Questions tagged [espressif]

Espressif Systems (688018) is a public multinational, fabless semiconductor company established in 2008, with headquarters in Shanghai and offices in Greater China, India and Europe. We have a passionate team of engineers and scientists from all over the world, focused on developing cutting-edge WiFi-and-Bluetooth, low-power IoT solutions. We have created the popular ESP8266 and ESP32 series of chips, modules and development boards.

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ESP-NOW and WIFI and OTA at the same time on Sender and Receiver

I am trying to set up two ESP32s so that they can be updated via OTA and at the same time send sensor readings using ESP-NOW, from Sender Board to Receiver Board. For this to work both boards must ...
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ESP8266httpUpdate library built-in led blinking time

I have been working with the ESP8266httpUpdate library for a while now, I want to change the frequency of the blinking built-in led of the esp8266, I couldn't figure out how this library is commanding ...
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How to use maximum GPIO on ESP12e [duplicate]

I'm using esp12e for my project and encountered difficulty in using more than 5 GPIOs. I have connected GPIO15 to Ground, GPIO0 to VCC, Enable to VCC (Connections as as per attached image). I'm able ...
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ESP32 Low Power Reconnect Latency Question

I am trying to develop a small 9-button BLE keyboard on the ESP32 with a rotary encoder as a volume knob. My question involves the low power modes and the time it takes for them to wake up. My ...
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1answer
77 views

esp8266 OTA issue

I have uploaded the BasicOTA sketch in Esp8266-12e. I am written one program, when i try to upload it first time in Esp using the OTA port it gets uploaded successfully, but when i try to upload any ...
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Split string using a delimiter then saving to different variables [duplicate]

I have a string that looks something like this "43;27;42;27". It is the data from 4 DHT22 temperature sensors, i need to splice this string every ";" and save the number to a variable. In the end, I ...
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193 views

AsyncWebServer giving wdt reset

I am using 3 Esp32 modules. One being master and other two being nodes. Nodes are connecting to the master's AP. Master is connected with GSM module to execute the web api. Master esp is having a ...
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28 views

ESP8266 EEPROM Reading extra character

I am very very new to ESP Programming. I am trying to store Strings into EEPROM of ESP8266. I am storing the string into eeprom successfully but while reading it from EEPROM extra character 'd' is ...
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197 views

Stream esp-32 camera to RMTP server like YouTube

I am doing research for a project in which I need to play with camera streams. After multiple hit and trails and googling I am not getting even close to the solution for streaming ESP-32 Camera stream ...
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37 views

Creating a router with ESP32 and SIM800c

I am trying to create a device which is a combination of ESP32 and Sim800c. This device (Master) will start AP mode on ESP32, so that other devices (Nodes) will connect to this AP. The Sim800c will ...
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How to change the OUI (Organizationally Unique Identifier) of the WiFiNINA module

There are only examples for ESP32 wifi modules to change the mac address of the device, but I don't know if I can use the same library for the WiFiNINA module. Is it possible to change the OUI of the ...
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esp32-cam publish image to mqtt

I want to publish image capture through ESP32-CAM to MQTT. Have following code : #include "WiFi.h" #include "esp_camera.h" #include "esp_timer.h" #include "img_converters.h" #include "Arduino.h" #...
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Code uploads successfully on esp8266-01 but doesn't run

I am using esp8266-01 board. It was working fine few days ago, the codes uploaded and ran successfully. But now that I upload code to it, it gets uploaded successfully but it doesn't work. I am using ...
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669 views

esp32 arduino wifi disconnect

I have this code running on ESP32 connected to SVM30-J #include <WiFi.h> #include <PubSubClient.h> #include <Arduino_JSON.h> #include <svm30.h> // Replace the next variables ...
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139 views

ESP8266 NONos SDK with Arduino ide or VSCode PlatformIO

I have few questions about esp8266 programming. I am trying to make a iot application with esp8266. I have to run esp on two modes and create tcp server and http client. I did this application with ...
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1answer
142 views

