hello my friend Thank you very much for this great tutorial. It had many useful tips. Please advise on adding LEDs exactly like the screen behind you or make a new video.
Hi, great video... When trying to install ESP32 web programmer the following message appears in Google Chrome: [Error: Downlading firmware WebSpecElement.bin failed: 404]
Fantastic! Compiled and downloaded to board. I see a ton of noise in the FFT output browser when no audio is supplied to the microphone. After checking the audio input to the ESP32 (originating in the microphone) I observed 1-V noise pulses at 30 mS intervals. I assume these are related to the WiFi transmitter. Will need to work on power bypassing to reduce the noise. Has anyone else seen this?
I think noise is a common problem with the ESP32, but the cause isn't clear. It's either a physical noise (from the WiFi chip), or the power line has electrical noise. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-zPd5tm6MtfM.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-LCmgfb5HrIY.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BkiDfcDYZFQ.html
Yeah, could be noise from the power supply or usb…. You can reduce it by adding a load to the input like a 1k resistor in parallel with the input port and ground. Also, in the software there is a noise tresshold that you can play around with
WLAN generates a lot of interference in the ESP32. The power supply drops impulsively by several 100mV when WLAN is transmitting. I have tried for a long time to minimise this with external capacitors - without success. The ESP32 cannot be used in applications with WLAN and simultaneous use of ADC or DAC. Therefore I use external ADC's with I2S interface, which are available for little money.
