I know what you're all thinking. This guy did not read the forums, because there are enough posts about serial data transfer.
Well, I did and it did not make my project easier.
The thing is, I want to have an Arduino to send data to another arduino when I turn them on. I don't want to have my laptop connected to the Arduino's. Instead I'll have a 3.5" TFT LCD on one of them.
I have a protocol for sending and recieving data. And with my laptop connected they both work, but when I disconnect my laptop and connect the Tx from the sending Arduino to the Rx of the recieving one. As well as the Rx to Tx ofcourse. Nothing happens. Whilst my code is simply telling te arduino to send data at a frequency of 10 Hz or so.
I would like to know what I am doing wrong or forgetting. I've set-up the connection like I'm supposed to. Serial.begin(115200) and such things are all included.
When I connect the sending Arduino to my laptop, it does not send anything until I open the serial monitor! So I'm assuming it wants to see a reciever first. how do I do that on the Recieving Arduino?