Questions tagged [esp8266]
For questions about the ESP8266 microcontroller unit, including programming it or using it in an IoT context.
29
questions with no upvoted or accepted answers
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answers
920
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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 ...
- 161
4
votes
0
answers
129
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 ...
- 771
4
votes
0
answers
282
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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 ...
- 141
3
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0
answers
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 ...
- 771
3
votes
0
answers
113
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 ...
3
votes
0
answers
404
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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 ...
- 131
3
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0
answers
66
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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 ...
- 31
3
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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 ...
- 684
2
votes
0
answers
51
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 ...
- 21
2
votes
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 ...
- 771
2
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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 ...
- 21
2
votes
0
answers
539
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) &...
- 137
1
vote
0
answers
52
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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 ...
- 11
1
vote
0
answers
123
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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 ...
- 21
1
vote
0
answers
142
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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 ...
- 21
1
vote
0
answers
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%)...
- 111
1
vote
0
answers
67
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 ...
1
vote
0
answers
654
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 ...
- 119
1
vote
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(...
- 11
1
vote
0
answers
71
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:
#...
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 ...
0
votes
0
answers
18
views
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 ...
- 1
0
votes
0
answers
13
views
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 ...
0
votes
0
answers
81
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 ...
0
votes
0
answers
39
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 ...
- 101
0
votes
0
answers
185
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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 ...
- 1
0
votes
0
answers
561
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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 ...
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 ...
0
votes
0
answers
37
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 ...
