#format wiki
#language en
== particle.io wifi core, temperature monitoring using ds1820 ==
 * Links [[Arduino/DS18B20TempSensors]] [[http://arduino-info.wikispaces.com/Brick-Temperature-DS18B20]] [[https://docs.particle.io/reference/firmware/core/|reference]]
 * [[https://docs.google.com/spreadsheets/d/1dfj7w1nSbOpQQPFPpH7gBdz-p198_zG9lmY9p4n8RxM/pubchart?oid=1683653898&format=interactive]]
 * 20151206 after reset Spark/Particle core lost connectivity again, just breathing green.
   * Set to yellow download mode, then 
   * $ sudo particle flash --usb deep_update_2014_06
   * Flashing magenta. From Particle android app, reflash Tinker, works after a while.
   * from https://build.particle.io re-flash program
   
 * bought a couple [[spark.io|spark]] core's through a kickstarter project, name changed to particle.io
   * been a bit disappointed, confusing documentation, lack of instructions, units stuck not connecting etc.

 * 201512 got firmware flashed onto cores, the connect to internet and particle.io android ap can switch a led on and off, going to try one wire temperature monitoring again.
    * https://www.hackster.io/AgustinP/logging-temperature-data-using-the-spark-core-b9c60c
 * 201512 - four core cable to 3pin ds1020,  
   * {{attachment:ds1820-digital-temp.gif||align="top"}}
   * pin1-GND(Yellow), pin3-vcc(Red), pin2-data(Green) with pull-up 4.7k resistor.


 * Go
   1. login into web builder [[https://build.particle.io]] , i can see my devices.
   1. start new project !TempMon
      1. add libraries 
         * ONEWIRE
         * SPARK-DALLAS-TEMPERATURE
   1. 
...