Adding support for multiple emotibits

[Andrey1994]

No description provided.

[Andrey1994]

It should support multiple emotibits now, but I am having a connection issue on the second one. It seems like second emotibit doesnt connect to tcp server control socket and I dont get why.

D:\workspace\brainflow>python python_package\examples\tests\two_emotibits.py --id1 MD-V5-0000063 --id2 MD-V5-0000543
[2, 1, 0]
[2024-11-23 02:34:28.988] [board_logger] [info] incoming json: {
    "file": "",
    "file_anc": "",
    "file_aux": "",
    "ip_address": "",
    "ip_address_anc": "",
    "ip_address_aux": "",
    "ip_port": 0,
    "ip_port_anc": 0,
    "ip_port_aux": 0,
    "ip_protocol": 0,
    "mac_address": "",
    "master_board": -100,
    "other_info": "",
    "serial_number": "MD-V5-0000063",
    "serial_port": "",
    "timeout": 0
}
[2024-11-23 02:34:28.988] [board_logger] [trace] Board object created 47
[2024-11-23 02:34:28.988] [board_logger] [warning] no ip_address provided, trying to discover network, it may take longer
[2024-11-23 02:34:28.996] [board_logger] [info] trying broadcast address: 127.255.255.255
[2024-11-23 02:34:28.996] [board_logger] [info] sending package: 0,0,0,HE,1,100

[2024-11-23 02:34:34.002] [board_logger] [error] no emotibit found
[2024-11-23 02:34:34.002] [board_logger] [info] trying broadcast address: 192.168.10.255
[2024-11-23 02:34:34.002] [board_logger] [info] sending package: 0,0,0,HE,1,100

[2024-11-23 02:34:34.964] [board_logger] [trace] package is 1594496,66,0,HH,1,100,DP,-1,DI,MD-V5-0000063
[2024-11-23 02:34:34.964] [board_logger] [info] received HH package
[2024-11-23 02:34:34.965] [board_logger] [info] Found emotibit: MD-V5-0000063
[2024-11-23 02:34:34.965] [board_logger] [info] use port 3133 for data
[2024-11-23 02:34:34.965] [board_logger] [info] local ip addr is 192.168.10.115
[2024-11-23 02:34:34.965] [board_logger] [info] use port 3132 for control
[2024-11-23 02:34:34.965] [board_logger] [info] sending connect package: 0,0,4,EC,1,100,CP,3132,DP,3133

[2024-11-23 02:34:34.965] [board_logger] [trace] waiting for accept 0/20
[2024-11-23 02:34:35.277] [board_logger] [trace] waiting for accept 1/20
[2024-11-23 02:34:35.589] [board_logger] [trace] waiting for accept 2/20
[2024-11-23 02:34:35.898] [board_logger] [trace] waiting for accept 3/20
[2024-11-23 02:34:36.210] [board_logger] [trace] waiting for accept 4/20
[2024-11-23 02:34:36.210] [board_logger] [trace] emotibit connected
[2024-11-23 02:34:36.210] [board_logger] [info] Message: ML sent
[2024-11-23 02:34:36.210] [board_logger] [info] incoming json: {
    "file": "",
    "file_anc": "",
    "file_aux": "",
    "ip_address": "",
    "ip_address_anc": "",
    "ip_address_aux": "",
    "ip_port": 0,
    "ip_port_anc": 0,
    "ip_port_aux": 0,
    "ip_protocol": 0,
    "mac_address": "",
    "master_board": -100,
    "other_info": "",
    "serial_number": "MD-V5-0000543",
    "serial_port": "",
    "timeout": 0
}
[2024-11-23 02:34:36.210] [board_logger] [trace] Board object created 47
[2024-11-23 02:34:36.211] [board_logger] [warning] no ip_address provided, trying to discover network, it may take longer
[2024-11-23 02:34:36.215] [board_logger] [info] trying broadcast address: 127.255.255.255
[2024-11-23 02:34:36.215] [board_logger] [info] sending package: 0,0,0,HE,1,100

[2024-11-23 02:34:41.220] [board_logger] [error] no emotibit found
[2024-11-23 02:34:41.220] [board_logger] [info] trying broadcast address: 192.168.10.255
[2024-11-23 02:34:41.220] [board_logger] [info] sending package: 0,0,0,HE,1,100

