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Questions tagged [esp32]

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

3
votes
0answers
29 views

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 ...
2
votes
1answer
76 views

Can I use MatLab code in esp32?

We've some method to run the MatLab code in esp8266 microcontroller. We can manipulate Arduino pins using Simulink in MatLab. Can we do the same with an esp32 microcontroller as their code can be ...
1
vote
0answers
70 views

Read data from STM32 using UART ESP32 micropython \x00 error?

I am using a LOLIN32 lite (ESP32) to read data sent from a STM32F103 (black pill). The ESP32 is using micropython and the STM32 is programmed using CubeMX + Truestudio. When calling the uart.read() ...
1
vote
0answers
53 views

Control GPIO of ESP32 using Bluetooth [closed]

I’m using ESP32 to control relays using MQTT ( both over Arduino and MicroPython ). For special cases, and not for everyday operation, I wish to control a specific GPIO over Bluetooth ( a reset irq)....
0
votes
0answers
18 views

What to be considered when overriding the max RX buffer? AWS IoT ESP-IDF

What is the recommended max size of the RX buffer (CONFIG_AWS_IOT_SHADOW_MAX_SIZE_OF_RX_BUFFER)? What needs to be taken into account when overriding it? Is it better to chunk bigger messages?
1
vote
0answers
58 views

ESP32: no signal output on I2C bus [closed]

I have an ESP-WROOM-32 (I2C master) and an ATmega328p (I2C slave, address 0x03) assembled on a prototype pcb using external 6k8 pullups. I'm using the ESP's default I2C pins 21 (SDA) and 22 (SCL) as I ...
0
votes
0answers
54 views

ESP32 - using 3.3V Dual relay

I have an issue- which I guess is has some power issue. I'm using ESP32 and a 3.3v Dual relay. My code is simple ( switch up and switch down ), and works fine. The thing is that when all wires are ...
1
vote
2answers
246 views

Number of GPIO pins in esp32 [closed]

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 ...
1
vote
0answers
324 views

ESP32 - 5V output to operate a Relay

I'm playing around with a new ESP32 flashed with Micropython from eBay in order to replace a Rpi Zero W. Am I missing the 5v output? I need it to operate a Relay. Can a 5vDC Relay be operated as ...
3
votes
0answers
38 views

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 - ...
5
votes
1answer
109 views

S3 Actions from ActiveMQ (IoT Core)

I am working on a code for ESP32 which needs to transfers data that is sent via MQTT to AWS S3 storage. Can Someone help me out on how I can achieve this ? I have setup the the client and AWS broker ...
2
votes
1answer
146 views

Data from ESP32 to AWS S3

Can someone here help me out with code to send data from esp32 to aws s3 storage ? I am using esp-idf as I have other code running on the esp32 as well. I am new to aws so any help would be good.
9
votes
1answer
82 views

Need Suggestion HD Camera to be integrated with Wifi module

I am working on one of my IoT project which needs to wide angle HD camera modules to integrated with Wifi Modules (open to Raspberry Pi, NodeMCU or anything else). I have checked various options but ...
3
votes
0answers
254 views

Websockets with Mongoose on ESP-IDF

I'm trying to use the websocket_chat_client example on ESP-IDF platform but the value of status on MG_EV_CONNECT event is always -1, which is a Connection error. What I've done so far is I took the ...
6
votes
1answer
43 views

How can I write bytes to BH1750 via line buffer IC (ESP32)?

I want to switch data reading from multiple sensors by line buffer IC (74F244). My problem is I can't read anything from sensor when I connect via IC but can when connect sensor to ESP32 directly. I ...
1
vote
0answers
37 views

How can I get the sketch going that came with my TTDO LoRa oled esp32? [closed]

I got this device: https://www.aliexpress.com/item/1-Pcs-TTGO-LORA32-V2-0-433-868Mhz-ESP32-LoRa-OLED-0-96-Inch-Blue-Display/32847499968.html?spm=a2g0s.9042311.0.0.MnBocO It came installed with a ...
2
votes
0answers
221 views

Booting up ESP32 normally [closed]

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, ...
7
votes
1answer
670 views

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 ...
9
votes
2answers
507 views

802.11 action frames send and receive in software

Is it possible to gain access to 802.11 action frames TX/RX from software? There's a proprietary protocol based on vendor-specific action frames called ESP-NOW for ESP8266 and ESP32 chips, and I'd ...
2
votes
0answers
297 views

ESP32 & Bluetooth

I'm currently looking into how to set up a sense network made from ESP32s to track BLE tokens in an area, but I'm stuck at the first step... Getting Bluetooth & device listing to work on the ESP32,...
0
votes
1answer
67 views

How can I set up ESP3212 after unpacking? [closed]

Do I need to flash/burn some firmware?Is there a dedicated github page/website?
14
votes
2answers
4k views

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 ...