====== Laser Cutter Telemetry ======

Below are the laser telemetry initiatives for monitoring laser health and performance.

The goal is to have all of this information pushed into InfluxDB for analysis.


===== Laser access control =====

   * Monitor the power state of the overall system (is it on or off)
   * Monitor which user is currently logged in to the access control system

**Current status:** This system is governed by the Raspberry Pi and runs the software at https://github.com/vhs/vhs-laser-access. Unknown whether this data is being logged anywhere.

===== Laser tube =====

https://github.com/vhs/laser-mon

Monitors the realtime PWM output of the controller, as well as whether the laser is firing or not. These two metrics, when multiplied, show the total power delivered to the tube.

**Current status: Working** 

**Future work:**
    * Monitor actual current draw of the tube (expected to be ~27mA max)


===== Exhaust =====

https://github.com/vhs/laser-exhaust-mon

Monitors the pressure differential before/after the filter system to know how clogged the filters are. Also monitors the temperatures, because why not.

**Current status: Working**


===== Water cooling =====

https://github.com/vhs/laser-cooler-mon

    * Monitor the water temperature on inlet and outlet of water recirculation loop.
    * Monitor flow rate of coolant
    * Monitor coolant levels

**Current status:** Monitoring inlet/outlet temperatures only