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1 vote

Accessing GPIO pins of ESP8266-01

For future reference: It turns out my ESP did not boot correctly (If only the red LED lights up, without any flicker of the blue LED, there is a problem). In order to achieve that I needed to pull-up ...
kEks's user avatar
  • 111
1 vote

BME280 temperature sensor gives wrong readings when RGB leds are on/off

TL;DR: The sensor should be thermally decoupled from where the LEDs are, that's about it. It gets warmer when the LEDs are on, whether by conduction, convection, or a mix of both. It quacks like a ...
Kuba hasn't forgotten Monica's user avatar
1 vote

BME280 temperature sensor gives wrong readings when RGB leds are on/off

I don't think the effect is related to the LEDs at all! In 2 of the 4 light transitions you illustrated (where the effect grows) the temperature deviation starts before the light actually transitions. ...
Sim Son's user avatar
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3 votes

BME280 temperature sensor gives wrong readings when RGB leds are on/off

Just by looking at the pictures, the following is quite hard to believe: The BME280 is in the open air, next to the Sonoff and away from the LEDS so it's not affected by their heat The wires to the ...
Justme's user avatar
  • 144k
2 votes

BME280 temperature sensor gives wrong readings when RGB leds are on/off

Your graph is showing gradual convergence / divergence between the sensors over a period of 10-20 minutes; this points towards a thermal effect not electrical. Out of the top of my head, I see three ...
DamienD's user avatar
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4 votes

BME280 temperature sensor gives wrong readings when RGB leds are on/off

By the current information from the post and comment, I still not able to conclude the mechanism and solution for this problem. As it might take a lot of time and effort to fully understand everything,...
M lab's user avatar
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2 votes
Accepted

TCRT5000 combined with ESP8266 ADC voltage divider

Your second schematic would work, but the transistor in the sensor has a saturation voltage of 0.4 V at full reflection. So this way the usable ADC range would be 0.4 to 1 V. If you put the divider in ...
Jens's user avatar
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0 votes

I get error messages when I connect my ESP8266 to my computer

Reinstall your driver then it will work.
HEMANTH KUMAR's user avatar
0 votes

ESP32-C3 USB not working with Android

Here's what happens. When you connect the ESP32-C3 to the phone, the power light comes on and the terminal app reports that a USB device is available. You tell the app to connect to the device, then ...
JavaLatte's user avatar
  • 245
0 votes

Acoustic Noise on SMPS

I can't say that the supply will be damaged, but it certainly is not healthy for it. If the 1KHz PWM current pulses are appearing in the power supply, then the power line filter at the board is ...
RussellH's user avatar
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1 vote

Acoustic Noise on SMPS

You won't damage the power supply. What you're hearing is either the coils or capacitors (or both) responding to the sudden changes in current. This is common on cheap (and sometimes not so cheap) ...
user1850479's user avatar
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1 vote

Pulling 5V logic low using 3.3V microcontroller

Try this: simulate this circuit – Schematic created using CircuitLab
MOSFET's user avatar
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0 votes

ESP8266 Wifi Module - prints “ready” but not responding to AT commands

This worked for me: https://gist.github.com/cabo/ce6358406f8175041813 You can enable/disable crlf in screen comfortably.
rundekugel's user avatar

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