Just a similar issue some new LCD s arrived and swapped them into an existing working Sketch and got nothing

I was using "0x27" so tried "0x3F" and I got back light, good start. Then turned the little pot (Contrast) on the back a bongo, text. All good.

LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7,3,POSITIVE); // Set the LCD I2C address
LiquidCrystal_I2C lcd(0x3F,2,1,0,4,5,6,7,3,POSITIVE); // Set the LCD I2C address

@fleinze said:

I think you can do this with a lua script on domoticz:

Thanks, but I have dumped Domoticz and will go with my own Pascal program and serial controller. It's still way too early days for any useful Controllers, although OpenHab 2 seems to be finally getting the memo. Controllers have to be more than just pretty graphs and buttons to be called a controller. Right now they are not much more than software switches.

Did you notice that Domoticz calls home two times every time you start it? I blocked that in my router.

1 -Nano+DHT
#define MY_NODE_ID 10
1 -Nano + 4-relays pins 5,6,7,8
#define MY_NODE_ID 12
1 -Nano SerialGateway
I assume it is Node 0?
1 -PC puTTY
I am getting a steady stream of data from the DHT, all good. But, I can't seem to get the relays to do anything when I send from puTTY

12;1;1;1;0;1+ 0A <-- just the character appended
as in with no spaces
12;1;1;1;0;1A

There is nothing much in Serial gateway 2.0, do I need to include the "Serial Event" etc?

Some sample code would be a great help.

Thanks

Is there a jumper on the two pins at the other end of the serial board on the back? My most recent ones came withOUT those and I get no back-light or red-LED on the serial board until I put a jumper on them.

**Found 0 device(s).

Are you sure you have it all wired correctly?
SDA goes to ANALOG pin 4
SCL goes to ANALOG pin 5

Also, looking at your first Post I don't think 0x20 is a valid address for LCD. Try the two I posted above one-at-a-time and don't forget the Contrast pot on the back, the little blue block.

I will try YourDuino and see what I get.

p.s.
POSITIVE being in all caps suggests it is a Global predefined Constant so just use it EXACTLY as I provided above. Copy, paste and try one at a time.

Is there a configuration option to add line feeds to each line? I am using a windows program to read the serial port data and lack of line feeds is driving it nuts. I can't find anywhere to add LF but the text coming in definitely only have 0x0A on the end. I understand that is a C-thing but I need a Windows thing.

Just a similar issue some new LCD s arrived and swapped them into an existing working Sketch and got nothing

I was using "0x27" so tried "0x3F" and I got back light, good start. Then turned the little pot (Contrast) on the back a bongo, text. All good.

LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7,3,POSITIVE); // Set the LCD I2C address
LiquidCrystal_I2C lcd(0x3F,2,1,0,4,5,6,7,3,POSITIVE); // Set the LCD I2C address

How do I get Domoticz to control the relays for a swamp cooler? I have a four relay board for Fan-High/Off, Fan Low/Off, Pump On/Off, and Purge Pump On/Off. I currently have an Arduino sketch controlling the relays using a direct wired DHT NOT using MySensors at all and it is working well, but difficult to make changes as it is all mounted inside the swamp housing.

The plan is to use the MySenors-DHT to send temp/Humidity to Domotics and then have it control the relays with a dumb Mysensors Relay-Sketch on the swamp.

The change over between fan-speeds needs a delay of about 6-seconds to save undue load when changing speed up/down. That's how it worked from new so the manufacturer thinks it is a good idea.

I need Domotcz to watch the temp and when it is above the desired set point, turn the Pump on, the Fan on High for about ten minutes then check the temp and see if it needs to go Low or stay High. It needs to run for about ten minutes between each speed change to balance the temps throughout the house. I tried just running off the temp changes but it was hunting badly. It needs some form of Hysteresis and the fixed run time serves both purposes for that.

I want to also use the same MySensors-DHT to control baseboard heating in Winter and another set of four relays at the main power board. But first I need to understand how to get Domoticz doing the swamp control. IF Domoticz is capable of doing that. I know OpenHab can, but the programming overhead for that is disgraceful!

Thanks, my mistake, did not have the things configured correctly. I now have three devices visible. Two are shown correctly, the first as Light (relays) and the other Temp/Humidity (DHT) but the Gateway is showing as "Temp" but I guess I can ignore that.

I will start a new thread on what I am trying to do now that the three Arduinos are all visible in Domoticz.

I have just installed Domoticz and added hardware as a DHT sensor and using the serial gateway. I have read the docs PDF, but can't find anything on adding details to make it work. In the Devices page it shows "DHT-sensor" and a blue button with "Settings" but cannot find where or what to do to make it work.

Could someone point me at some instruction. Thanks

MySensors people / Webmaster !!
Who thought fixing the editing box to the bottom left corner of the screen was a good idea?

Read here!
http://www.healthycomputing.com/office/setup/monitor/

This is making my neck ache.