ESP8266 Community Forum

- Sun Mar 08, 2015 7:52 am #11575 Hi. My name is Steve. I live in London UK. I am having trouble uploading Firmware. I have tried several firmwares but all the flashers I have used flashers (i have tried 4 different programs) all come up with "Invalid Head of packet." Is there a simple solution for this? Or is there any solution??

- Sun Mar 08, 2015 11:20 am #11586 Hmm.
I tried flashing several different versions of the NodeMCU firmware. The only one I mamanged to get to load 100% was a 0.92 version... All the rest had packet problems. Not sure why though..

- Sun Mar 08, 2015 12:43 pm #11590 Hi,i haves same problem,solving after using 3.3v from 5v (voltage regulator),and setting port speed to 9600bps flash any time without problem.Probably you use 3.3v from programer ,it's only 50ma ,not enough for esp.

- Mon Mar 09, 2015 8:50 am #11656 Ji H4u. Yeah, I did consider that current might be a problem. I'm using this board here: http://www.widgethub.co.uk/products.php?catagory=3&product=109
Which takes the 5v from usb and regulates it at 3.3v
I guess my laptop's USB current is too low....