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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Is there a way to use ESP8266 in promiscuous(monitor) mode and see the the wifi packets?
I didn't find much documentation about ESP promiscuous mode (just from the espressif sdk although I'm using ArduinoIDE https://docs.espressif.com/projects/esp8266-rtos-sdk/en/latest/api-reference/wifi/...
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MD5 of File doesnot match data in flash Error with ESP32 S3
I am getting the fatal error MD5 of file not match data in flash. Below is the output of upload.
[1/5] cmd.exe /C "cd /D D:\Users\INOMETRICS\espressif\workspace\blink\build\esp-idf\esptool_py &...
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Internet in ESP32 is not working with IPv6
I am using ESP-WROOM-32D in STA mode with Arduino IDE(2.0.5) ESP32 board(2.0.9).
I am trying to do http post request with ESP32. Router that provides internet supports only IPv6.
Here I am getting ...
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How do I set the DHCP pool for an ESP-WIFI-MESH? [closed]
I'm building a mesh with ESP32 dev kits (ESP32-DevKitC V4) using the ESP-IDF VS Code extension and the ip_internal_network example project. The code for the example, common project components, and the ...
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How to set OTA on ESP 32
I am currently using an evalkit Nina W106-00B board that incorporates an ESP32.
I am desperately trying to implement OTA (Over-The-Air) updates.
I started by modifying my partitions.csv file, which ...
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Pool pump man-in-the-middle SDA/SCL with ESP32
Hey all I have found some code on GitHub that works with my pool pump but it seems my model is a little newer than the one they used on on their GitHub. Most things seem to work but what doesn't is ...
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Can't Send Text Messages Using TinyGSM Module, but it works if I do it manually using the ESP-IDF Environment - Sim7600
I am using the following device: https://www.aliexpress.com/item/1005003152097545.html?spm=a2g0o.order_list.order_list_main.119.222218028PapM6
I am trying to make an IoT sound-measurer which will send ...
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How can I control the assignment of DMX512 universes to WS2812B physical outputs sequentially
Background
I am using an ESP32 that receives sACN/DMX512 universes from a controller and am outputting those control signals to a strip of WS2812B pixels using Adafruit's library for WS2812B and ...
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Communication between two ESP32s using WiFi
I have two ESP32s. One is acting as webserver and the other is acting as a client that will send a GET request to the server ESP32. Both of the ESP32s are connected to the same WiFi AP.
For sending ...
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How to wire an ESP32-S2 Dev KitM-1 for power?
I'm putting an Espressif ESP32-S2 Dev KitM-1 into a project box. The box will have 12VDC power and a 5V buck converter for the Dev Kit.
Do I need to use the USB port to power the Dev Kit or can I ...
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Obtaining wrong analog readings using the ESP32 devkitc v4
I know that the topic is not related to Arduino, but I am completely sure that someone can help me find the problem.
I am testing 6 temperature sensors (3 digital, 3 analog). The digital ones are &...
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ESP32: why does malloc can only alloc 126888 bytes with 402540 bytes heap?
I need a buffer of the size 153600 bytes in my ESP32 project, but I could not create a static buffer in code nor can I malloc the buffer.
The ESP32 itself reports:
ESP.getHeapSize() // = 402540
...
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ESP8266 ESPAsyncWebServer LittleFS crashes
I am trying to write a simple web page to be served from my ESP8266 based on this tutorial: https://www.mischianti.org/2020/10/26/web-server-with-esp8266-and-esp32-byte-array-gzipped-pages-and-spiffs-...
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Wifi Scanning code for esp32 wroom 32
I am trying to scan wifi in sta_ap mode in my esp32 wroom 32 module but it is not scanning new wifi .Can anybody tell more about how does wifi mode works in this module and what's the problem in my ...
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My PN532 doesn't detect RFID card when connected with ESP32 in I2C mode while it works perectly with Arduino Uno
I have a Elechouse PN532 module (bought here - https://robu.in/product/pn532-nfc-rfid-read-write-module-v3-kit/). When I try to use to it with I2C and connect it to my ESP32 (DOIT ESP32 DEV KIT V1, 30 ...
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How Much mA dropped in ESP8266-01 Work in LiPo Battery if the WIFI function is continuously on
I working on the system where ESP8266-01 should continuously on because I want to get the Wi-Fi function on. In that case ,I can't use the Sleep mode which is given in the Esp8266-01 . So, My Question ...
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Swap Serial pins of ESP8266?
I have designed and manufactured a PCB which contains an ESP8266 (ESP-WROOM-02D) chip with the serial uart pins connected to a 30pin connector. I made a mistake on the layout (first time designing a ...
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ESP32 WROOM32 SPI EMF issues
I'm trying to run Waveshare SSD1327 128x128 screen via SPI on ESP32 WROOM32 board. On ESP8266 (D1R1?) it works flawlessly while using HW SPI but when I run it on esp32, anything connected to mains ...
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ESP32 Espressif ESP32_DevKitC_V4 in platformio: flash issues
I am using the Espressif ESP32_DevKitC_V4 with platformio, and i cannot flash the board. I read about the various "button dance" procedures, and the ES32-WROVER and the ESP32-WROVER-B seem ...
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Can't enable face detection on esp32 cam : CORRUPT HEAP: Bad head at 0x3ffe2eb4. Expected 0xabba1234 got 0x00000008 abort()
I was trying to make esp32 face recognition using the esp32 camera web server example in arduino ,
and everything works fine untill i press on face detection the frame is frozen , module restarted and ...
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ESP32-DEV is connected to Wifi but not working properly
Hardware:
Board ESP32 Dev Module
Version/Date today's master
IDE name Arduino IDE
Flash Frequency 80Mhz
PSRAM enabled no
Upload Speed 115200
Computer OS Windows 10
Description:
I am doing a project ...
