Questions tagged [esp8266]
For questions about the ESP8266 microcontroller unit, including programming it or using it in an IoT context.
123
questions
3
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1
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How to send continuous data from a few ESP8266 to a webserver?
I am new to ESP8266 boards and IoT programming and I don't know how to describe better what I want to do without a picture.
Question: How to send continuous data from 4 esp8266 WiFi clients to a ...
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14
votes
2
answers
7k
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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 ...
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17
votes
2
answers
1k
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What is a good way for an IoT device to receive its network settings?
I'm in the process of building an IoT device using ESP8266. The device will eventually contain a couple of motors, and I would like to control these motors using MQTT. I would like to make the device ...
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1
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0
answers
187
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Is it possible to send data to AMQP server using AT-Command on ESP8266 Wi-Fi module?
I'm currently working on an IoT project which I have an STM32F0 connected to the ESP8266 Wi-Fi module. My goal is to publish data to an AMQP server.
Currently, I'm trying to connect to an AMQP server(...
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1
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1
answer
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How to detect current flow in a live wire running at 220V AC, using Esp32
I have a project planned which is related to home automation. I want to be able to control the lights using an app on phone while also maintaining full manual switch control in case the relay or ...
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2
votes
1
answer
65
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NodeMCU (ESP8266) board controlled over shared hosting database
I have a NodeMCU (ESP8266) board that I want to control over the internet. I am trying to find a solution where I don't have to set up any configurations on my router like port forwarding. I came up ...
- 123
1
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0
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71
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How to display the data on thingspeak using nodemcu?
I am new to the concept of nodemcu and thingspeak. I am doing a project on irrigation. I need to send data to thingspeak through the nodemcu.
The code I uploaded in the nodemcu is shown below:
#...
7
votes
4
answers
4k
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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 ...
1
vote
0
answers
76
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How to connect the ESP8266 and DHT11 to arduino Uno?
I am new to the IoT. I am doing a project which includes collection of weather information and send data to the thingspeak.
I struggled for the connection of ESP8266 to Arduino Uno . Finally its ...
1
vote
1
answer
73
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IoT Light Power Consumption
I have a esp8266 which consumes around ~70 mA when active. I am controlling a light connected to it.
The deep-sleep can't be used here as the light has to be responsive to on/off signals.
What is ...
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0
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2
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77
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Arduino IDE friendly Ethernet development board with ADC?
As my introduction into an IoT project, I thought I'd build a simple home communication system for my family. It has been a very entertaining and eye-opening experience so far. My original plan was ...
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2
votes
1
answer
667
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How does the MQTT server output a single raw file from multiple client publications?
I'm trying my first IoT project whereby I want to:
have an electret microphone capture audio
have an ESP8266 NodeMCU 12-E board submit captured audio to a remote server
have a remote server receive ...
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1
vote
0
answers
720
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Xamarin.Forms to ESP8266 Wifi moduleConnection [closed]
Am build new application for ESP8266.
Then how can i connect my xamarin.forms application to esp8266
any reference and documentation for this.
Already referred WIFIManager library in android many of ...
4
votes
2
answers
1k
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Using Raspberry Pi as a Lora Node for a TTN setup
I already have a LoRa gateway that I made using a NodeMcu with ESP8266 and now I want to send data from a Raspberry Pi 3 through that gateway to the TTN.
The first thing that I did was to connect ...
user7604
6
votes
3
answers
541
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Controlling normal bulbs brightness using Sonoff devices
I am doing a home automation project in which I should be able to control the lights on/off but more than that, the brightness of the lights.
I am using Home Assistant (not hassbian) and Node-Red ...
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4
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0
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129
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MicroPython - ESP8266 using WebRepl
I'm trying to use WebRepl on an ESP8266 port.
Micropython was install OK.
@repl : import webrepl-setup to initiate WebRepl. OK
reboot.
connect to AP of ESP8266 port - OK
using downloaded webrepl.html ...
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4
votes
1
answer
2k
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AWS IoT certificate rejection
I've been trying to configure AWS IoT to communicate over MQTT using TLS for days on a D1 Mini board and have been running into a road block with authentication.
