Can't set option containing underscore about miio

[aholstenson]

If you check the message property of the error what does it say? I The code -5001 is invalid argument.

If the humidifier is similar to the air purifiers the led brightness is actually a number. The air purifiers use 0 = bright, 1 = dim, 2 = off.

[ben423423n32j14e]

You are correct the current LED status on my unit is: 2

I still receive the error message when attempting to send the command through miio.

The only commands I can't send are to those with the additional _ in the name.

set_led_b

return device.call('set_power', ['on']) works fine

[aholstenson]

The humidifier might do something special here. Could you run your code while setting the environment flag DEBUG to miio*? Something like this: DEBUG=miio* node pathtoscript.js

You should get lots of debug information about data sent and received, the bit from where you can see some JSON with your call until you get some other JSON as a reply can help with figuring out what's going wrong.

[ben423423n32j14e]

This is interesting, 2 is the current known state of the LED from the device status, yet it rejected it:

miio.device.[192.168.0.95] -> (2) {"id":1,"method":"set_led_b","params":["2"]}
miio.device.[192.168.0.95] <- Message: `{"error":{"code":-5001,"message":"invaild_arg"},"id":1}

[ben423423n32j14e]

BINGO, got it working :)

return device.call('set_led_b', [JSON.parse('2')])

I'll update the humidifier doc once I've tested the remaining options.

[aholstenson]

Alright! Looks like you were sending a string when the device wants a number. Most of the Mi devices are picky about that.

In the current master there is some new documentation and a device implementation to make interacting with the humidifier easier. Such as being able to call device.setLedBrightness('off') instead of using call directly.

When you know what the other options do you can open an issue and describe what you found or try to add it to the implementation in lib/devices/humidifier.js.