$5 WiFi module

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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

ESP8266 DATASHEET

Post by dlh »

This is the most complete ESP8266 datasheet that I've been able to find.
http://dl.itead.cc/IM151116002/0A-ESP82 ... s_v4.1.pdf
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Post by dlh »

I just received these ESP8266 based devices. I don't have time to play with them right now but will report here once I do. There's an Android app (iOS is coming) for WiFi control but you need to buy a separate RF remote for 433MHz RF control.

https://www.itead.cc/smart-home/sonoff- ... witch.html
https://www.itead.cc/smart-home/slamphe ... older.html
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Post by dlh »

The ITEAD devices seem to have the ESP8266 integrated into their circuit rather than as separate PCBs like we've been seeing.
http://dl.itead.cc/IM151116002/sonoff-p ... ut-433.jpg
It makes me wonder whether it's possible to put such devices into download mode in order to create your own custom applications. The Serial-TTL chip would seem to point in that direction. The schematic shows TX, RX, EN, RST & GND.

There's a schematic here...
http://wiki.iteadstudio.com/images/6/6b ... hmatic.pdf
It has 1MByte flash plus an 8-bit microcontroller (which handles the 433MHz RF receiver) in addition to the 32-bit ESP8266. The 8-bit microcontroller is quite impressive in its own right.
http://www.mouser.com/pdfdocs/EFM8BB1_DataSheet.PDF
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Another WiFi Device

Post by dlh »

Here's another inexpensive WiFi device.
https://www.itead.cc/smart-home/sonoff-sv.html
It appears to be based on this...
http://forums.legitreviews.com/viewtopic.php?t=12374
which, after looking at the schematic is an ESP8266.
http://wiki.iteadstudio.com/images/3/3b ... ematic.pdf
Details:
http://wiki.iteadstudio.com/Sonoff_SV
It looks like Itead Studio is planning a collection of low cost, ESP8266 based devices.
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Official ESP8266 English datasheet v4.3

Post by dlh »

http://www.esp8266.com/wiki/lib/exe/fet ... n_v4.3.pdf

i was not aware that the chip natively does 38kHz IR TX/RX (with modulation/demodulation) using the NEC protocol.
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Post by dlh »

The ESP8266-based Sonoff relay (link above) is field upgrade-able so that probably (?) means we can create our own firmware.
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Post by dlh »

There's a User Manual for Infrared IO at...
https://espressif.com/en/file/396/downl ... n=sXmVIx7P
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Post by dlh »

I think this English language homepage is relatively new for Espressif (who make the ESP8266). There's a lot of info, including a link to their template for a cloudless smartphone app.
https://www.espressif.com/en
https://www.espressif.com/en/products/s ... p/overview
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dlh
Posts: 395
Joined: 15 December 2006, 12:12 PM
Location: ~Cincinnati

Post by dlh »

Here is a great resource for understanding the ESP8266 API and capabilities.
https://www.espressif.com/en/media_over ... ok-esp8266
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