Issues with Serial Wifi connection
roka80 opened this issue · 7 comments
Hi
I am using your serialOTG.aix in my APP, and it works pretty well.
The setup consists of a Tablet (Client) connected to a Wifi Gateway (Server), which provides the serial tunnel for a single serial device.
Now, I have to change the architecture of the Hardware; instead of connecting the Tablet to the gateway hotspot, I have to connect the Gateway to the Tablet hotspot because of a multi-serial device solution.
With the new constellation, I can not Initialize the Wifi anymore. Do I have to apply a different Initialisation method since we act as a TCP server instead of a TCP client?
Have you got any idea what could be wrong?
Best regards,
Roger
As a server, leave net blank "". SerialOTG will use the phone/tablet TCP address and use the server mode. (See documentation SerialOTG_1.5.pdf.
Note: Only one connection is implemented.
net blank or also dport?
What you mean with only one connection, you mean one Client only?
You need to set dport for the connection from the outside.
One connection: Yes, you can only make one connection from the outside.
Ok, so you mean the outside device, which one the serial port or the TCP/IP port?
I do not need multidevices per App, I will use different APPs connected to different devices, but one App serves one device only.
Its the TCP/IP port. SerialOTG implement a single byte stream that can be treated in the same way (except for timing) for serial over USB, BT (classic) and TCP/IP.
Some methods are only used for serial with an USB-Serial adapter (baud rate, parity, dtr and rt), and has no meaning for TCP/IP or BT. If you are using a serial tunnel, then you must set it up locally or include some kind of control in the byte stream.
The strange thing is, when I use SerialOTG with Wlan adapter (on a tablet), then it works perfectly, since I use it in Hotspot mode, I can not establish a connection? Any idea why there is a difference?
I'm not sure I understand your problem.
When you open SerialOTG after InitializeWIFI with Net="" and your specified port, SerialOTG starts a background process and waits for a connection on that port and your device IP-address. After a connection is made from the outside, it behaves in the same manner as USB-Serial and BT.
Then you can read the byte stream. If no connection is made, you will have a 0 byte to read returned.
You can also use IsConnected() to test if a connection is made, but it will not always report if it is disconnected, due to the nature of the TCP/IP protocol.