esp8266 iot & hw hacking · esp8266 v1 programmable microcontroller wifi soc designed by...
TRANSCRIPT
ESP8266
iOT & HW hacking
John Turner @wifijt
Adaptive Communications
[email protected] Formerly
Brandeis University
Aruba Networks
Tactical discussion NOT strategic!
Programmable Microcontroller
+ +
= Analog coolness
ESP8266 V1 Programmable Microcontroller
WiFi SOC
Designed by Espressif
Tensilica Xtensa LX3 processor
Targeted at iOT
Complete development
package
Built in Serial for Debugging
Apply power, Flash, Go
$1.25!!
What a Bargain!!
Out of the box it accepts AT commands • Join a network
• Create a network
• Dual mode!
• Mesh mode – with auto join and an easy
messaging function
• Open TCP/UDP connections
• Onboard webserver
• Even a built in EZ config mode!
• Set MAC addr. to whatever you want
• Sadly no 802.1x yet
Arduino libraries automate all of this!
- 19µA standby current - that makes 166mAh/year
- Waking it every hour for 300ms at 15mA makes
12mAh/pear
- Sending an email lasts about 40s at 67mA - this
results in 0.75mAh per mail
- Total draw is ~ 220mAh/year.
Low Power Mode
Typical AAA Alkaline has about 1000mAh
CR235 Coin Cell has about 190mAh
iOT devices! – lights, toasters, refrigerators, lawn mowers, watering systems, games! At
prices this low why not put one on your dog!
Testing rigs – how many devices do you bring with you to test a network?
WiFi Pizza with 500 Clients in a box – how well does that new controller code really work?
RF modeling – put one in every room – in every corner and use the RF as a client
modeling tool – leave them behind after your survey!
EVIL THINGS – throwable DOS device – code is out there for this – I’ve tested it!
How will you plan for the growth of IOT?
What tools do we need to manage this type of growth?
Ideas to do with the ESP8266
#WLPC 2017 Badges!
Ideas to do with the ESP8266
I