I'm working with the ESP8266 chip that is on the Parallax WX wifi module and I'm trying to connect an external ADS1115 chip to read an analog potentiometer. Unfortunately, the signal from the ADC is very noisy. I did a web search and found that this sort of problem can be caused by the radio on the ESP8266 drawing too much power from the power supply and generating noise on either the internal ADC or an external ADC chip. Can anyone point me to a good power supply design for the ESP8266 that will solve the ADC noise problems. I tried connecting a big 1000uF capacitor across the power supply and that helped but didn't completely fix the problem.
Also, how good are the software ADCs for the Propeller 1? I don't really need a lot of resolution to read a pot. Might that be a better choice than the ADS1115? It, of course, could be used for a lot more than just reading a pot!