T-vK

I doubt that any pacemakers would be affected by any kind of ultrasonic noise at < 100 decibels. I mean we are surrounded by ultrasonic noise every day. I mean...

Thank you for taking your time! I didn't know about the internal crc test, that's nice. The reason for 2-way communication instead of sending the same packet repeatedly is that...

@LSatan Thank you, that's very helpful. I added that to my code. This is the only way I could come up with to implement 2-way communication, but it is hard...

Thank you so much! I just tried your code, but I can't get it to work. I set it to INPUT_PULLUP again and when I press the button it wakes...

I'm using 1.8.5 because it's difficult to get the latest version on my OS. I'm testing with an Arduino UNO (it has an ATMEGA 328P chip).

Thank you. :)

I got the Transmitter code to work now, thank you! I'm having trouble with the receiver code though. I checked the wires multiple times and even switched to new wires....

I'm not sure what the problem with the transmitter was, but after using your last code, it just worked. So it must have been a software issue. I didn't think...

I made sure they are further apart than 1m now, but the result is the same as before. I also switched the devices with each other. So I uploaded the...

Unfortunately I don't have any sdr receivers. :/ I might buy one though because it seems like a useful thing to have. Any recommendations? I'm using the [D-Sun CC1101 Module](https://www.aliexpress.com/item/32824627014.html):...