Hi, I'm glad that you solved your issue with not being able to upload the firmware. I think the reason behind the "garbage" characters in the serial port monitor is that you didn't set your baud rate to the correct value. Go through the code, and typically in the setup() function Serial.begin(some_n...

Hi, Do you know of a later version than v 1.0.2? As I know, v1.0.2 is the latest version. If just re-installing the ESP32 Arduino core didn't work, can you please try this? First of all, download Python version 2.7 using this ( https://www.python.org/download/releases/2.7/ ) link, if it's not instal...

Hi,
Have you tried to completely delete the ESP32 core for Arduino and install the latest version?

I think the reason with the unstable value is the ADC noise. To overcome this, you can use multisampling. Instead of doing calculations on one value, use an average of several ADC readings, or even better, use a low-pass filter. Here's a code for the simple averaging: int adc_value_final = 0; int ad...

Hi. Seems like this is not a hardware problem. The esptool software, which uploads the firmware to the chip, runs on a Python programming language and requires a serial port library. Seems like this library isn't installed, but it should be installed by default! Can you try to re-install the Arduino...

Thank you for a reply! I understand that the lack of DC blocking is bad and I will add the capacitors at the input. I don't see any consequence of the clipping problem you mentioned, but maybe it's just not visible in my particular case. I connected the audio input to a PC, played an audio file, re-...

Hi. I'm currently working on a device with an audio input. Here's the schematic I'm using: https://i.imgur.com/5todFeo.png The audio comes from an male audio jack. The ADC resolution is set to 9 bits and channel 6 and 7 attenuators are set to 11 dB. My code currently reads a value from ADC1 channels...

Hi! To this moment I've used pre-made development boards for my project. But my current project requies a custom-made PCB. The ESP32 is on this board, as well as the auto-reset circuit and a USB-UART bridge for direct firmware uploading via USB. However, I overheated the auto-reset circuit transisto...