ESP8266 Community Forum

- Mon Sep 17, 2018 5:31 pm #78277 Hi

I have a couple of these that I bought a while ago on ebay and I find that I cannot get any output from the serial. Anyhow, I bought one off ebay called the V3 that has a built in USB to serial chip and 3.3V reg so hopefully I should be able to use it. What exactly is the v3? Is this a V1 with some bug fixes?

I have a few questions tho. What are the specs on the ADC converter on this device (I want to monitor battery voltage 12 lead acide) and what are the restrictions on the digital GPIOs D0-D9? ie. can they all be configured as inputs/outputs, (D8 & D9 are usable only if the serial is disabled, do I need to do anything special to this) and are any of these GPIOs able to interface (as inputs) directly to 5V logic?

- Fri Dec 21, 2018 1:29 pm #79669 Just browsing through fellow noob questions to see if answers to mine are lurking between the lines and I noticed yours hadn't been answered, yet. Being a noob, myself, I had the very same question - maybe out of a desire to help explain why things (published sketches, for example) don't seem to work very well for me.

Anyway, this may be the blind leading the blind, but the attached/included link may help. It addresses your first question directly as to the differences between versions, at any rate. Sorry, but I can't help at all with your bonus questions. Good luck!!

https://frightanic.com/iot/comparison-o ... nt-boards/