Thanks for the reply, Oliver. I looked at your project, but I didn't understand much. I don't know anything about programming languages anymore. I'm an electrician ... So if you helped me a little, I'd be grateful. When initial power up the default is PIR off if you switch the PIR On straight away the display will go off as the PIR takes a minute or so to initialise before detecting movement. It would take far too long to explain all the code but here is a very brief guide on how to change the words and when they are displayed.

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The module locations are shown below. The four sensors are located in the recesses on the main board behind the rear board. Holes are cut into the rear board to allow access for fit the Chicago Bolts/Sensor pads. Photo 8 Using a drill bit to suite your LEDs (6mm in my case) and using the punched holes as a guide for the drill bit drill out all 256 LED mounting holes. A PIR sensor module is used to shutdown the display when no one is in the room (this can be disabled to keep the display always on). The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air,and sends out a digital signal on the data pin.

The LED matrix numbers starts top left and start from 0 so "{ 0, 0, 3 }" is the first LED across and down the 3 just means the 3 LEDs across including this one will light. As the letters THE are in this position the word "THE" is displayed. LED: 13. There is a built-in LED connected to digital pin 13. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off.

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When no movement is detected the display turns off after a set period of time. When the PIR is enabled the displays shows "PIR ON" and when disabled (display always on) it shows "PIR OFF" Note when the PIR is not enabled the display is always On. Until I find a fix leave the BST pin connected to R5 and change summer and winter via the time setting menu. Two small holes are drilled in the lower edge of the rear MDF board to allow air from the room to circulate around the sensor.Hi I am not sure if this is the project to start with if you know nothing about programming. You are an electrician but do you have any knoledge of electronics? This is quite a complecated project for a first project. Note there seems to be a problem with this in Summer Mode as it makes the RTC fail on loss of power.