fablabbcn/smartcitizen-kit-21: 0.9.8-PM

This release includes changes to support the new PM sensor batch behavior (zero readings problem), and some other fixes:

• Fix PM reporting zero on first two readings
• Needed for old PM sensors: longer Serial timeout, more strict command verification, and clearing buffer
• Avoid turning off PM sensor on sleep when reading interval is too short
• Implemented PM passive mode
• Added PM send command function
• Added PM send command retry
• Added PM sensor debug messages
• PM last reading now uses rtc instead of millis and warmUp as trigger period
• Empty Serial buffer on getReading to be sure no old data is consumed
• PM old sensors set passive mode on each wakeUp and add small delay between commands
• Added Support for external SHT35 Temperature and Humidity sensor
• Updated some Libraries
• Some minor fixes in building and flashing script make.py
• Updated production test code
• Fix typo on new read interval evaluation
• Fix disabling urban sensors persistence
• Fix error on enable/disable PM/PN sensor groups
• Added Sd card detection debouncing
• Fix Sanity reset not always triggering
• Longer (10 min) force publishing every minute period.

Full Changelog: https://github.com/fablabbcn/smartcitizen-kit-21/compare/0.9.8...0.9.8-PM

To update your kit you can follow this guide, only SAM update is needed.