I've used several AWS IoT Arduino ...
7
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2
answers
338
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How does an ESP8266 "advertise" it can handle Alexa "relative volume" commands
As I understand more I WILL edit this question. For now, I am guessing at what I need. To make it easier for people to help, I'll tell you the over all purpose:
I have programmed an ESP8266 to ...
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2
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0
answers
218
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ESP8266-01: How to work with USB to ESP8266
I want to flash micropython on an ESP8266-01, using this wifi adaptor.
Since I don't succeed in doing so (fail using esptool as I do with other ESP8266/ ESP32 I use), I'm asking for your assistance ...
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2
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2
answers
189
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What happens internally when ESP8266 goes into deepsleep mode?
What happens internally when ESP8266 goes to deep sleep mode. Is there any official documentation explaining that?
1
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1
answer
342
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Sonoff basic- GPIO’s
As far as I found documented- there are GPIOS 0, 12, 13, 14 on a basic Sonoff.
Does anyone know if Tx/Rx are free to use after uploading my code, as GPIO’s ?
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6
votes
2
answers
695
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Send values from HomeAssistant to ESP8266 via MQTT
I would like to send values from the HomeAssistant to an ESP8266 via MQTT. I have already successfully done it the other way around (sending temperature values from the ESP to HomeAssistant via MQTT) ...
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6
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2
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130
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By what mechanism are IoT widgets vulnerable to hacking?
I hear news stories that millions of thermostats and fridges have not been properly secured by their manufacturers. I could understand how something running linux with sshd running (as it might well ...
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3
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7k
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Sonoff Dual - Where to find GPIOs
I'm looking for the GPIO's I can use in SonOff Dual ( after flashing my own software ).
In SonOff Basic - there are GPIOs to acess LED, Relay, and what is most needed for me - GPIO14 for external ...
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4
votes
1
answer
251
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Does powering NodeMCU with 3.3 V also power USB-UART module?
I want to power my nodemcu module with 3.3 V.
Does powering it with 3.3 V also power USB-UART module?
If so I do not want this as it eats the battery.
2
votes
2
answers
273
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NodeMCU connected with batteries stopped working after 2 hours
I connected nodemcu with batteries and uploaded a code which sends http post request every 10 min and goes to deep sleep. But after 2 hours node mcu stops sending the data.
Voltage regulator used is ...
5
votes
2
answers
1k
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What is the library to be used to implement CoAP in ESP8266?
I am using Arduino IDE to program my ESP8266. I would like to send data from one ESP8266 module to other. So I would like to use CoAP for this communication. Is there any standard or good library to ...
1
vote
1
answer
406
views
Could not measure power consumption of ESP8266 module [closed]
I want to measure the power consumption of ESP8266-01. For that I connected my multi-meter in series with ESP8266 to measure the current but then ESP8266 does not power up and multi-meter gives zero.
4
votes
2
answers
364
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How to work with an ESP8266 with relay?
I bought this ESP8266 Relay, and I wish to connect to it (in order to install MicroPython, and use Python code). However, I can't find any way to start working with it.
The item is Wi-Fi discoverable,...
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6
votes
1
answer
184
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Could not ping ESP8266 Wifi module connected to an Arduino
I have been working with a water flow counter which sends data over wifi. I'm using an ESP8266 wifi module. Everything is correctly connected and I've gotten to the point where it's correctly ...
5
votes
1
answer
3k
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What is the difference between SPIFFS and EEPROM?
I would like to store some data in esp8266. There are two ways SPIFFS and EEPROM. I can not decide which one to use as both of them saves data. I also read that
both SPIFFS and EEPROM are part of ...
2
votes
0
answers
124
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ESP8266 programming without USB cable [duplicate]
I have a sensor which is connected to an ESP8266 WiFi module and is supplied power through a MB102 breadboard power supply, which takes its power from wall adapter. It is not connected to a computer ...
2
votes
2
answers
498
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ESP8266 code using Python [closed]
I need to connect some sensors wireless using an ESP8266 which transfers data over my home Wi-Fi network from sensor to Raspberry Pi. Now, I was told on the Raspberry Pi Stack Exchange that when using ...
