I wanna connect 2 batteries, 2 esp8266, 4 leds, relay, current sensor in a circuit. the function of the circuit is that 1 battery serves 3 of the 4 leds and if an additional led (the 4th led)is added, the second battery initializes and serves the 4 leds with the first battery. I want to make communication between the two esp microcontrollers, if the 4th led is added and the current sensor readings change, the first esp sends a signal to the second esp to initialize the second battery. I know this circuit can operate with one esp but communication is a must in the project. I need help with the circuit connections and the code.
Start by thinking of two circuits, power bus and data. The data comes from the current sensor, on an analogue input, and returns as an analogue signal to the relay. Don’t forget that you’re not just checking for lo-hi changes, but also the inverse. Depending on the relay, you might be able to get away with a drive push if the state changes. I’d also like to see some charge buffering between the relay and microprocessors, as you never know if someone’ll up the power levels in the future.
The relay, obviously, switches the live side of the batteries in/out. You’ll also need a resistor in line with the second battery to keep LED light levels stable. To check this, you can dummy up the circuit using a switch instead of the microprocessor.