A quick and dirty interface to the DD2702H remote.
Seriously. This is hacky hack hacky. But it's all hidden in a nice little case, so I don't really care.
It requires removing the DD2702H from the stock case, soldering some wires to it, and hooking up an esp32.
- 1 - DD2702H remote
- 1 - Custom PCB
- 1 - Nekmit Dual Port Ultra Thin Flat USB Wall Charger
- 1 - Wemos D1 Mini (esp32)
- 2 - Strips of female connectors for Wemos D1 Mini
- 3 - 1k through-hole resistors
- 3 - 2N3904 PNP transistors
- 1 - DD2702H Remote
- 11 - Male pins; angled preferred
- Some wires to connect them
The example yaml for ESPHome contains all you should need to get started. ESPHome is awesome, and I'm lazy.
I ordered the PCB from OSHPark.com by uploading the KiCAD files. Turn-around time was a week, and the boards from OSHPark are high quality.
The case I've printed and am using is provided in the case folder as an .stl file.
There's also the openscad source, if you're interested. It requires YAPP_Box to work.
Assembly Guide
- Remove remote PCB from stock enclosure
- Solder wires to the up/stop/down buttons; optionally the channel buttons (I skipped the channel buttons)
- Solder ground wire to remote button battery holder
- Solder female pins into Wemos D1 Mini spot
- Solder resistors
- Solder transistors matching silkscreen
- Solder male header pins
- Solder wires to remote buttons as desired - one end should be a female connector
- Use electrical tape to hold the battery in position
- Use electrical tape to protect the bottom of the custom PCB
- Insert the remote PCB into the case; it should fit nicely on the pegs
- Place a dab of hotglue in the center; place the custom PCB on top of it
- Connect a USB cable to the Nekmit; hot glue that sucker down
- Put the lid on the case
- Plug into wall
