ESP8266 Community Forum

- Wed May 20, 2015 1:41 pm #17990

Hi Cal:

Thanks, yes I was reading through that thread and wondered myself, especially since sometimes on power up during my testing I can see the module pull ~400mA. I'll find that link later this morning and give that firmware a try. I don't have the SDK installed or the toolchain as I was hoping I didn't have to go through all of that for my initial testing.

You're talking about thislink, https://github.com/chadouming/nodemcu-firmware, right?

George

Yes, always talking, never tried myself.

Get your modules here:

https://www.banggood.com/custlink/KvGGhGF4wG

- Wed May 20, 2015 3:07 pm #18001 OK, I haven't tried that version of NodeMCU but I did try the AT firmware as well as the micropython. Both of these seem to be working just fine with Vcc=2.8V. I did a little more testing with the AT firmware but I plan to do more with micropython as soon as I find the list of supported commands, especially how to use deep sleep.

One side note is that I could not flash the firmware with Vcc=2.8V, it does work with 3.3V (no surprises there) so it at least initially seems that flashing is more Vcc sensitive than operation.

I'll post more results as I'm able to gather them.

- Thu May 21, 2015 1:40 pm #18097 I flashed the other NodeMCU firmware mentioned earlier and that seems to perform much better. I'm able to issue a hardware rest as well as a soft reset with Vcc=2.8V and so far it has come back each time.

- Thu May 21, 2015 7:44 pm #18127 Well I spoke too soon. As soon as I started messing with WiFi the board won't function unless Vcc=3.3V. I may switch back to the AT firmware and run more tests with it to check if this really is a Lua issue or ESP8266 sensitivity.