My gear and canopy warning indications are through Dynon's EMS220 which give indications on the panel and audible warnings through the audio panel. For the landing gear, I made a voltage divider circuit out of resistors and connected it to the yellow wire going to the landing gear switch, the other side of the voltage divider connects to ground and the middle wire goes to the EMS220 contact. The voltage divider reduces 12 volts to less than 5 which is what the EMS220 contact I used is rated for.
Functionally, the "Check Gear" and "Gear Overspeed" audible warnings work well with the caveat that it takes about 20 seconds for the gear to fully extend, so getting the "Check Gear" on final may require a go around if there's inadequate time to extend the gear.
The canopy warning uses a magnetic door reed switch and the latch lever as contacts to complete the circuit. A file was created and loaded into the Dynon HDX that only warns audibly about the canopy if the RPM goes over 1900 RPM while the canopy not latched.
A quick video of the HDX setup for several widgets:
Here's an excerpt regarding the landing gear configuration from the Dynon Forum:
https://forum.flydynon.com/threads/landing-gear-up-warning.5098/
Make sure you're looking at the latest version of the manual. Here's the relevant excerpt from those pages:
Contacts Used for Retractable / Amphibious Landing Gear and Related Alerts
The simplest method to monitor landing gear state is to use a contact as there are only two states to monitor and it is mechanically and electrically easiest to install. To enable audio alerts related to landing gear status, the contact used for monitoring the status of landing gear must be named GEAR:
SETUP MENU > EMS SETUP > SENSOR INPUT MAPPING > C37 Pxx >
> FUNCTION: CONTACT
> SENSOR: CONTACT
> NAME: GEAR
To configure the GEAR contact alert for retractable landing gear:
Install the GEAR contact that when the landing gear is up, the state of the contact is UP and when the landing gear is down, the state of the contact is DOWN.
• SETUP MENU > AIRCRAFT INFORMATION:
> LANDING GEAR TYPE: RETRACT
> LANDING GEAR CHECK SPEED: (set as appropriate for your plane)
> LANDING GEAR OVERSPEED: (set as appropriate for your plane)
To configure the GEAR contact alert for amphibious landing gear:
• Install the GEAR contact that when the amphibious landing gear is configured for landing on water, the state of the contact is WATR and when the amphibious landing gear is configured for landing on land, the state of the contact is LAND.
• SETUP MENU > AIRCRAFT INFORMATION:
> LANDING GEAR TYPE: AMPHIB
> LANDING GEAR CHECK SPEED: (set as appropriate for your plane)
> LANDING GEAR OVERSPEED: (set as appropriate for your plane)
• SETUP MENU > SYSTEM SETUP > AUDIO SETUP > LANDING GEAR > VOICE
As for the actual annunciations, those are in the pilot's guide. Here's what you'll hear for each:
“Check Gear” : The aircraft is configured as a
Retractable gear, and the Landing
Gear is UP, and the aircraft is
descending through the configured
minimum warning speed.
“Gear Overspeed” :
The aircraft is configured as either a
retractable or amphibious gear, the
landing gear is not UP, and the
airspeed is exceeding the configured
maximum gear down speed.
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