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Questions tagged [esp8266]

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

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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 ...
Timmy's user avatar
  • 171
5 votes
0 answers
135 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 ...
guyd's user avatar
  • 871
5 votes
0 answers
285 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 ...
Stuart Fong's user avatar
3 votes
0 answers
492 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 device. Surprisingly, a LWT is not sent to designated topic. code has not actual ...
guyd's user avatar
  • 871
3 votes
0 answers
119 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 ...
Amir Pournasserian's user avatar
3 votes
0 answers
425 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 ...
Tim's user avatar
  • 131
3 votes
0 answers
66 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 ...
SoraCode's user avatar
3 votes
0 answers
123 views

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 ...
Chris Steinbach's user avatar
3 votes
0 answers
551 views

Can I enable interrupts on GPIO16 of ESP8266?

Usually, the gpio16 is not used as gpio. But we can read the state or change the state by writing directly to the registers. WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) &...
Andrew Romanenko's user avatar
2 votes
0 answers
69 views

Where is the partition table on ESP8285 (Tasmota)?

Background I'd like to replace the Tasmota firmware of a WiFi Socket with my own firwmare. The TTL port of the ESP8285H16 (=ESP8266 + 2MB flash) is not accessible without braking the case and I need ...
Sim Son's user avatar
  • 139
2 votes
0 answers
56 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 ...
BrainTrance's user avatar
2 votes
0 answers
223 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 ...
guyd's user avatar
  • 871
2 votes
0 answers
1k views

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 ...
Ahmed's user avatar
  • 21
1 vote
0 answers
77 views

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 ...
29472926448's user avatar
1 vote
0 answers
152 views

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 ...
DevBee's user avatar
  • 21
1 vote
0 answers
178 views

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 ...
DevBee's user avatar
  • 21
1 vote
0 answers
62 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%)...
Ouroboros's user avatar
  • 111
1 vote
0 answers
72 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 ...
DEEPPRAKASH PATHAK's user avatar
1 vote
0 answers
694 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 ...
user379468's user avatar
1 vote
0 answers
201 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(...
copsterr's user avatar
1 vote
0 answers
76 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: #...
MAKHAM NAGA BHAVANI's user avatar
1 vote
0 answers
76 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 struggled for the connection of ESP8266 to Arduino Uno . Finally its ...
MAKHAM NAGA BHAVANI's user avatar
0 votes
0 answers
92 views

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 ...
Peter Rottengatter's user avatar
0 votes
0 answers
44 views

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 ...
Nstevens's user avatar
  • 101
0 votes
0 answers
201 views

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 ...
Abraham's user avatar
0 votes
0 answers
605 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 ...
Aishwarya's user avatar
0 votes
0 answers
49 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 ...
Dharshinii Ravikumar's user avatar
0 votes
0 answers
38 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 ...
CHETAN NIRADWAR's user avatar