ESP32-CAM interfacing with CCS811+HDC1080+BMP280

I want to measure Temprature, Pressure, Humidity and CO2 in a room with ESP32-CAM & CCS811+HDC1080+BMP280 Since this module is combination of 3 sensors. Can I integrate it with ESP32-CAM over ...
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267 views

esp32-cam reading bme280 with Arduino IDE

I am trying to interface BME280 with ESP32-CAM (Yes because later I need to take pictures also). Was following this tutorial. The BME280 board I have it has VCC, GND, SCL, SDA pins for hardware I2C. ...
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Lg g6 can't find Esp32 bluetooth

My lg g6 cant find esp32's bluetooth. Lg g6 bluetooth is fine as i can connect other devices Esp32's bluetooth is fine as i can connec from my samsung s9 to the esp32. Tried reseting and clearing ...
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253 views

Send HTTP request from Arduino UNO+ESP8266

I am trying to send an HTTP request from from an Arduino UNO through an ESP-01 connected by Serial. Communication with the ESP and connection to the AP work fine. But when i try to send an HTTP ...
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566 views

How to upgrade ESP8266 NodeMCU SDK from V2.5.2 to V3?

ESP.getFullVersion() output: SDK:2.2.1(cfd48f3)/Core:2.5.2=20502000/lwIP:STABLE-2_1_2_RELEASE/glue:1.1-7-g82abda3/BearSSL:a143020Connecting to DO_231455 I upload sketches from the Arduino IDE. How ...
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254 views

OTA updating the ESP32 from a separate server

I have an ESP32 project which I'd like to be able to update OTA. The trouble is that it is in deep sleep for approximately 15 minutes before waking up, connecting to WiFi sending an MQTT packet then ...
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53 views

Online Json Service for Esp32

I'm building a simple outdoor temp and humidity sensor with an esp32 I've aquired but I need a platform that I can submit the Json to so that then my laptop can make an http request to get the Json ...
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1answer
776 views

Stack smashing protect failure ESP32 with Modbus RTU

I'm doing a project using an ESP32 TTGO with LoRa, the Max485 and a WELLPRO ADAM 8082 for Modbus communication. I'm trying to use the ESP32 as a master to and the ADAM as a slave. I'm also using Node-...
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ESP32 bluetooth discovery parse names

I'm running a sample code from ESP32 examples and I'm scanning available BLE devices. I can see device MAC address etc. But for few devices I can't see their names.I am using ESP-WROOM-32 with ...
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52 views

A few questions on the first steps with an ESP32/ESP8266 NodeMCU [closed]

I would like to know what are the first steps, as a good practice, when receiving a new ESP based NodeMCU. For example: Checking if everything works fine After you connect to the relevant COM port, ...
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558 views

Adafruit esp32 Feather Failing to compile

So yesterday, I was able to upload/compile given example code to the Esp32 Huzzah board. Today I couldn't even compile. Even carefully using the tutorial adafruit provides. I was getting errors as ...
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2k views

Arduino Uno & ESP32 communication using RS485

I am trying to establish a communication between Arduino Uno ( Master) and ESP32 (Slave) using RS485 protocol (using MAX485 module). I have successfully done this between two Arduino Unos. ...
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214 views

Clock cycle count count for the same command is not equal in ESP32

I am using ESP32 Pico Kit with Arduino Ide. I want to measure operation cycle for a few commands. The code is so simple as below: void setup() { Serial.begin(9600); } void loop() { unsigned ...
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1answer
592 views

WindowsError(31, 'A device attached to the system is not functioning.') in arduino

Having board esp32 devkit v1, to get started with arduino ide (installed recommended boards for esp32) I marked board asDOIT ESP32 DEVKIT V1 (as no other options as like ESP32 DEVKIT V1 ) so upload ...
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444 views

How to / is it possible to change Vendor Name in ESP8266-12E?

I am aware of that it is possible to change hostname for ESP8266 but I want to change vendor name also so that it lists my company/product name in routers/firewalls. Is it possible?