midi2mqtt adaptation for iobroker Script Engine
based on https://github.com/TheOriginalAndrobot/midi2mqtt
The script is just a temporary solution. I am currently using it to send messages to the MQTT adapter in iobroker.
I initially installed the midi2mqtt on the same Raspberry Pi 4 as the iobroker was running on and the delay between MIDI command recognized in the midi2mqtt and received mqtt message in iobroker MQTT was about a minute (using timestamps with both in debug mode). So I checked whether I could send a message directly from the script engine in iobroker using the same mqtt library and it was without a delay. Last but not least I adjusted the whole script to run in the script engine. I just checked the receiving of MIDI signals to control some hue devices (dimming, switching on/off).
Next is to implement MIDI directly into iobroker as an adapter. For more flexibility RTP-MIDI (MIDI over network) should be used either by a direct implementation or via a virtual device/proxy (some references on the topic are available below).
- In the iobroker script engine instance add the NPM modules "mqtt" and "easymidi"
- Create a new JavaScript script in iobroker Script Engine and paste the content of iobroker-script-midi2mqtt.js
- if the "require" section is marked red with an error "Cannot find name 'require'." just try, this is at the time of writing a bug in the code editor.
Adjust the following two lines with your information:
var MQTT_BROKER = 'mqtt://192.168.0.10';
var MIDI_DEVICE = 'Numark ORBIT:Numark ORBIT MIDI 1 20:0'The MIDI device information can be retrieved by starting the script and looking at the log, e.g.:
info javascript.0 (1381) script.js.media.MIDI2MQTT_Test: Available MIDI inputs: Midi Through:Midi Through Port-0 14:0,Samson Graphite M25:Samson Graphite M25 MIDI 1 20:0,Numark ORBIT:Numark ORBIT MIDI 1 24:0,RtMidi Output Client:RtMidi Output 131:0
info javascript.0 (1381) script.js.media.MIDI2MQTT_Test: Available MIDI outputs: Midi Through:Midi Through Port-0 14:0,Samson Graphite M25:Samson Graphite M25 MIDI 1 20:0,Numark ORBIT:Numark ORBIT MIDI 1 24:0,RtMidi Input Client:RtMidi Input 130:0
Here you can see two MIDI devices (the number might change if you add more MIDI devices, initially the Numark device had 20:0, when I added the Samson this changed to 24:0):
Numark ORBIT:Numark ORBIT MIDI 1 24:0
Samson Graphite M25:Samson Graphite M25 MIDI 1 20:0
Original script: https://github.com/TheOriginalAndrobot/midi2mqtt
https://github.com/ravelox/pimidi --RTP MIDI proxy for raspberry pi https://github.com/jdachtera/node-rtpmidi https://github.com/mik3y/pymidi https://github.com/lathoub/Arduino-AppleMIDI-Library http://www.humatic.de/htools/nmj