My esp32 chip is used for recording some important data into local memory. I need to send these data to the user webbrowser for drawing a chart. It is about 1MB per hour and I need charts with up to 5days of data (up to 120MB of raw data). At the moment I have written an http server and JSON parser....

I am trying to write my own implementation of PWM driver for generating frequencies below 1Hz. Reading LED_PWM documentation I see some understatement: under LEDC_LSCHn_DUTY_REG (page 387) there is written: LEDC_DUTY_LSCHn The register is used to control output duty. When lstimerx(x=[0,3]), chosen b...

I am looking for an example of low frequency (below 1Hz) PWM. Frequencies below 1Hz are impossible using LEDC driver and it's code (/components/driver/ledc.c) is rather ununderstandable for me. Technical Reference shows general diagram (page 379) but I do not know exact way to set mentioned register...

I have no more pins for CD pin. I store data in the loop and 28ms is much too long for waiting. I believe there is some way (sanding some CMDx command) that would answer immediately on every card.

If there is no SD Card in the slot, sdmmc_card_init returns (with 0x107) after about 29ms for SDMMC Mode and 21ms for SPI Mode.
It's way too long. How to detect SD card existence faster?

Hi, I'd like to use esp32 without wifi network, just as a budget effective microcontroller. I need an information if am I able to holdup RTC time by connecting goldcap capacitor to VDD3P3_RTC and via diode to the other VDD3P3 pins. Tell me firstly if the microcontroller will work and won't provide a...

I cant execute (because 'undefined reference to `test_function'') any function from subfolder. My files structure looks like: PROJECT CMakeLists.txt - main main.c component.mk CMakeLists.txt -- subfolder file.c file.h component.mk CMakeLists.txt (/main/CMakeLists.txt) like: set(COMPONENT_ADD_INCLUDE...

Succeeded!
Add to PATH variable

Hi, I try to setup eclipse ide to work with and compile for esp32. OS: macOS Majove Setup as described below: https://docs.espressif.com/projects/esp-idf/en/latest/get-started/eclipse-setup.html After pressing Build All, console prints: Toolchain path: /Users/kanye/Development/esp32/xtensa-esp32-elf...

I have no web dev background, but have a project to finish so I do learn new technologies
Esp monitors voltage, sends its value to browser. In borwser graph is showed.
What do you mean by encryption? There is no encryption, esp works as AP and provide HTTP server. No ssl or post-alike login.