@davee Here is more of the coil specification. Since even at a fixed ambient temperature (20°C) the coil resistance can change due to self-heating,...

@davee Thanks for your comments. Yes, the coil/resistance/temperature spec seems strange. Other relay specifications show this coil specification a...

@will Thanks, that article (and others it led to) help explain the issue of coil resistance change with temperature.

Thanks, Will, that's useful. I'm guessing "Max pickup voltage" is what the DigiKey article calls "Pickup Voltage" which I would understand as being ...

On the topic of Arduino IDEs, I've been using Programino for some time and have found it excellent. It has many more features than Arduino IDE 2.0 and...

@oldnoob72 Hi Steve, welcome to the forum. I'm also a recently joined member. Seeing your background as a hydrogeologist peaked my interest. Bill ma...

It may not be necessary to open two instances. Take a look at this post about an IDE I've been using with good success.

@zander Yes, I notice that delay. Interesting about the WiFi. There seem to still be some things going on I don't understand, which isn't surprising.

@zander I've also been doing some more experimenting. My first version - the one with poor results - was on a solderless breadboard. Since in the past...

I'm not sure. What is the "OP"?