The reason I ask is that every piece of code I have found requires the Gateway address as part of WifI.config() (Arduino) to be able to set a static IP.

Thanks for that... Can you point me to a code example...

To set a static IP on an ESP32 you need to include the gateway address. The most common default is 192.168.1.1
But others are possible depending on the manufacturer of the router.
Does anyone have a technique to set a static IP without knowing the gateway address, or a method to first find the ...

Many thanks for that... I'll give it a whirl

Hi, Can someone please provide me with a guide to the best Tools settings or explanation for the above processor

- Erase Flash before Sketch upload = enables/disabled
- Flash Mode = QIO/DIO
- Flash Size = 4,8,2,16
- PSRAM = enabled/disabled

and in particular the many options for
- Partition Scheme

I have this in my additional boards manager URLS

https://dl.espressif.com/dl/package_esp32_index.json

I'm on Mojave though

Yes you are propably right the relay takes too much current for the DO
Why do you need this relay anyway
If you do need it why not use a simple transistor to run the relay. This uses 12V but 5V relay will do what you want

Serial.available() returns the number of bytes available to read.

Have a look at this. Ordinary SPP may not assist
https://learn.sparkfun.com/tutorials/bl ... h-profiles

Did you connect with the App I suggested? It is SPP.

Try using a cell phone app like "Bluetooth Terminal HC-05"
If you can pair and receive data with this from the trackpad then you can do it with an ESP32.
Its my goto App for looking at data streams from BT