I am currently working my way through the Web Server course and have progressed to Project 2.2 Web Server Control Multiple Outputs (Toggle Switches). The project is working fine using the suggested 4 LEDs.

I am making some relatively minor modifications to the project to drive 4 relays. The relay module requires an active-LOW signal to turn the relays ON as opposed to an active-HIGH signal to illuminate the LEDs in the original version of the project. I seem to have figured out how obtain that active-LOW signal when I click the toggle switches appropriately, but the initial conditions are not to my liking.

When the ESP32 is first powered-up, all of the relays start in the active-LOW state which turns them ON. I would like to start with all relays active-HIGH or OFF. Also, I would like all relays to start in the OFF state when the client makes its first request to the server.

I am still in the process of trying to understand the software as presented in the course version of this project and would appreciate some hints on how I might implement modifications to the code to realize the circuit operation as described above.

Thanks in advance!

Ed Wilson