Kyle1987 wrote:Hi all, I've been learning Arduino recently and I'm currently trying to implement the use of WiFi module. The problem is that after connecting and using the test routine, there is no response when I enter the AT command. I can execute until goodnight moon, then I can't execute anymore (hello, world is not visible). I've tried AT and AT\r\n (someone said to add a carriage return, so I typed it that way). I don't know if it's a problem with the routine or the module, but there are two unconnected wires in the diagram, one is reset and the other is IO_0. The former is not needed, and the latter is because it's only necessary to connect low when burning and connect high when running (default). I do not know if this is the right connection? I would like to ask for your help.
You must connect RX (Arduino) -> TX (Wifi Module) and TX (Arduino) -> RX (Wifi Module);
Connecting RX -> RX does not exchange data, since the pins responsible for "listening" to the USART communication data are connected together,