LCD (20x4 made in China)

[D'rMorris]

This is really great !!

I got my LCD's and it's working like a charm! The only thing I can't quite get is this.
I have 2 screens attached. One has address 27, one has address 3f.

I've modified your script to my parameters and it works on only one screen. In lcd_display.py, should I just add the second address like this:

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import i2c_lib
from time import sleep

# LCD Address
ADDRESS = 0x27
ADDRESS = 0x3f

Or do I have to change something in your script? I changed the TotalScreens to 2 in your script.

[D'rMorris]

hhmmm no, that didn't work . I just realized that the TotalScreens variable only determines which of the screens you get to see.
If you set it to 2, you will only get the screen_home and screen_system.

Just adding the second screen to the lcd_display.py obviously does not work. Do I need to create 2 variants of lcd_display.py and lcd.py for each screen I want to control?
So for example:
- lcd1.py that imports lcd_display.py_1 (which has address 0x27 in it)
- lcd2.py that imports lcd_display.py_2 (which has address 0x3f in it)

EDIT: indeed, when you create it like I described above, you can have 2 screens with different information on them .
This is cool!!

Now I'm still figuring out what to do with the lcd_init and lcd_off scripts.
I have to get myself a Python noob book, so that I can do all kinds of cool stuff with this .

[NickHead]

lcd2small.jpg (129.29 KiB) Viewed 5494 times

I got one i2c and a very large parallel one going on mine.

[gizmocuz]

just have a look in the mysensors forum topic here, and my V_CUSTOM implementation
you can request any sensor value from domoticz that you want

[marcel19]

i understand this is a old post,
but i'm trying to get it to work.

i have the following setup:
1X raspberry pi 2 with domoticz installed
1X Slimme meter kabel P1: https://www.sossolutions.nl/slimme-meter-kabel
1X Arduino UNO with this lcd shield: https://benselectronics.nl/lcd-1602-lcd-key-pad-shield/

Domoticz is up and running, and working like a charm.

It would be pretty nice, when i can display the usage of the power and gas meter to the display.
Can someone help me out with this setup, and coding?

if it's possible to use that display directly to the Raspberrypi then i prefere that option.

[jadijkstra2000]

When I have time I Will check for you!

[edwin1234]

very nice project
i will try this too
thanks

[MikeF]

Did you see my posts dated 25 October 2015 in this thread? I'm using a separate Raspberry Pi, and displaying multiple screens of data from Domoticz.

[Jufo]

HI

Where can I find the library "from lcd_display import lcd"

Best Regards
Robert

[MikeF]

@Jufo,
There's a library called lcd_display in the zip file attached to this earlier post in this thread (pepijn » Sunday 17 May 2015 20:51) :

This is a nice tutorial (in Dutch) on how-to connect the screen.
http://www.gejanssen.com/howto/i2c_disp ... index.html

I also attached my Python scripts.

[Jufo]

@MikeF

Thanks,
I have another question, how to collect data about your computer domoticz:

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def screen_systeem():
	lcd.clear
	lcd.display_string_l(unichr(255)+" Systeem "+unichr(255)+unichr(255)+unichr(255)+unichr(255)+unichr(255)+unichr(255)+unichr(255)+unichr(255)+unichr(255)+unichr(255), 1)
	lcd.display_string_l("Processor   : " + get_domoticz_sensor(7)["Data"],2)
  	lcd.display_string_l("Geheugen    : " + get_domoticz_sensor(1)["Data"],3)
	lcd.display_string_l("Temperatuur : " + get_domoticz_sensor(4)["Data"],4)

You probably you are using virtual devices, but have an interesting script to retrieve the data?

My small upgrade for temperature:

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deg =chr(223) + "C"

Thanks

[MikeF]

@Jufo, as I mentioned in an earlier post:

The values in the get_domoticz_sensor() calls are the idx's of my various Domoticz devices

- you can find the idx's for your devices in Setup > Devices in Domoticz.

I also did that upgrade for degrees C in a later version. As well as this, if you define

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ch = chr(255)

then you can do the following (e.g.), to avoid typing unichr(255) multiple times:

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lcd_string(ch + " System " + (ch*11), 1)

(I find I come across these little tweaks by Googling / trial-and-error - I'm no expert!)

[Jufo]

My script for RPi stats:

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#!/bin/bash

#CPU_Temp
CPU_Temp=`/opt/vc/bin/vcgencmd measure_temp|cut -c6-9`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=21&nvalue=0&svalue=$CPU_Temp"`

#CPU_Usage
CPU_Usage=`top -bn 1 | awk 'NR>7{s+=$9} END {print s/4}'`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=19&nvalue=0&svalue=$CPU_Usage"`

#RAM_Usage
RAM_Usage=`free -m | awk 'NR == 2 {printf "%.2f\n", $3*100/$2}'`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=20&nvalue=0&svalue=$RAM_Usage"`

#HDD_Usage
HDD_Usage=`df $PWD | awk 'NR > 1 {print $5+0}'`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=22&nvalue=0&svalue=$HDD_Usage"`

[pepijn]