[2024-11-23 02:34:42.131] [board_logger] [trace] package is 1601663,72,0,HH,1,100,DP,3133,DI,MD-V5-0000063
[2024-11-23 02:34:42.131] [board_logger] [info] received HH package
[2024-11-23 02:34:42.131] [board_logger] [info] Found emotibit: MD-V5-0000063
[2024-11-23 02:34:42.131] [board_logger] [trace] package is 2871118,72,0,HH,1,100,DP,3133,DI,MD-V5-0000543
[2024-11-23 02:34:42.131] [board_logger] [info] received HH package
[2024-11-23 02:34:42.131] [board_logger] [info] Found emotibit: MD-V5-0000543
[2024-11-23 02:34:42.132] [board_logger] [warning] failed to bind to 3133
[2024-11-23 02:34:42.132] [board_logger] [info] use port 3135 for data
[2024-11-23 02:34:42.132] [board_logger] [info] local ip addr is 192.168.10.115
[2024-11-23 02:34:42.132] [board_logger] [warning] failed to connect to 3132
[2024-11-23 02:34:42.135] [board_logger] [info] use port 3134 for control
[2024-11-23 02:34:42.135] [board_logger] [info] sending connect package: 0,0,4,EC,1,100,CP,3134,DP,3135

[2024-11-23 02:34:42.135] [board_logger] [trace] waiting for accept 0/20
[2024-11-23 02:34:42.446] [board_logger] [trace] waiting for accept 1/20
[2024-11-23 02:34:42.756] [board_logger] [trace] waiting for accept 2/20
[2024-11-23 02:34:43.068] [board_logger] [trace] waiting for accept 3/20
[2024-11-23 02:34:43.377] [board_logger] [trace] waiting for accept 4/20
[2024-11-23 02:34:43.689] [board_logger] [trace] waiting for accept 5/20
[2024-11-23 02:34:44.000] [board_logger] [trace] waiting for accept 6/20
[2024-11-23 02:34:44.311] [board_logger] [trace] waiting for accept 7/20
[2024-11-23 02:34:44.625] [board_logger] [trace] waiting for accept 8/20
[2024-11-23 02:34:44.936] [board_logger] [trace] waiting for accept 9/20
[2024-11-23 02:34:45.248] [board_logger] [trace] waiting for accept 10/20
[2024-11-23 02:34:45.559] [board_logger] [trace] waiting for accept 11/20
[2024-11-23 02:34:45.870] [board_logger] [trace] waiting for accept 12/20
[2024-11-23 02:34:46.181] [board_logger] [trace] waiting for accept 13/20
[2024-11-23 02:34:46.493] [board_logger] [trace] waiting for accept 14/20
[2024-11-23 02:34:46.803] [board_logger] [trace] waiting for accept 15/20
[2024-11-23 02:34:47.113] [board_logger] [trace] waiting for accept 16/20
[2024-11-23 02:34:47.424] [board_logger] [trace] waiting for accept 17/20
[2024-11-23 02:34:47.738] [board_logger] [trace] waiting for accept 18/20
[2024-11-23 02:34:48.048] [board_logger] [trace] waiting for accept 19/20
[2024-11-23 02:34:48.358] [board_logger] [trace] failed to establish connection
Traceback (most recent call last):
  File "D:\workspace\brainflow\python_package\examples\tests\two_emotibits.py", line 62, in <module>
    main()
  File "D:\workspace\brainflow\python_package\examples\tests\two_emotibits.py", line 29, in main
    board2.prepare_session()
  File "C:\Python311\Lib\site-packages\brainflow\board_shim.py", line 1191, in prepare_session
    raise BrainFlowError('unable to prepare streaming session', res)
brainflow.exit_codes.BrainFlowError: BOARD_NOT_READY_ERROR:7 unable to prepare streaming session

Will explain what is happenning here. First one connects just fine:

[2024-11-23 02:34:34.964] [board_logger] [trace] package is 1594496,66,0,HH,1,100,DP,-1,DI,MD-V5-0000063
[2024-11-23 02:34:34.964] [board_logger] [info] received HH package
[2024-11-23 02:34:34.965] [board_logger] [info] Found emotibit: MD-V5-0000063
[2024-11-23 02:34:34.965] [board_logger] [info] use port 3133 for data
[2024-11-23 02:34:34.965] [board_logger] [info] local ip addr is 192.168.10.115
[2024-11-23 02:34:34.965] [board_logger] [info] use port 3132 for control
[2024-11-23 02:34:34.965] [board_logger] [info] sending connect package: 0,0,4,EC,1,100,CP,3132,DP,3133

