Internet of Things Stack Exchange
Internet of Things Stack Exchange

Questions tagged [esp32]

For questions regarding the programming and use of the ESP32 range of microcontrollers from Expressif Systems.

132 questions
22
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3 answers

Working with Rust on the ESP32

I would like to build a gateway device which will use the ESP32. This should connect to the ModBus TCP port of a Sensor. For this purpose, I would like to use the Modbus Rust implementation, which already exists. But there is very little information…
joesan
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7
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1 answer

ESP32 - How to enable options in PlatformIO

For the ESP32 options are normally enabled with "make menuconfig". PlatformIO with Atom also allows to create ESP32 projects with an empty source folder. It automatically installs an ESP-IDF 0.11. I tried to create a new project following this…
Offler
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5
votes
1 answer

How to use the onboard LED on the ESP32-C3-DevKitC-02

I just bought an ESP32-C3-DevKitC-02 from Espressif, which features an onboard color LED. I'm a bit of a newbie in this space, so I thought I'd start by trying to get a simple "blink" program running. I've installed the Espressif VSCode…
Denise Draper
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4
votes
1 answer

Can I log serial output from ESP32 using Sparkfun's OpenLog?

I am working on a project that largely revolves around the ESP32 WROVER. The device is going to be at a remote location for testing, but I'll need to be able to get the serial output. I think that the OpenLog might be a good solution here, but I'm…
Fliggerty
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4
votes
0 answers

Lua for ESP32: How to obtain time from an NTP server or from time.is or?

I'm working with Lua on the ESP32. I see that contrary to the Lua implementation for the ESP8266, there is no NTP module (correct me if I am wrong). I have been looking at the net library, but am too stupid to put together something which would be…
Riteman
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4
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0 answers

Fail executing RSHELL to acess ESP32 using Micropython

An ESP32 was flashed with micropython, using esptool on Linux system ( Ubuntu 18.04 ). When I tried to runrshell after installing it, it seemed as it start executing, but did'nt reach to login part - rshell --buffer-size=30 -p /dev/ttyUSB0 BTW-…
guyd
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3
votes
0 answers

Digital read from ADC2 pins when wifi enabled in ESP32

Is it possible to get a digital input from ADC2 (GPIO - 0, 2, 4, 12, 13, 14, 15, 25, 26, 27) when wifi is enabled in ESP32?
Buddhi Perera
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3
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1 answer

How to save more than one line in SD card memory

I am trying to store certain text in SC Card memory, but the SD Card save the last line or it does not work at all I'm working with ESP32 microcontroller this is my code #include #include File myFile; int i=0; …
saja wahidee
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3
votes
0 answers

Booting up ESP32 normally

I have an ESP32 chip, not the DevBoard, but the chip only, this one. https://www.olimex.com/Products/IoT/ESP32-WROOM-32/images/ESP32-WROOM32-1.jpg I have a burn board which I use to flash the ESP32, this one…
Kunal Aggarwal
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2
votes
0 answers

Query regarding setting ESP32 eFuses for restricting USB firmware access

I am currently working on a project where I need to restrict the ability to read and write firmware through the USB interface on the ESP32. To achieve this, I have attempted to set the following eFuses for experimentation purposes: UART_DOWNLOAD_DIS…
Hamza Abbasi
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2
votes
1 answer

ESP32 Real Time Data Plot in TCP client

I am implementing a oscilloscope GUI to visualize the data coming from the I2S mic connected to ESP32. The data is transmitted to ESP32 over WiFi through TCP socket connection to PC client where the GUI is made. This is ESP32, server side code. void…
Buddhika
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2
votes
0 answers

SSID and Password Updates OTA ESP32

I am trying to build an application like Wemo App for learning purpose and I am stuck at a place. I am using ESP32 for this learning. In the future, it can be ESP8266 or any other. In the wemo device, you first connect your mobile to your wemo…
Lucifer
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2
votes
1 answer

ESP-WROVER-KIT-VB - seeking code example to write to display

Does anyone have a simple "hello world" example of writing text to the display of a ESP-WROVER-KIT-VB ? My search skills are failing me today.
Mawg says reinstate Monica
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2
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Which IDF to choose for ESP32 developent team

I and my friends are getting started with ESP-IDF. We want to get familiar with Embedded C development and ESp32 seemed to be a very good candidate for our later needs. The problem is there are several versions of ESP-IDF and we are especially…
AGoodStudent
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2
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2 answers

Number of GPIO pins in esp32

I would like to connect sensors with digital signals to ESP32. But I do not know how many pins can be used on ESP32 board for sensors. How many pins are there in ESP32 which can be used for connecting sensors?
a-c-sreedhar-reddy
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