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.

139 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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16
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2 answers

How can I list the partition table of a currently running esp32 devboard?

I am developing on an ESP32 devboard (esp8266, wroom). I need to get the partition table of the currently running device. This document contains a quite good documentation of its partition table. I can also read/write flash regions by the esptool.py…
peterh
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13
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3 answers

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 like to try to implement it on a Raspberry Pi. It…
Alexandr Zarubkin
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11
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1 answer

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 could not figure out which is the best HD camera…
Rishi
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8
votes
1 answer

ESP32-CAM Camera init failure, SCCB write failure

I can successfully flash my ESP32-CAM to do the blink demo but when I try to run the code below I get the following error (b/t the asterisks/bar.) It seems the "Serial Camera Control Bus" (SCCB) is not able to connect to write to the buffer in…
Jerrad
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7
votes
4 answers

Which IoT platform to visualize real-time and historical sensor data?

In order to prepare some tutorials for my students, I am working on a few DIY electronics projects in the field of IoT. I want to use ESP32, ESP8266, Arduino Uno, and Raspberry Pi. I am more deep on firmware/hardware part and I have no experience on…
Mohammad Taherian
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7
votes
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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6
votes
1 answer

How to transfer data over bluetooth between ESP32 and Android?

I have trying to find examples for codes to exchange data over bluetooth between esp32 devkit module and an Android device. I want to use SDP to broadcast a service and then make my Android app connect to esp socket as client. In Linux I have used…
Ryosuke
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6
votes
1 answer

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 found that endTransmission() in this code return 2…
3ORZ
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5
votes
2 answers

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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5
votes
1 answer

Connect an esp32 with AWS MQTT with SIM800L

I am are trying to use a sim800L module to connect an esp32 running Arduino to AWS MQTT. I need to connect and publish and subscribe to topics. I am doing this successfully via WiFi. Not via the sim800L GSM module. I cannot find any example code.…
saja wahidee
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5
votes
2 answers

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 executed in Arduino IDE? In Arduino, we are only…
Arshdeep Singh
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5
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1 answer

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 as well. I need help to transfer messages to S3 by…
Hitesh Pratyush V
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5
votes
0 answers

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 esp32-idf example, merged it with the…
haxpanel
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4
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3 answers

ESP32 CAM unable to use micropython and connect to the esp

I am trying to install micropython on my esp32 cam. I tried 3 differents ways to do it. First one command and putty I installed python and esptool with pip install esptool. Then I looked wich COM was my esp32 (In my case COM5), then I ereased the…
Gregory Boutte
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