I've been able to connect to our server using the LTE modem sample app.
As shown below, I configure the modem, open a socket, bind the port, and send and receive a small bit of data, but what I receive is not complete.
AT+CFUN=1 OK +CEREG: 2,"4905","011E7701",7,0,0 +CGEV: ME PDN ACT 0,0 +CEREG: 5,"4905","011E7701",7 AT+CGDCONT? +CGDCONT: 0,"IP","ibasis.iot","10.160.124.200",0,0 OK AT#XSOCKET=1,1,1 #XSOCKET: 2, 6 OK AT#XBIND=myport OK AT#XTCPCONN=myurl,myport #XTCPCONN: 1 OK AT#XTCPSEND="Hello World" #XTCPSEND: 11 OK AT#XTCPRECV=25,25 #XTCPRECV: Ã #XTCPRECV: 12
In sending "hello world", I expect a 12-byte error response. I get the first two characters of the appropriate response, but since the second character is a null byte, it seems to stop the transmission, though there are 10 more bytes to be had. In some tests I managed to get most of the bytes by using multiple #XTCPRECV commands thus proving the data is valid.
But if I try sending an appropriate binary payload e.g. #XTCPSEND="\xb2\x00\x08..." I get "tcpip: Failed to parse AT command -11"
I need to set up a TCP stream connection such that our own binary protocol can be sent across the serial modem in both directions. (This should be similar to a WM2 modem)
I also can't seem to find any documents describing the BSD command set I'm using. I've gleaned some from other users' questions and this link:
But I find nothing about why #XTCPCONN works in my case but #XCONNECT does not, and what's the differences are between #XRECV and #XTCPRECV etc.