[2024-11-23 02:34:34.965] [board_logger] [trace] waiting for accept 0/20
[2024-11-23 02:34:35.277] [board_logger] [trace] waiting for accept 1/20
[2024-11-23 02:34:35.589] [board_logger] [trace] waiting for accept 2/20
[2024-11-23 02:34:35.898] [board_logger] [trace] waiting for accept 3/20
[2024-11-23 02:34:36.210] [board_logger] [trace] waiting for accept 4/20

And it takes ports 3132 and 3133

Second one tries to bind to these two ports(3132 and 3133) first, failed since they are busy and brainflow tries next two ports(3134 and 3135), they are free and should work just fine. It creates tcp socket server on this port, sends connection request to device and waits for connection from the board, it never happens:

[2024-11-23 02:34:42.131] [board_logger] [trace] package is 1601663,72,0,HH,1,100,DP,3133,DI,MD-V5-0000063
[2024-11-23 02:34:42.131] [board_logger] [info] received HH package
[2024-11-23 02:34:42.131] [board_logger] [info] Found emotibit: MD-V5-0000063
[2024-11-23 02:34:42.131] [board_logger] [trace] package is 2871118,72,0,HH,1,100,DP,3133,DI,MD-V5-0000543
[2024-11-23 02:34:42.131] [board_logger] [info] received HH package
[2024-11-23 02:34:42.131] [board_logger] [info] Found emotibit: MD-V5-0000543
[2024-11-23 02:34:42.132] [board_logger] [warning] failed to bind to 3133
[2024-11-23 02:34:42.132] [board_logger] [info] use port 3135 for data
[2024-11-23 02:34:42.132] [board_logger] [info] local ip addr is 192.168.10.115
[2024-11-23 02:34:42.132] [board_logger] [warning] failed to connect to 3132
[2024-11-23 02:34:42.135] [board_logger] [info] use port 3134 for control
[2024-11-23 02:34:42.135] [board_logger] [info] sending connect package: 0,0,4,EC,1,100,CP,3134,DP,3135

[2024-11-23 02:34:42.135] [board_logger] [trace] waiting for accept 0/20
[2024-11-23 02:34:42.446] [board_logger] [trace] waiting for accept 1/20
[2024-11-23 02:34:42.756] [board_logger] [trace] waiting for accept 2/20
[2024-11-23 02:34:43.068] [board_logger] [trace] waiting for accept 3/20
[2024-11-23 02:34:43.377] [board_logger] [trace] waiting for accept 4/20
[2024-11-23 02:34:43.689] [board_logger] [trace] waiting for accept 5/20
[2024-11-23 02:34:44.000] [board_logger] [trace] waiting for accept 6/20
[2024-11-23 02:34:44.311] [board_logger] [trace] waiting for accept 7/20
[2024-11-23 02:34:44.625] [board_logger] [trace] waiting for accept 8/20
[2024-11-23 02:34:44.936] [board_logger] [trace] waiting for accept 9/20
[2024-11-23 02:34:45.248] [board_logger] [trace] waiting for accept 10/20
[2024-11-23 02:34:45.559] [board_logger] [trace] waiting for accept 11/20
[2024-11-23 02:34:45.870] [board_logger] [trace] waiting for accept 12/20
[2024-11-23 02:34:46.181] [board_logger] [trace] waiting for accept 13/20
[2024-11-23 02:34:46.493] [board_logger] [trace] waiting for accept 14/20
[2024-11-23 02:34:46.803] [board_logger] [trace] waiting for accept 15/20
[2024-11-23 02:34:47.113] [board_logger] [trace] waiting for accept 16/20
[2024-11-23 02:34:47.424] [board_logger] [trace] waiting for accept 17/20
[2024-11-23 02:34:47.738] [board_logger] [trace] waiting for accept 18/20
[2024-11-23 02:34:48.048] [board_logger] [trace] waiting for accept 19/20
[2024-11-23 02:34:48.358] [board_logger] [trace] failed to establish connection

[Andrey1994]

I've found the hack used by emotibit sw and its quite weird. It creates broadcast socket first and afte that converts broadcast socket to a notmal udp socket instead creating another one. We've not done it and used broadcast socket for further configuration and it didnt work for multiboard case.

Next commit here will solve it