https://github.com/norman-thomas/epson-projector-remote
EPSON projector remote via RS232 running on an ESP8266
https://github.com/norman-thomas/epson-projector-remote
epson-projector esp-12f esp8266 iot mqtt-client remote-control rs232 witty
Last synced: about 1 year ago
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EPSON projector remote via RS232 running on an ESP8266
- Host: GitHub
- URL: https://github.com/norman-thomas/epson-projector-remote
- Owner: norman-thomas
- Created: 2017-01-22T10:14:50.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2019-02-16T10:54:26.000Z (over 7 years ago)
- Last Synced: 2025-04-05T02:21:55.783Z (about 1 year ago)
- Topics: epson-projector, esp-12f, esp8266, iot, mqtt-client, remote-control, rs232, witty
- Language: C++
- Homepage:
- Size: 309 KB
- Stars: 8
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# epson-projector-remote
A simple EPSON projector remote via RS232 running on an ESP8266.
This is not intended to be as exhaustive as openHAB's addon. The plan is to have a small feature set of just powering on and off, as (sadly) more than that is not yet supported by Apple's HomeKit. This small project is just a relais to use with my [homebridge particle.io plugin](https://github.com/norman-thomas/homebridge-particle-io) so I can turn on my projector via Siri.
This was tested using an EPSON EH-TW4400 projector.
# Setup
## Equipment
* ESP8266 compatible controller
* EPSON projector (EH-TW 4400, in my case)
* RS232 interface (MAX3232 chip)
* 4 jumper wires
## Wiring
The Wiring is very straight-forward. Simply connect the following pins from your controller to the MAX3232 (RS232) board:
* `Vin`—`Vcc`
* `GND`—`GND`
* `RX`—`TXD`
* `TX`—`RXD`
Just pay attention to really connect the RX(D) with TX(D) and vice versa.
# Commands
The functions listed below are exposed via MQTT topics.
* `.../devices/projector/power`, depending on the payload it will either turn on or turn off the projector or request the current power status
* if payload is `1` or `on` the projector will be powered on
* if payload is `0` or `off` the projector will be powered off
* if payload is `?` or empty the projector will be publish a topic with its current power status. This is equivalent to the next topic below.
* `.../devices/projector/refresh` asks the projector to publish a topic with its current power status
I disabled the default behavior of the LEDs on the ESP8266 and serial board. They are constantly turned off. While sending a command it briefly turns red.
# Resources
[EPSON Business Projector Documentation](https://files.support.epson.com/Epson_Handbook/html/p85_rs232.html)
[EPSON Home Projector Documentation](https://epson.com/Support/wa00572)
[openHAB Addon](https://github.com/openhab/openhab1-addons/tree/master/bundles/binding/org.openhab.binding.epsonprojector)