12
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1
answer
1k
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DIY Add a Sonoff To Home Thermostat
I am not an electrical engineer, just an enthusiastic DIY home owner. I would like my A/C to self turn on at 8pm, that is before I get home and have the ability to cut off power automatically. I have ...
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5
votes
1
answer
87
views
Network type for streaming from RPi to several ESP8266 modules
I would like to host a web page from a RPi that has websocket controls that update in 'real time' such as a slider that transmits its value as you move it. I then want to broadcast the values to ...
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6
votes
1
answer
128
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Error: 'NN_DIGIT' does not name a type, while using google-cloud-iot-arduino
I recently started learning IoT with ESP8266MOD (Arduino IDE). I want to start working with Google Cloud IoT, but confused about how to use google-cloud-iot-arduino.
I tried its Esp8266-http example, ...
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7
votes
2
answers
425
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Local and distant MQTT communication
In my project I have a set of sensors in a local network that should communicate with a Raspberry Pi 3 and then with a distant MQTT broker.
Since I'm using ESP8266 for the sensor nodes I thought I ...
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3
votes
0
answers
118
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Is it possible to use both Lua and the Arduino IDE on the node-mcu?
I've been playing around with two node-mcu boards uploading Lua scripts via ESPlorer on one and uploading code built from C++ via the Arduino IDE.
I've come to a point where I have preference for Lua ...
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1
vote
0
answers
416
views
Fixing the Sampling Rate of ADC in ESP8266 Wi-Fi Module [closed]
What is the sampling rate of the internal ADC of ESP8266 Wi-Fi module and how can I fix it to some other value by programming it in Arduino IDE? Please help.
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0
answers
1k
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Internet of Things: ThingsBoard.io
I am in a middle of an IOT project. I have to design the dashboard. I am facing difficulties in setting up the dashboard. I am using thingsboard.io
I want to know how to send data from thingsboard ...
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6
votes
0
answers
920
views
Connect NodeMCU 0.9 to WPA2 Enterprise
Is there a way to connect to a NodeMCU 0.9 to WPA2 Enterprise like Eduroam?
Now I'm using the Arduino IDE 1.8.5 with the library: ESP8266WiFi.h
In this way I simply connect to a personal WPA2 with ...
- 161
4
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0
answers
282
views
NodeMCU - create public webserver
How would I go about creating a public web server so that I can control my NodeMCU v3 from anywhere in the world? I was thinking about flashing espruino on my board since I have more experience with ...
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12
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2
answers
2k
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Detecting IoT devices in web browser?
Recently I bought a couple of wifi relays from Xiaomi. While they have been solid so far, I really dislike Xiaomi's app. But, I do like the idea that it actually works both in LAN and over the ...
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5
votes
1
answer
434
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File Transfer from ESP8266
How can I download / access a file contained in the ESP8266 SPIFFS memory over the internet and not only on a local wi-fi? Can it send a complete file contained on its SPIFFS memory to a website or to ...
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2
votes
0
answers
87
views
How to connect to an ESP8266 via public address? [closed]
Can we connect to an ESP8266 (through the internet) knowing its local and public IP addresses without setting the WiFi modem to which it is connected?
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4
votes
2
answers
5k
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Can I upload code to NodeMCU without using micro USB?
Is there any way for me to upload code to NodeMCU without using micro USB?
I tried to connect RX TX (NodeMcu) along with TX RX (Arduino) but it failed.
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9
votes
1
answer
2k
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Is there any way to access local server from outside without port forwarding? [duplicate]
Situation
I need to access an ESP8266's Wi-Fi local server from outside.
Like Xiaomi Yeelight (YeeLight Introduction Web Site Link) or LOHAS LED
(LOHAS LED Web Site), I have to control it from ...
- 227
12
votes
3
answers
2k
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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 ...
0
votes
1
answer
76
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?
3
votes
0
answers
334
views
Watchdog timer changed router and esp8266 behaviour [closed]
I am working on a home automation project where Pi is acting as broker and ESP8266-01 are acting as clients using Node-Red interface. The ESP acts differently almost everytime I recycle the power. At ...
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