I have a basic code writing on a SD card with a method called appendToIt that I call at the end o setup several times and it works no problem. But when I try to call the same method (just once) in the loop void loop() { if (firstTime) { Serial.println(" try print in loop first time "); firstTime = f...

Hi, I'm building an open source device that could produce some of the substances needed for biological research including COVID testing but it could do much more than that. This is just a hobby for me but it's a pretty serious hobby and I hope it will make a real difference in the world. Here is whe...