In my case the reading should be 66 (or 0 if AIN is put to GND) but once the code has run some time the value goes up around 7 points and jumps up and down in this range.
I found many people complaining about this (nodeMCU and Arduino users) and it's neiter a problem with my power nor one of some kind of radio interference (shielded the comlete board and used battery).
I tried with ESP8266-12 standalone as well as with Wemos D1.
As soon as I WiFi.disconnect(); the reading is correctly at 66 (or 0 if AIN is put to GND)
Most people are interpolating the read values to get a stable result but that's not a good way.
My code for testing is:
(You need to wait a bit since readings in the beginning are correct, then suddenly they start to go up as if some kind of capacitor is filling up)
Code:
#include <ESP8266WiFi.h>
char WLANname[] = "***";
char WLANpw[] = "***";
void setup()
{
Serial.begin(115200);
WiFi.begin(WLANname, WLANpw);
Serial.println(" ");
while (WiFi.status() != WL_CONNECTED) {
delay(300);
Serial.print(".");
}
Serial.println("\nCONNECTED");
// WiFi.disconnect();
}
void loop()
{
Serial.println(analogRead(0));
delay(100);
}
Statistics: Posted by Gorkde — Thu Jun 16, 2016 10:25 pm
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