Internet of Things Stack Exchange
Internet of Things Stack Exchange

Questions tagged [esp8266]

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

Is a today obsolete, ultra low cost microcontroller from the Chinese company Espressif. Today superseded by its successor, .

Features

  • 32 kB instruction RAM
  • 80 kB data RAM
  • up to 16 MB expernal SPI flash
  • 802.11 Wifi
  • 16 GPIO pin

References

124 questions
11
votes
2 answers

Intercom ring notifier with ESP8266

My project idea is to attach "something" to my Intercom and when it receives an electric signal (someone rings the door bell), contact a local web service in a home server and that server sends a push notification to phones. The part of the project…
Mulflar
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10
votes
2 answers

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 microseconds. tmr.delay() doesn't work so well,…
Raitis Bērziņš
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10
votes
1 answer

Can't Flash ESP8266 latest firmware, says "Fast Flashing error" and "Invalid head of packet(' ')"

I can't figure out how to flash the firmware found on http://www.electrodragon.com/w/ESP8266_AT-Command_firmware. I am using ESP8266 Download tool v3.4.4. When I am adding a firmware in download path it goes on till a fixed percentage (77 or…
Salim Shamim
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5
votes
0 answers

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 file to access. OK connect to 192.168.4.1 ,…
guyd
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5
votes
2 answers

Can I upload code to NodeMCU without using micro USB?

Is there any way for me to upload code to NodeMCU without using micro USB? I tried to connect RX TX (NodeMcu) along with TX RX (Arduino) but it failed.
fady malak
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4
votes
2 answers

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, and got connected to. But from here, I couldn't…
guyd
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3
votes
1 answer

How to control multiple ESP-01 with an app?

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 the light intensity and other functions. So, I…
Mr. Nobody
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3
votes
0 answers

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 the CCS811 gives weird values So far, I've…
Tim
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3
votes
2 answers

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?
a-c-sreedhar-reddy
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2
votes
1 answer

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 found a similar project but it is not written for…
sai vamsi
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2
votes
1 answer

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 with the following solution: I have a website…
Slaven Tojić
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2
votes
0 answers

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 in this procedure, mainly what is the functionality…
guyd
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2
votes
0 answers

ESP8266 programming without USB cable

I have a sensor which is connected to an ESP8266 WiFi module and is supplied power through a MB102 breadboard power supply, which takes its power from wall adapter. It is not connected to a computer physically. It runs on my home WiFi network. I…
Shreyas Mishra
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2
votes
0 answers

How to connect to an ESP8266 via public address?

Can we connect to an ESP8266 (through the internet) knowing its local and public IP addresses without setting the WiFi modem to which it is connected?
user5747
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1
vote
1 answer

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 ESP8266 regarding pulling down GPIO0 to GND prior to…
guyd
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1
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