I have three ESP01's flashed and running microppython, with ESPNow 2.4 GHz protocol and an a pi Pico, the first ESP01 is the sender and hooked up to a USB breakout board, can be plugged into the computer to change settings, the second ESP01 is the repeater and connected to a drone battery, with a LDO voltage regulator, the third ESP01 is the receiver connected via UART to the Raspberry Pi which executes the led on and off, the raspberry pi pico is also connected to a breakout board which allows a lithium 18650 to power it standalone. This started as a fun project to help me learn during College Automation courses, I happen to have some of the best professors and a brother to help get me inspired