Troubleshooting NodeMCU (ESP8266) Arduino Uploads

This is a quick troubleshooting video to help you fix pesky uploading errors with the NodeMCU and other ESP8266 based boards.

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[vaderGSG]

It really helped me a lot, learning about the settings for flashing. Although I could not solve the failure of my NodeMCU, I bought another and I have used it a lot and without fail thanks to these tips.

[yamahar]

dude I was banging my head for 4 hours trying to find my problem. your last tip saved my day. thank you alot

[prankulwadhwa]

Bro the last step actually worked
Thanks man finally the error is gone🔥🔥

[abir]

you're a life savior!
I changed the "Flash Size" settings to make it similar to yours (it used to be 4MB(FS: 2MB OTA....) now it's 4MB(FS:3MB OTA....)
then I've pressed the Flash button, and shortly after I've pressed the Reset button as you said.
it worked perfectly!
PS: THE MESSAGE "Leaving...
Hard resetting via RTS pin..." DID NOT DISAPPEAR IN MY CASE, BUT THE CODE STILL WORKED!

[brucehausmann]

I'm building the Morphing Digital Clock by Hari Fun and thought I had all of the correct libraries/sketches installed. I get the Leaving... Hard resetting via RTS pin... message, It shows I'm at 9600 baud and the serial monitor is blank. Appreciate any help. I am a total amateur at this. When I hit the reset on the esp module, the blue light blinks along with one LED on the display that blinks red in sync.

[brianluedke]

I have completed your installation for the RGB permanent Christmas lights, but when I go to flash the Node MCU it states that there was an error, no port found. I tried to reset it and flash it at the same time, I even restarted my computer and reloaded ESP flasher twice. Is there a certain pin on the node MCU that I have tot ground or something to activate the card? Also, I have attached my control wires for my lighting zones to D1 and D2, would this affect anything?

[shawnennis]

THanks....My ESP8266NodeMCU was stuck for days. The hold flash and reset I think was the key. It magically began communicating again. FUSSY little board.

[shashankhs]

Sir I am facing Hard rest Via RTS and the code won't get uploaded can you help me with that?

[yuerbubao]

I saw in your upload speed there's a 9600 choice. How did you make it? I want to add a 9600 baud choice to NodeMCU1.0(ESP12-E Module), but I don't know where I kann modify it.

[shahbaztech]

Sir I have got the error compiling for board NodeMcu 1.0 (Esp 12E Module).

[careenpakyntein]

my error is regarding connecting led light with nodemcu esp8266 in a breadboard without resistor i have done these steps in the video but at the end of uploading its says leaving... hard restting via rts pins

[simonburke]

Thanks for all your vids, you are helping me to understand the IoT. When I try upload a sketch from the Arduino IDE I get an error: "write timeout - board does not exist or your board is not connected to nodemcu". I have added the additional boards manager, selected the correct board, selected the port and checked the speeds are as recommended. The board shows up in serial monitor and displays boot mode, waiting for host. Can't figure out what I'm missing here, do I need to push or hold a button on the node mcu or something? I've tried different ports and USB cables with no luck.

[k.v.saimadhav]

espcomm_upload_mem failed
Can you explain this error in NodeMCU ESP8266.

[jakobtinhofer]

I am getting the following error: could not open port 'COM3': PermissionError(13, 'A device attached to the system is not functioning.', None, 31)" whenever I try to upload to the nodemcu. Resetting did not work, and I also cannot open the serial monitor. When I try, I get "Error opening serial port 'COM3'. (Port busy)". Could this be due to faulty drivers? Which ones do you use?

[TECHBUSTERNAMAN]

Thankyou sirrr i am still crying i was just panicked thank you I RECOMMEND EVERYONE TO RESET THANKYOUUUU😄😄

[ananddhanesan]

Thankyou so much mann💗.. The last step solved the issue.. Prayers and God bless you

[freddyavendano]

Hi there I’m running my arduino in os and the thing is I’m playing around with a photoresistor en the serial monitor works fine but as soon as I build a simple circuit with LED’s and the photoresistor there is no output from the serial monitor

[samharding]

Hi mate ive uploaded the nodemcu flasher but it puts me on comport 1 and when i press the flash button it doesnt flash it says no wifi connection even though i do please help many thanks

[alanthomas]

have problem with nodemcu.i have uploaded home automation program.it works well but after making google assistant on ifttt it showing wifi is connected and disconnected continuously.what's the solution?

[Kholaslittlespot]

I have an issue. Port settings are greyed out for me. I've installed the CH340G drivers and the CP210x drivers. I also have slightly different settings available, for insance I can find the memory option you had with "SPIFS" or whatever it was.

Thanks if anyone can help (I'm using the 1.8 Arduino ide)