Re: Getting started with ESP8266, AT FW, and first IOT proje
Posted: Tue Jan 22, 2019 6:51 pm
Thank you very much for the advice. Yep, the power supply isn't a trivial issue and just like yourself, I made a lot of experiments until I started to get proper responses from the module. Well, checking my supply here with a DMM, the AC reads 1~2 mV. It is a well designed and regulated voltage with filtering caps. So, you suggest adding that electrolytic cap across the power lines of the module?
gibo77 wrote:Be careful with power supply. Even though your fluke meter would say 3.34VDC, it does not mean it will ALL work. Mine was working EXCEPT on the wifi functionality. I could not ping the ESP8266!!
I learned it the hard way. Good thing I read some threads here and pointed to check your power supply.
Mine was reading 3.34VDC, but the AC part was around 50mV, so there is so much ripple. I made my own power supply but I got lazy on the capacitors. So I jumpered it with an electrolytic with capacitance of 47uF. Low and behold it worked! Now I can ping it and Alexa can recognize my device. Sweet feeling after that!
My AC now becomes 4mV.
Happy designing!