Wemos D1 with Wemos OLED shield and buttons.

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mattlward · #1 Post by **mattlward** » 06 Feb 2018, 19:45

I am trying to figure out how to use the buttons on the side of the display shield. I would like to either send and MQTT command with a button press or use one button to wake up the display on a nightstand sensor. Maybe even 1 button to turn wake the display and the other to set the screen contrast now that it is working in the dev branch.

Any ideas??? Hate to have 2 buttons that are not doing anything!

Thanks Matt

TD-er · #2 Post by **TD-er** » 06 Feb 2018, 20:06

Nice to see people are already using the contrast feature

The Oled Framed plugin does support some button. But I guess I could add a command to set the contrast (temporary, without storing it to flash).
Then you can call it from rules.

Are these buttons connected to some GPIO pins?
The you can use the switch plugin on them.

Domosapiens · #3 Post by **Domosapiens** » 06 Feb 2018, 20:18

If you look here
https://wiki.wemos.cc/products:d1_mini_ ... led_shield
this document
https://wiki.wemos.cc/_media/products:d ... v2.0.0.pdf
Shows Key1 is default connected to D3 (GPIO0)
Key2 is default connected to D4 (GPIO2)
with the option to solder other connections (SJ3-SJ6 and SJ7,SJ9-SJ11)

mattlward · #4 Post by **mattlward** » 06 Feb 2018, 20:21

They can be attached to about any GPIO via a solder bridge! That would be so cool if you could do that. If it controls the contrast then it could control the on or off state of the display.

Relevant section of the board schematics:

mattlward · #5 Post by **mattlward** » 09 Feb 2018, 21:51

How would one tie a gpio to contrast control on the led?

mattlward · #6 Post by **mattlward** » 09 Feb 2018, 22:38

That should have read, how would one tie gpio state changes to OLED contrast control?

grovkillen · #7 Post by **grovkillen** » 09 Feb 2018, 22:38

I would use a switch device per button and then use rules together with a dummy device to make the button control stuff.

mattlward · #8 Post by **mattlward** » 09 Feb 2018, 22:40

Does that mean that the rules have access to control OLED contrast?

grovkillen · #9 Post by **grovkillen** » 09 Feb 2018, 23:02

No, you're right. The contrast is not yet a command. Please open a issue on GitHub and we'll see what we can do.

Only "On", "Off" and "Clear" are being obeyed when calling this command: "OLEDFRAMEDCMD"

TD-er · #10 Post by **TD-er** » 09 Feb 2018, 23:14

grovkillen wrote: ↑09 Feb 2018, 23:02 No, you're right. The contrast is not yet a command. Please open a issue on GitHub and we'll see what we can do.

Only "On", "Off" and "Clear" are being obeyed when calling this command: "OLEDFRAMEDCMD"

Any suggestions on syntax for such commands?
Please note them here: https://github.com/letscontrolit/ESPEasy/issues/839

mattlward · #11 Post by **mattlward** » 10 Feb 2018, 00:46

Added comment to the Git thread.

Wemos D1 with Wemos OLED shield and buttons.

Wemos D1 with Wemos OLED shield and buttons.

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