My script for RPi stats:

Code: Select all

#!/bin/bash

#CPU_Temp
CPU_Temp=`/opt/vc/bin/vcgencmd measure_temp|cut -c6-9`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=21&nvalue=0&svalue=$CPU_Temp"`

#CPU_Usage
CPU_Usage=`top -bn 1 | awk 'NR>7{s+=$9} END {print s/4}'`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=19&nvalue=0&svalue=$CPU_Usage"`

#RAM_Usage
RAM_Usage=`free -m | awk 'NR == 2 {printf "%.2f\n", $3*100/$2}'`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=20&nvalue=0&svalue=$RAM_Usage"`

#HDD_Usage
HDD_Usage=`df $PWD | awk 'NR > 1 {print $5+0}'`
OUTPUT=`curl "http://192.168.3.200:8080/json.htm?type=command&param=udevice&idx=22&nvalue=0&svalue=$HDD_Usage"`

Domoticz supports raspberry pi system monitoring by default. The script just uses the Domoticz devices. So you don't need to run a script to collect these values.

[Jufo]

Domoticz supports raspberry pi system monitoring by default. The script just uses the Domoticz devices. So you don't need to run a script to collect these values.

Good!. How to start? ))

Best Regards
Robert

[MikeF]

Good!. How to start? ))

First, decide how many screens you want, and what you want to display in each screen
- you can rename / add / delete the def screen_xxx() sections, but ensure that all the names are in the screens dictionary immediately afterwards, and that TotalScreens is correct.

Then, for each screen, change the lcd.display_string_l lines to correspond to your Domoticz devices
- change the text to appear at the left
- the parameter in get_domoticz_sensor() is the idx of the Domoticz device, as found in the Setup > Devices page
- the value in [] is the key of the data item from the JSON for that device (see below)
- add any text to appear on the right
- the last number is the row on the screen.

To find the key of the data item to display, you'll need to type the following in your browser:

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http://<Domoticz URL>:<port>/json.htm?type=devices&rid=<idx>

(replacing values in angle brackets as appropriate)
For example in my system, one of my temperature devices (called "Lounge") has idx = 211, so typing

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http://192.168.0.63:8080/json.htm?type=devices&rid=211

I get:

Spoiler: show

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{
    "ActTime": ​1487542149,
    "ServerTime": "2017-02-19 22:09:09",
    "Sunrise": "07:10",
    "Sunset": "17:24",
    "result": 
[
{
    "AddjMulti": ​1.0,
    "AddjMulti2": ​1.0,
    "AddjValue": ​0.0,
    "AddjValue2": ​0.0,
    "Barometer": ​1023.4,
    "BatteryLevel": ​72,
    "CustomImage": ​0,
    "Data": "22.8 C, 41 %, 1023.4 hPa",
    "Description": "",
    "DewPoint": "8.86",
    "Favorite": ​1,
    "Forecast": ​5,
    "ForecastStr": "Some Clouds",
    "HardwareID": ​24,
    "HardwareName": "MySensors_2",
    "HardwareType": "MySensors Gateway USB",
    "HardwareTypeVal": ​41,
    "HaveTimeout": false,
    "Humidity": ​41,
    "HumidityStatus": "Comfortable",
    "ID": "1303",
    "LastUpdate": "2017-02-19 22:04:51",
    "Name": "Lounge",
    "Notifications": "false",
    "PlanID": "2",
    "PlanIDs": 
            [
                ​2
            ],
    "Protected": false,
    "ShowNotifications": true,
    "SignalLevel": "-",
    "SubType": "Weather Station",
    "Temp": ​22.8,
    "Timers": "false",
    "Type": "Temp + Humidity + Baro",
    "TypeImg": "temperature",
    "Unit": ​3,
    "Used": ​1,
    "XOffset": "350",
    "YOffset": "277",
    "idx": "211"
    }
],
"status": "OK",
"title": "Devices"
}

The value I want is "Temp", so my code for this is:

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   lcd_string("Lounge   : " + str(get_domoticz_sensor(211)["Temp"]) + deg,2)

I hope this helps.

[Jufo]

...

I'll have everything I've done and it works.
My script shows how to get data on Domoticz.
On the LCD I already have all from Virtual Devices and others.
I'm interested in how to acquire data about RPI "Domoticz supports raspberry pi monitoring system by default."

Best Regards,
Robert

[MikeF]

Domoticz supports raspberry pi system monitoring by default. The script just uses the Domoticz devices. So you don't need to run a script to collect these values.

I'm interested in how to acquire data about RPI "Domoticz supports raspberry pi monitoring system by default."

What @pepijn means is: If you look in Setup > Devices in Domoticz, you will see the Raspberry Pi devices listed under Hardware = Motherboard - Domoticz provides these by default. Therefore you can just leave it to the python program to get these values - you don't need a separate script, but if this works for you, that's fine.

[Jufo]

I do not see sensors RPI in "devices" (except for by myself added - Virtual Devices)

[MikeF]

Ah, I wonder if you've got 'Hide Disabled Hardware Sensors' checked in Settings?