espcomm_upload_mem failed
The most common error which occurs while uploading code to your esp8266 device.
In this video, I have show the steps to rectify this error.
Even if you have not faced this error then also I’ll suggest you to watch this video as I have explained some important connections and their reason in this video
Hope this video helps
https://youtu.be/drZQStOjpgI
#techiesms #esp8266 #nodemcu