v0.5.7

Touchstone Release v0.5.7

Changelog:

Hardware:

• Replaced ADMP401 with mini electret microphone (with large gain)
• Added supporting analog circuit for the new mic, including OP-AMP
• Removed some vias from underneath the MCU (paste was leaking through)
• Some routing and silkscreen updates

Firmware:

• Updated firmware for electret mic

v0.56b

Touchstone Release v0.56b

Changelog:

Hardware:

• Rerouted D9 trace to be SET pin for PM sensor instead of PWM pin for CO2 sensor
• Added 10K pull up on D9
• Moved components away from light sensor and RGB LED's light pipe's path
• Added extra vias all around for more ground stitching
• Moved CO2 sensor up the board
• Updated library for light pipe
• Adjusted components around the light pipe
• Some silkscreen and trace adjustments
• radio shifted to allow space for the light pipe to land

Firmware:

• Changed call to initialize CCS811 sensor in setup - it was being constantly polled in loop - probably resetting readings every time