Questions tagged [esp8266]
For questions about the ESP8266 microcontroller unit, including programming it or using it in an IoT context.
94
questions
0
votes
0answers
17 views
convert string type value to integer type getting wrong result
I'm working on a project where I use MIT app inventor's spinner to select some one of the numeric value like 250 ,1000.
I'm sending this value to firebase database and from that receiving it in ...
0
votes
0answers
14 views
Not getting data from nodemcu to the firebase
I've done almost everything to get the data from nodemcu but nothing happened.
I tried by changing the fingerprint.
I have also used project secret and copy it in FIREBASE_AUTH part.
I also ...
0
votes
1answer
13 views
how fast can i send data to firebase from nodemcu 1.0?
I was sending some variable value to the firebase database I have created how fast can I send it.what would be minimum time interval between two values nodemcu can send and fire base can receive? I ...
1
vote
1answer
23 views
Can I use the CC2531 Zigbee sniffer with a ESP8266 via serial, no USB involved?
I have a CC2531 connected via USB to my server to read/control some Zigbee devices. I use the version with external antenna.
I found that the location of the server is not optimal and I would like to ...
1
vote
1answer
18 views
Cayenne IOT widgets greyed out using ESP8266 NodeMCU-12e
I'm using an ESP8266 NodeMCU-12e, connecting to Cayenne IOT platform. Most things work fine (I can update most widgets using virtual channels), but some widgets are unavailable (greyed-out), or simply ...
1
vote
1answer
55 views
Write temperature data from multiple esp8266 (node MCU) to single database without internet
I am currently working on a project to read temperatures from multiple points using a sensor and Node MCU setup. I require all these datas (from 16 node MCU) to be stored to a web server. Can I do it ...
2
votes
0answers
26 views
Custom flashed Sonoff basic doesn't work when connected to main power
I flashed a sketch to a Sonoff basic switch R2 through Arduino IDE (with FTDI).
Flash is completed and Sonoff runs the sketch successfully.
The code is just a typical setup for making esp8266 a soft ...
0
votes
1answer
40 views
How to pair IoT device
I've seen on the internet how the IoT device gets connected to the Android/iOS apps. In one video, one guy kept pressing one button for several seconds and the device enters in pairing mode and mobile ...
2
votes
0answers
53 views
Not getting LWT MQTT Arduino
I'm trying to test a two combined examples: OTA and MQTT .
My goal it to check a LastWill when disconnecting an ESP8266 devic. Surprisingly, a LWT is not sent to designated topic.
code has not ...
3
votes
1answer
66 views
How to control multiple ESP-01 with an app? [closed]
I've been working on a school project that consists into making a smart light socket. I want to make an app which will allow the user to control many of them, like switching on and off, controlling ...
3
votes
1answer
58 views
get trigger from IFTTT - using ESP8266
I'm using a Wemos mini, to switch on the light.
I'm trying to figure out how to combine IFTTT and Sunset and Sunrise from Weather underground to trigger the lights ON.
All examples I find, is how ...
3
votes
0answers
34 views
Is there any solution to run any RTOS on windows/linux virtual machine?
I am writing firmware for different boards supporting FreeRTOS, Zephyr, ...
My problem is when I am developing the firmware, I should run the firmware on the "real" device from the beginning and ...
1
vote
0answers
41 views
ESP8266 and MQTT not working with new router [closed]
Got a new router from the ISP and my ESP8266 NodeMCUs are causing problems, they need very long to connect to WiFi (3-4 mins), which wouldn't be that big of a problem, but they also don't connect to ...
1
vote
1answer
53 views
Speech recognition using esp8266
I'm working on a project where I have to send voice through mic to a Speech recognition API using esp8266 where the voice is get processed. Is there any possible way I could do this with esp8266?
I ...
0
votes
0answers
11 views
How to give an Alexa device wifi credentials on the fly [duplicate]
I have created an alexa controlled smart switch using esp8266 and fauxmo library and it works fine .However I need to set the wifi credentials as well as device name within the code which is not ...
2
votes
2answers
81 views
z wave and zigbee development boards
ESP8266 provides an amazing environment to build iot devices for smart home. I managed to build all kinds of gadgets raging from simple temperature and humidity recorders to more advanced actors with ...
1
vote
0answers
59 views
CCS811 eCO2 readings factors wrong
I have an ESP8266 (Wemos D1 mini pro v2.0.0) running esphome.io measuring CO2 with an Winsen MHZ-19B and an Adafruit AMS CCS811. I would like to use only the CCS811 to save power and space, however ...
1
vote
0answers
119 views
What are lower latency alternatives to using MQTT brokers with the ESP8266
I'm experimenting with the nodeMCU board attempting to proto type out an IoT project. My first iteration involved using an MQTT broker to send messages between my computer and the board. Due to the ...
3
votes
1answer
95 views
How do IOT platforms like Blynk, ThingSpeak etc. communicate with hardware (e.g. ESP8266) without port forwarding?
I use port forwarding if I want to access my local server NodeMCU from internet. However if I use IOT platforms like Blynk, ThingSpeak... then I dont need to care about port forwarding. We can access ...
3
votes
0answers
54 views
What IoT services are available for free that does not have message rate limit?
let say my other device publishes messages every 10ms (trying to show a real time graph in mobile app) sending at slower rate i.e every 1s instead of 10ms would result to wrong output.
Are there any ...
0
votes
0answers
21 views
Issue with NodeMCU Deep Sleep mode
I want to create an IoT device which consumes less energy when no sensing is required. For this I have tested the NodeMCU in deep sleep mode as specified in the article on randomnerdtutorials.com ...
3
votes
1answer
181 views
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 ...
3
votes
1answer
470 views
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 ...
12
votes
2answers
267 views
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 ...
1
vote
0answers
29 views
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(...
1
vote
1answer
101 views
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 ...
2
votes
1answer
50 views
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 ...
1
vote
0answers
37 views
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
4answers
864 views
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
0answers
43 views
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 sturggled for the connection of ESP8266 to Arduino Uno . Finally its ...
1
vote
1answer
60 views
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 ...
0
votes
2answers
42 views
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 ...
2
votes
1answer
251 views
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 ...
1
vote
0answers
254 views
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
2answers
821 views
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 ...
6
votes
3answers
348 views
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 ...
4
votes
0answers
88 views
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 ...
4
votes
1answer
131 views
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
votes
2answers
243 views
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 ...
2
votes
0answers
106 views
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 ...
3
votes
2answers
134 views
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
vote
1answer
171 views
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 ?
6
votes
1answer
153 views
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) ...
6
votes
2answers
109 views
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 ...
7
votes
3answers
3k views
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 ...
4
votes
1answer
94 views
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
2answers
120 views
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
2answers
499 views
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
1answer
336 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
2answers
226 views
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,...
