Questions tagged [esp8266]

For questions about the ESP8266 microcontroller unit, including programming it or using it in an IoT context.

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31 views

Sending email to customers [closed]

I am trying to develop a smart energy meter project in his the energy consumption and bill amount are calculated by Node mcu and sends data to cloud ,the cloud database should send this data to ...
9
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1answer
1k views

Controlling ESP8266 via Raspberry Pi through MQTT

I am working on a home automation project. The basic objective of my project is to control relays and other sensors located at different locations. I have set up my Raspberry Pi as an MQTT broker. ...
5
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1answer
1k 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 ...
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22 views

Esp01 Program Uploading issue

I am trying to program ESP01 module with cp2102 USB to TTL converter, I successfully programmed it earlier Using logic level shifter i.e. resistor divider on rx and providing 3.3 v externally ** My ...
2
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1answer
39 views

IoT Dashboard for customers (data comes from Arduino)

I push my sensor readings from product A, B, C, D to an online cloud provider. Then my customer (call him E) needs to access all these sensor readings and make a dashboard for his customer X, Y Z. ...
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31 views

Using more than one channel Relay with ESP boards starts fluctuations after 4-5 minutes

I'm new to IoT. I'm trying to connect more than one device to relay and control via ESP board(tested with esp8266 and esp32), I'm using mqtt connecton for signaling. So here's whats happening If I ...
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32 views

Are Node MCU or Wemos D1 mini stable

To give some background, I created a WiFi IoT device using ESP 11E/F. I was doing basic stabilization using capacitors and resistors, and although some chips mostly were working okay, some chips (~50%)...
1
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2answers
34 views

How to control an ESP8266 via the Wi-Fi?

Summary I would like to build (ideally based on ESPHome) a device with a buzzer I can trigger remotely via the network. Context I have several systems built around my home automation system: Home ...
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0answers
28 views

Esp8266 unlinking very fast [closed]

Pls how do I get the length of the following GET request GET /data/2.5/weather?q=San%20Francisco,us HTTP/1.1\r\nHost: api.openweathermap.org\r\n\r\n\r\n GET /api/weather/insert.php?temp=74.6&him=...
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1answer
50 views

Sonoff basic R3 DIY

I have read through a few blogs and watched videos of setting up the R3. What I have accomplished to date is the following: Paired the R3 with ewelink cell app. I can turn it on and off from the app. ...
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1answer
84 views

ESP OTA from Github

I want to be able to program my ESP32 (same for ESP8266) remotely, I have used ArduinoOTA without problems, and I can upload the file into the ESP selecting the local file that I want to flash. ...
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11 views

I'm getting an error while uploading my code to esp8266 via an arduino (FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error)))

Arduino: 1.8.13 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), dtr (aka nodemcu), 26 MHz, 40MHz, DOUT (compatible)...
10
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3answers
1k views

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 ...
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75 views

How to connect the bridge node of painlessmesh to AWS IoT Core to publish message via MQTT?

Background: I am trying to work with two ESP8266 nodes using the painless mesh. Until now the painless mesh worked fine. At next level i made one of the node as bridge or root node. My intention here ...
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23 views

Mini weather station project not working

I have been trying to do this project for 2 weeks. The project is about mini weather station. It uses esp8266, DHT11 sensor,BMP180 sensor and FC 37 rain sensor. I have taken reference from the ...
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1answer
55 views

Connect to ESP8266 outside network, not using portforward or VPN

I am looking for a way to connect to my ESP8266's web server without being connected to the same network as it. Also, I want to be able to connect to it without using the port forward or VPN tunnel ...
0
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1answer
83 views

switching setDebugOutput off on esp8266

This thing is driving me nuts. I tried to debug my MQTT secure connection on nodecmu. Following some post from year 2015 I was switched on debugging output with Serial.setDebugOutput(true). Now I ...
4
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1answer
82 views

Open source framework for ESP8266 to work with Amazon Alexa and Google Assistant

I'm working on a multi channel sonoff device with ESP8266. I want it to be able to support popular iot home control platforms such as Amazon Alexa, Google home... It must have a button and share ...
16
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2answers
475 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 ...
4
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2answers
62 views

Temperature sensors: DIY ESP8266 vs product

I want to deploy few temperature sensors in my flat: few rooms, two balconies, one outside. Sensors should send data into my server (thinking about Rpi with Prometheus DB and Grafana dashboard). ...
2
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2answers
526 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 ...
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1answer
56 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 ...
3
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0answers
182 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 ...
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41 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 ...
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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 ...
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1answer
33 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
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1answer
70 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
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0answers
28 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
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1answer
208 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 ...
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0answers
187 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 ...
9
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2answers
976 views

Sub milisecond timer for ESP8266 in Lua

I'm trying to make a remotely controlled servo motor controller on ESP8266 which is controlled by a server. The problem I'm facing is how to make an asynchronous timer, like tmr.alarm(), but in ...
7
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3answers
5k 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 ...
1
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1answer
222 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 ...
3
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0answers
102 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
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1answer
96 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
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1answer
115 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 ...
2
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2answers
201 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 ...
3
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0answers
38 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
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1answer
57 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 ...
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0answers
77 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 ...
3
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1answer
141 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
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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 ...
5
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2answers
617 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 ...
3
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1answer
329 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 ...
7
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4answers
2k 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
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0answers
50 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(...
2
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1answer
54 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 ...
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0answers
38 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: #...
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0answers
46 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 ...
0
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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 ...