TCP/IP communication using M1-N1

The following example illustrates posting a message form M1-N1 over TCP/IP

Test server address is dweet.io

Test server port is 80

Summary

After the M1-N1 has completed the boot up process. Serial API commands can be used to setup the server details. A socket is opened. Messages are sent and and response is obtained and delivered.

Method 1

+tcp_open,host:iot-chirpstack.aws.signetik.com,port:5731
    +rsp,result:0,socket:4
+tcp_send,socket:4,data:SENDDATA
    +rsp,result:0
    +notify,event:tcp_receive,data:RECVDATA
+tcp_close,socket:4
    +rsp,result:0

Note that +tcp_open, +tcp+send, +tcp_close are the command you would issue. 

+rsp, +notify lines are responses and notifications from M1-N1. These are indented in the above snippet for clarity

Method 2

In the following example +tcp_open, +set, +http_get, +tcp_close are commands issued by user. +rsp are responses from M1-N1 to commands. +notify are asynchronous notifications sent by M1-N1

Example:

1. Open a TCP socket by specifying server address and port

+tcp_open,host:dweet.io,port:80

Socket number is returned in the response. Note this for use later.

+rsp,result:0,socket:3

2. Set server address

+set,server_address:dweet.io

Expected response from M1-N1 echoes the setting

+rsp,server_address:dweet.io

3. Send a message, by constructing the URI. In the following example. Create your own path. In this example the path on test server for this message is dweet/for/signetik

+set,uri:/dweet/for/signetik?param1=234

Expected response from M1-N1 echoes command

+rsp,uri:/dweet/for/signetik?param1=234

4. Listen to response from server. 

Note that the socket number specified for listening is the same as obtained from tcp_open command above.

+http_get,socket:3

Response indicates any error codes. 0: no error.

+rsp,result:0

5. Receive message

Messages received from will be provided as they arrive.

+notify,event:tcp_receive,data:
HTTP/1.1 200 OK

Access-Control-Allow-Origin: *

Content-Type: application/json

Content-Length: 193

Date: Wed, 26 Jan 2022 17:17:21 GMT

Connection: keep-alive




{"this":"succeeded","by":"dweeting","the":"dweet","with":{"thing":"signetik","created":"2022-01-26T17:17:20.975Z","content":{"param1":234},"transaction":"89fcbe51-1811-4daa-a981-271343f7ff08"}}

6. Close socket

+tcp_close,socket:3

Response indicates any error codes. 0: no error.

+rsp,result:0

With the above example, the message sent to test server can be viewed at the custom path chosen for this test in the first step dweet/for/signetik

https://dweet.io/get/latest/dweet/for/signetik