ESP8266: Difference between revisions
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Revision as of 11:56, 29 January 2015
ESP8266
The ESP8266 is a small, low-cost wifi-talking board. It's the new center of the Internet of Things. Originally intended as a "wifi modem", it exposes the WiFi interface over AT-style commands.
Some hackers immediately noticed there is a general-purpose microcontroller on the box, and made a firmware for it that takes Lua programs. Now you don't need another microcontroller. Sweet!
Hardware
For full specs, see [1]. Important facts:
- 3.3v *only* - 5v will let out the majikul smoke
- Some reports say 1A current draw, others say 250 mA
- Talks 802.1n, supports most major auth types.
There are a number of ESP8266 hardware versions. The ones of interest are:
- ESP1: 8 pins (basically one I/O plus power, etc.). Breadboard friendly (2.54mm), but not useful standalone
- ESP12: 16 pins (I/O, power, 9 GPIO). Non-breadboard friendly: 2mm pin spacing
Software
Folks seem to use NodeMCU, a Lua based firmware, when using the ESP alone.
Group order 01/2015
Prices are from the same store, and are competitive within a few cents.
- ESP-12, Without breakout (Option A): $2.60 aliex
- ESP-12, with breakout board, battery socket, resistors, and power regulator (2.54mm pitch): $4.50 aliex
Order Participants
Put your name, email, and quantity of With and Without breakout desired.
Name | No Breakout | Breakout | |
---|---|---|---|
Casey | c1@caseyc.net | 0 | 3 |
Adrian | adrian@freebsd | 0 | 5 |
Naomi | naomi at nthmost | 0 | 4 |
Dana | dsniezko at sonic net | 0 | 7 |
Patrick | p@trickod.com | 0 | 4 |
Les Jones | 0 | 2 | |
Brad | brad.schwagler at gmail | 0 | 2 |
Torrie | tdfischer at hackerbots | 10 | 0 |
Jake | jake at spaz odt org | 0 | 2 |
Henner | h.zeller at acm.org | 10 | 0 |
John E. | neurofog@gmail.com | 2 | 0 |
Yer name | Yer email | -1 | -1 |