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ESP8266 Arduino Json object array deserialisation into struct
I'm trying to de serialize an array of JSON objects into a struct.
Following the instructions given by the Arduino JSON assistant, I managed to produce this helper function:
void JsonPreprocessor(...
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ESP32-S2 Brownout Detector Randomly Triggered in Deep Sleep
I have thoroughly searched for answers on this over the past couple weeks, and have not been able to find a solution for Arduino.
I'm using an ESP32-S2-Saola-1M Dev board that needs to store a sensor ...
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TTGO TS I²C adress
I'm working on a project using TTGO TS wich communicate wih arduino via I²C protocole
How can I find the adress of TTGO TS board used in I²C communication ?
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Using or creating Wi-Fi Direct (P2P) connection on ESP8266
I want to make a Wi-Fi Direct connection with an android device using my ESP8266. According to ESP8266WiFi Documentation and ESP8266 datasheet, the board has a SoftAP mode which is I think what is ...
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ESP32S v1.1 NodeMcu vs ESP32 DevKitV1
I have two different ESP32 development boards labelled "ESP32S v1.1 NODEMCU" (A) and "ESP32 DEVKITV1" (B). From what I can tell they have the same major components, but their pins ...
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Where to define web server callback functions so they can access server object? (ESP8266WebServer library)
I want my ESP8266-based device to create an accesspoint that allows the user to input their home ssid and password. There is a device object that holds most of the data defined elsewhere.
I'm trying ...
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Calculate battery (18650 Li-ion) voltage using ESP8266-12E
i am trying to calculate the battery voltage using ESP-12E module. I am using a voltage divider circuit to calculate the same. Here is how my circuit looks like:
And here is how my code looks like:
...
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Send data from one NodeMCU to another NodeMCU using Serial Communication
i am using NodeMCU (ESP8266) to communicate with another NodeMCU (ESP8266) using Serial Communication. Because i am using ESP-NOW to communicate and ESP-NOW and WiFi can not work together very well so ...
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how to clear heap memory in esp32?
I am using Free RTOS on esp32 in my program.
However at some point of time when I execute xTaskCreate() it returns -1 , which error is could_not_allocate_required_memory. In my program, each time i ...
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ESP-01 and HC-SR04 problems booting up
I have a problem in a project that I am working, basically I need to use a ESP-01 to receive the measurements from a HC-SR04 and send it to another ESP-01 (which I won't cover here).
Basically my ESP ...
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esp32 Stack canary watchpoint triggered
I am writing a program for esp32 on Arduino IDE. On some point of execution of code for File reading I am facing this exception,
Guru Meditation Error: Core 1 panic'ed (Unhandled debug exception)
...
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How to restart ESP32 on any exception?
While developing a lot of projects (In Arduino IDE) for ESP32 one common issue I am facing is termination of program execution on unhandled exceptions. There are various exception I get. For example: ...
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Making HTTPS requests using ESP8266 AT commands
I am trying to make HTTPS GET/POST requests to the following server using AT commands.
AT+CIPSTART="TCP","54.166.71.140 ",443
I get errors when i use port 443 but on port 80 the ...
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ESPTOOL not recognizing ESP32-S2 chip for SPIFFs transfer
I have a spiff file that uploads fine using a regular esp32, but when I try on the esp32-32, with a fresh installation, I get:
esptool.py v3.0-dev
Serial port COM3
Connecting....
A fatal error ...
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GET/POST request via AT Commands
I am trying to send a simple GET/POST request to a dummy end point on https://requestbin.com/. I am using an ESP8266 module. I am using the arduino serial monitor to send these AT commands. I connect ...
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How to assign ESP8266 access point a hostname that can be resolved by the stations?
I want to assign a hostname to a ESP8266 access point, so that the clients can reach a webserver on this access point without caring about the IP address of the AP. How can that be done?
I tried using ...
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Error compiling to ESP32 using Arduino: Operand 2 of 'l32r' has out of range value
I was trying to follow this tutorial and ran into a problem compiling on the Arduino IDE with an ESP32 board. https://eloquentarduino.github.io/2019/12/how-to-do-gesture-identification-on-arduino/
I ...
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NodeMcu 1.0 resets automatically after sometime
I want to show some digits in a 3x3 p10 red led pannel where the number will come from the cloud and the number keeps updating. For this I have used esp8266 based Nodemcu. I have used WiFi Manager ...
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Is it possible to use CCMP as cipher type on ESP32's softAP mode?
Currently I'm starting softAP mode on ESP32 with WPA2_PSK as auth type(as WPA3 is not supported for softAP). When I am trying to connect my iPhone to the softAP, iOS gives a warning that WiFi security ...
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Using ESP32 Cam internal RAM
I am new to the ESP32 series of boards.I powered up my ESP32 Cam board using the Vcc pin supplying about 7.4V using two 18650 batteries only to find out later that was a completely incorrect way to ...
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Esp 32 keeps disconnecting from com port
I was trying to upload a blinking coding that was in Arduino IDE but the Arduino IDE can not detect my Esp32 but when i press "EN" i manage to get connection but when i letgo the esp32 ...
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ESP32 softAP SSID not const
I would like to be able to set the wifi SSID in the setup(), so I can customize it based on the MAC address or something similar. (avoiding to ESP's with the same code having the same SSID). However ...
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A word after function arguments braces
I'm just reading through a header files for task code in ESP8266 SDK.
I found this line and wondering what does the word PRIVILEGED_FUNCTION after the function arguments braces means ?
void vTaskDelay(...
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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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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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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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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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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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