Would comparator hysteresis be the correct hardware fix?


Yes, it will fix thigns ... what’s happening here is:

Input hovers around the threshold
Noise causes the comparator to toggle rapidly
MCU sees multiple edges .... so multiple interrupts

Adding hysteresis (positive feedback) creates two ...

Hi all,

I’ve been optimizing my ESP32 hardware workflow lately and came across tools that try to automate the PCB manufacturing handoff directly from EDA tools (KiCad, etc.).

For example, some toolkits can generate everything in one step:

Gerber files
BOM (with MPNs)
Pick-and-place files
Assembly ...

I would recommend separate planes for high-current LED power and ESP32 logic ..... especially if your board is big or the LEDs draw a lot of current ..... that keeps switching noise away from the logic.

For smaller boards with short traces, a single ground plane can work as long as you carefully ...

As stated by Sprite, its a power issue .... Your ESP32 likely resets because the LED strip draws high current spikes, which can cause voltage drop on 3.3 V. .... Use a separate 5 V supply for the LEDs, keep the ESP32 logic supply isolated, and make sure the grounds are connected at a single point ...

Search out brown-out spikes .... Your ESP32 GPIOs are likely getting damaged ..... when the battery drops very low.

Best practice is to place a 10–100 µF capacitor across 3.3 V and GND near the LoRa module.

I wouold recommend yo u to use 100–220 ohm resistor on TX/RX

Check this guide, will save ...

Hello all,

I’m in the middle of trying to build a DIY Low-cost oscilloscope with ESP32 .... but I’m running into a few issues and could use some hlp. HEre's my setup:

1) ESP32 Dev Kit (WROOM-32)
2) Attempting to read analog signals (0–3.3V) via the onboard ADC
3) Planning to display results on ...

Most likely its not a dead board .... power or boot issue

ESP32-CAM should be powered from 5V pin ... FT232 adapters often cant supply enough current ... resulting in “no serial data” error

This is a known limitation of the RainMaker app ..... it only shows charts for one time-series parameter per device. Your code and updates are fine, the data is being stored .... the app just don’t render multiple charts.

I think you should go with Wemos D1 Mini, more reliable, flexible in pinout. You have shared seperate product modules, instead of that you should go for a single pcb package, something like this: https://www.pcbway.com/project/shareproject/IoT_Basic_Kit_ESP8266_Wemos_D1_Mini_3d9c62cd.html

All your ...

You should use the PM lock. uart_write_bytes() does not acquire power-management locks. The UART driver allows light sleep during transmission. Light sleep pauses UART output mid-frame. Paused output resumes later, creating timing gaps. Data is not lost, but timing is broken. GNSS devices often ...