CTS Equal module , Anything you can't use can float .

1.1 Startup sequence

General , Startup of a module 、 Shut down and reset , All three operations need to conform to the sequence , Go to the corresponding hardware design manual to refer to how to realize .

Such as EC200U modular , The start-up sequence needs to be lowered 2s above , Pull up again （ More rigor , Pull down the power supply for a period of time and then pull up , then PowerKey Pin down 2s）.

After the module starts successfully , Will actively vomit “RDY” The message is sent to the main serial port .

If you need to power on, start it automatically , You can directly pull down , Note that the resistance value of the pull-down resistor is determined according to the official .

The reset control pin is pulled down to take effect , Generally, the high level is directly assigned during initialization .

2、TCP Connect

Official documents have given “ Use TCP/IP AT The flow of orders ”, You can refer to .

Process description ：

1. Power on first , Wait for the module to spit "RDY", Ready to enter
2. When it's ready , Execute the query command first , Such as CSGN | CCID | QLTS Used to synchronize module information
3. Inquire about SIM Card status
4. Query the network switching service status
5. Configure the scenario and activate
6. open socket The Internet
7. Conduct socket Network data interaction
among 3,4,5 command , If you fail many times , It is recommended to restart the module directly , Or restart it .
6、7 command , You can try to connect more than once .
Reopen socket When the network , It must be closed before opening .
When reactivating the scene , You must deactivate it before opening .
socket When the network is turned on , Choose the corresponding mode according to your own needs ：
Cache mode requires manual data reading ;
Spit only mode is most commonly used ;
Note that the default transmission mode of transparent transmission is string Type data is still hex Format data , Or is hex character string .

Specific commands ：

AT Command to “AT” start , With ‘\r’ ending .

The timeout is generally in seconds , When writing the sending interface, you can design the transmission parameters as seconds .

1、 Inquire about IMEI

AT+CGSN

AT+CGSN
869523054669669
OK

Timeout time ：300ms

2、 Inquire about ICCID

AT+QCCID

AT+QCCID
+QCCID: 89860425101950045915
OK

Timeout time ：300ms

3、 Inquire about SIM Card status

AT+CPIN?

AT+CPIN?
+CPIN: READY
OK

Timeout time ：5s

Returns the parameter ：+CPIN: <code>

Normal reply READY,SIM PIN/SIM PIN2 Express SIM Card locking ,SIM PUK/SIM PUK2 Indicates that a password is required

4、 Inquire about CS Business

AT+CREG?

AT+CREG?
+CREG: 0,0
OK
AT+CREG?
+CREG: 0,1
OK

Timeout time ：300ms

Returns the parameter ：+CREG: <n>,<stat>

Query network registration status ,n Indicates the type of echo information ,0 Is the default ;stat Indicates the network registration status ,1 Yes, the registration is successful , Everything else can be considered wrong .

5、 Configuration scenarios

AT+QICSGP=1,1,"CMNET","","",1

AT+QICSGP=1,1,"CMNET",""."",1
OK

Input parameters ：<id>,<ip_type>,<APN>,<username>,<password>,<APN_style>

id The scene ID, General applications only use 1 individual , namely 0;

ip type ,1 Express IPV4,2 Express IPV6,3 Express IPV4/IPV6;

APN, Indicates the access point name ,“CMNET” It means China Mobile ,“UNINET” Means China Unicom ;

username and password, User name and password ;

APN_style,APN Authentication method , The default with 0.

6、 Activate scene

AT+QIACT=1

AT+QIACT=1
OK

Timeout time ：150s

Be careful 1： If 150S Timeout or activation failure , It is recommended to restart the module directly

Be careful 2： Before reactivating the scene , You must deactivate the scenario first , In the input parameters 1 Represents the scene ID.

7、 Reactivate

AT+QIDEACT=1

AT+QIDEACT=1
OK

Timeout time ：40s, Timeout or failure , It is recommended to restart the module directly

8、 Connect TCP

AT+QIOPEN=1,0,"TCP","mqtt.51gonggui.com",1883,1,1

AT+QIOPEN=1,0,"TCP","mqtt.51gonggui.com",1883,1,1
OK

+QIOPEN: 0,0

Input parameters ：<pdp_id>,<socket_id>,<socket_type>,<ip1/ip2>,<port>,<local>,<mode>

pdp_id, scene ID Corresponding to the above scenario configuration ID;

socket_id, from 0 Start ;

socket_type,TCP/UDP Respectively represent the corresponding client , The server usually uses less ;

ip1/ip2, It can be specific ip Address , Or domain name ;

port, Is the remote port number ;

local, Is the local port number , from 0 Start ;

mode,0 Indicates cache mode （ After receiving the data notification , You need to read the cache manually ）,1 It's only spitting mode （ The received data will be directly spit out through the main serial port ）,2 It's a transparent mode （ The data received by the main serial port is sent directly through the network , The received data is directly spit out through the main serial port ）

however , however ！！！ By default, transparent mode transmits string type data , Unable to transmit hex Format data .（ The manufacturer needs to modify and optimize the version ,, The current mass production version is still not supported ）

9、 close TCP Connect

AT+QICLOSE=0