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I've started doing some hardware hacking as part of my new job, I'm amazed at what is available these days. This NodeMCU costs about $5, has built in WiFi, is programmable through the Arduino IDE and can be powered by a small solar panel. I'm blown away.

@mhall119 If you get the ESP8266 bare, you can grab 'em for about $0.75.

Harder to work with, of course, but unimaginably cheap.

@ajroach42
For testing or hobby purposes I would pay $5 every time to save time and frustration.
@mhall119

@kelbot @ajroach42 Yeah, if I was manufacturing stuff at scale I'd definitely go that route, but not for prototyping/hobby projects. I got a 3-pack of the NodeMCU off Amazon for about $16 USD, it's certainly worth the extra for the ease of working with them.

@mhall119 @kelbot For sure. I have a couple of the NodeMCUs kicking around for exactly that reason.

@ajroach42 It's crazy what $0.75 worth of electronics can do these days, isn't it? Really makes the whole Internet of Things revolution possible

@mhall119 Here is an ESP32 board from WeMos...even smaller, more powerful and similar cost. Not as well supported in Arduino IDE yet but super cool nonetheless...

@gemlog Wow, we're going to have entire computers the size of an SDCard soon

@mhall119 If you don't need a display, that pretty much *is* an entire computer. couldn't you ssh in on the usb connector? Am I wrong maybe?

@gemlog You can probably use screen to connect via serial console on USB (I do that with my NodeMCU), but it doesn't look to have on-board WiFi or Ethernet capability

@mhall119 yeah, I did notice that, but you could still compute with it.
Yes, it's not very useful without other network connectivity.
However, it depends what you are doing. I once created a fairly complicated set of network scripts using only my pc and a sharp zaurus (because that's all I had).

@mhall119 Let's ask @uaa what he's doing with it -- he's who I learned about it from.

@gemlog @mhall119 well, I don't know why I called to this thread but exactly I have Lichee Pi nano. This board (LPi nano) does not have any network connection but LCD/audio capability.
I think this board is for old ARM (not Cortex but ARM9 core) fans. Here is the processor F1C100s datasheet, please read this and check whether this SoC fits your project. linux-sunxi.org/images/b/ba/F1

@uaa @mhall119 @gemlog
It is because you introduced us to this board and we wondered what your project would be.

@gemlog @gemlog @mhall119 my project... Simply I want to play wih old ARM9 CPU core, not modern Cortex. Now I am trying to port KOZOS, a tiny embedded OS for education. (web page is written in Japanese) kozos.jp/

@mhall119 NB it's 5am in Tokyo and he usually answers late at night his time.

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