ESP8266 Community Forum

- Thu Sep 24, 2015 2:36 pm #29806 I got some also. Lots of flash memory. Same amount of ram memory. I'd like to load the nodemcu integer instead of the float version. I'm using Nodemcu flasher. Can anyone tell me how to change setting on Nodemcu flasher to load nodemcu integer viersion?
Thanks for any help.

- Sun Sep 27, 2015 1:51 pm #29993 Hi, I got a few of these off of ebay around the beginning of August and today I finally had the time to mess with them.

The package came with each module sealed in an anti-static bag and for each module, an expansion board+pin headers were also included, like in the picture below:

http://internetofhomethings.com/homethi ... -apart.jpg

I found a bunch of websites detailing how to solder the module to the expansion board plus the connections to make in order to communicate with the module - but three modules soldered, and no response at all on minicom.

I was about to consider a faulty batch or something, when I noticed that the expansion boards had three connector holes towards the bottom left of the expansion board:

- one is right between the words GPIO13 and VCC
- the other two are vertically aligned, at center bottom of the board

Directly connecting the one between GPIO13/VCC and the vertically lowest of the other two made two modules work and I was able to flash them with nodeMCU:
- the flashing at 9600 baud rate did take its time though (several minutes operation)
- so far, a day has gone by and they keep on working

Still I'm not sure what those are for and my electronical skills aren't that solid as well.

Does anyone know what those connectors are for...? Did anyone else need to do anything similar to this to get the modules running...? Have I missed something with the setup?

I use minicom with S/W flow control off + 9600 baud to communicate with the modules, same settings as with ESP8266-01 which I also have and are running properly.

- Sun Sep 27, 2015 4:08 pm #30008

Does anyone know what those connectors are for...? Did anyone else need to do anything similar to this to get the modules running...? Have I missed something with the setup?

The holes are just vias. The pads on the back are intended for a voltage regulator (SOT-89 package).
In its default configuration, the board will work without a regulator (if you want to add one, you have to remove the 0 ohm resistor on the top side).

- Mon Sep 28, 2015 5:33 am #30039

Does anyone know what those connectors are for...? Did anyone else need to do anything similar to this to get the modules running...? Have I missed something with the setup?

The holes are just vias. The pads on the back are intended for a voltage regulator (SOT-89 package).
In its default configuration, the board will work without a regulator (if you want to add one, you have to remove the 0 ohm resistor on the top side).

Using the default configuration + adding the regulator on the back, which component is the 0 ohm resistor on the top side, to be removed?

Thanks in advance!