Questions tagged [esp8266]
For questions about the ESP8266 microcontroller unit, including programming it or using it in an IoT context.
123
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Flashing Athom Wall plug ESP8285
I'm trying to re-flash an Athom plug (bought pre-flashed with HomeKit firmware) using FTDI adapter.
Shown here is the exact ESP8285 (different plug sub-model). AFAIK ESP8285 is a similar MCU to ...
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235
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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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ESP8266 with Dual Relay AND STM8S103
I'm looking for an ESP8266 board with a dual relay for one of my projects. Yes a Sonoff Dual - quite answers all my needs, beside the part of messing around with soldering and the for need more GPIO's ...
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How to use a tp4056 and a lithium battery on an esp8266
I am new to IOT and I would like to have your opinion on my wiring, I want to power my project with a lithium battery for that I use a tp4056 to charge my battery but also to power my breadboard I ...
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Shelly 2.5 webui not available
I’ve bought a pack of Shelly 2.5 from eBay. It seems they are some kind of special edition since they come with HomeKit support. The HomeKit id is printed on the device. Even though it’s not ...
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2k
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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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Alexa drops lamps and switches regularly
I have used fauxmoESP, Espalexa and Tasmota for a couple of switches and lamps. What I see is that Alexa drops those units after some time. Starting discovery then again finds the units and the cycle ...
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492
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LC Technology Relay x4 Reset to Mode 1?
Hi have a LC Technology Relay x4 board with a custom-firmware (using ESPHome) on the ESP01 attached to it.
As a curiosity, I pressed on the S1 switch to see if it's doing something. The "normal&...
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Mqtt in production
I am using Mqtt to build a project. I am wanting to move my whole work to prod ready.
My hardware is ESP-07 and custom PCB design the broker is mosquitto the app (Nodejs,react native)
I implemented ...
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ESP8266 bin files and memory layout - why multiple bin files in ESP MCU development process
I see that as per the link https://github.com/esp8266/esp8266-wiki/wiki/Memory-Map, in SPI flash ROM layout table (without OTA) there are 5 bin files that are flashed to esp8266. Though there are ...
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ESP32 or ESP8266 220v button as input
As per title I'm, looking a way to detect the press of a button powered at 220v ac through a gpio pin of the ESP32.
The simplest solution found seems to be an octocoupler, but are there devices that ...
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Bare metal or Non OS SDK setup for ESP-01 ESP8266 - Issues in setting up (esp dev toolchain on ubuntu 20.04 virtual box )
I bought ESP 8266 ( ESP 01 ESP 8266) online as I wanted to start development from scratch (direct flash from laptop instead of using arduino, not to use rtos but as much baremetal as possible).
As per ...
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Serial (UART) WLAN bridge with ESP8266
I have an installation with an MCU with proprietary (unfortunately) and immutable firmware, that provides a serial interface to connect a PC or laptop to. Planning to make it accessible via the ...
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Can I use an ESP8266 as an MQTT broker?
I am making a home automation project based on star topology. What I am trying to achieve is that one of the nodemcu/ESP8266 acts as a server which is accessible for the outside world and other ...
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Can the relay be controlled over serial on the ESP8266 WI-FI?
I recently purchased an ESP8266 WI-FI which looks similar to this but is actually this one with the extra row of pins by the serial lines. I'm following along with the instructions on the first page ...
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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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Temperature sensor MLX90614 read object temperature above 300°C
I want to make sure the sensor read normally but when i run it to read the object temperature, the result is 382.19°C. I have search for tutorials, and also the error but i couldn't find it except for ...
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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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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 ...
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2
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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 ...
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What is the 'auth token' in Blynk?
In the below Blynk program, they have used the line:
char auth[] = "76aeba5832304e10917b4e1748c34039";
What is mean by the 'auth token'? Why is it required for Blynk to function correctly?
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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 ...
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458
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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 device. Surprisingly, a LWT is not sent to designated topic.
code has not actual ...
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Can I make individual callbacks to handle each MQTT topic?
I'm using the PubSubClient on some ESP-01 modules to make smart/connected devices around the house. I'm not super fond of the way all incoming messages get routed to the single callback. When I get a ...
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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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6
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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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90
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Trying to read thermostat value controlled by Alexa with ESP8266
this is my situation:
I have a thermostat in my bathroom which is controlled by Alexa. Now I want to automate my ventilation. For this I want to use a ESP8266 NodeMCU with a humidity sensor and a ...
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How to use MQTT on Arduino which uses serial com to send AT commands to ESP8266
I just started looking into MQTT protocol.
Situation
In my college project, currently, I use Arduino as main MCU and do every work in that and use Serial Comm. to send AT commands to esp8266 (for ...
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260
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How many machines do I connect to a single WiFi router?
I have 10,000 machines (to make jute-bags), and each machine needs to send data to a remote server every 2 seconds. The data consists of machine id, machine state and various other information ...
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69
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Lost power supply while flashing SONOFF S20
Yesterday I successfully flashed three out of four S20 v2.1.0 devices with ESPHome firmware. While flashing the fourth one, I accidently interrupted one of the cables (most likely the power supply [3....
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ds18b20 reading oscillating [closed]
I have two ds18b20 connected in star topology (3m cable) to a wemos d1 mini inside a cold chamber and sometimes the temperatures are like following a sinewave. Any idea where that might come from ?
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49
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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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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. ...
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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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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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51
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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%)...
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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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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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1
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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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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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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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987
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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 ...
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696
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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 ...
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259
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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 ...
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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 ...
CommunityBot
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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). ...
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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 ...
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3
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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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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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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 ...
CommunityBot
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