Yoruk

Hello, Yes the message is erased at reset because I didn't use the arduino flash memory to store the message; so at each power up the default message is used.If you want to have this feature, you have to save and restore the message somewhere. It can be into a SD card for example, or you can use the EEPROM. Check these links :https://www.arduino.cc/en/Tutorial/Memoryhttps://www.arduino.cc/en/Reference/EEPROM

Great work ! Didn't know this kind of machines worked with an RS232 link.

Ok I got it. You can probably use this kind of shield :https://store.arduino.cc/arduino-gsm-shield-2-inte...Maybe cheaper modules like this can also work :https://www.aliexpress.com/item/1pcs-DIY-KIT-GSM-G...And redirect the SMS message to the leds modules, it should work.On the android side, you just have to recognize the voice and send the data through an SMS...

Speech recognition does requires a lot of computing power... A micro-controler is just not powerful enough. Didn't know is a raspberry pi can do that... Maybe ?"Can it use the normal text messaging from any Android phone to display on the matrix?" yes, if you use a sms receptor module. It does requires a SIM card."Can i use a Mega with level a shifter instead of Nano?" Yes !

I didn't write this code, so I don't really know how to update it...

Is is causing a physical problem ? Running low of memory is just a warning, normally not an error...To avoid this, you can try to switch to a larger arduino model. Inside the code, if you don't use the up and down screen feature, you can remove the mirror array used for it and keep only one.

Some other terminals free apps can work the same !

So you have to update the letters library and rotate them by 90°.You can do this by software and ask the program to output the array in the terminal window, then modify the code with this new array.

The arduino is slow... You can :-use a faster arduino (maybe the "Mega" is faster)-modify the wiring and the code to use two SPI channels instead of a single one; sending all the data on a single channel is slow. Divise the modules into two rows and use a SPI channel for each.

I don't get it... It looks horizontal here...?

Still not get it... This picture is taken on a system running WITHOUT the code presented here ?My code shows the text horizontally by default...?

As explained into an other comment, the problem is that the arduino is slow... You can :-use a faster arduino (maybe the "Mega" is faster)-modify the wiring and the code to use two SPI channels instead of a single one; sending all the data on a single "channel" is slow. Divide the modules into two rows and use a SPI channel for each.

1 - Sure you can. In this version the power directly comes from the usb connector, so my computer act as power source.2-Depends on how this new 8*32 led module works. If it works with a MAX7219 like this project, you will only need to adapt some values (column numbers....). If it's a new chip, you will have more to do...!

Putting them into a sandich with vegetables sounds tasty ^^

Here is the odd/even detection :if (m % 2 == 0) //check is the module is upside-down or not... { //here, the matrix is flipped upside-down for (int i = 0; i < 8; i++) { //loop on the columns lc.setRow(m,7-i,Buffer[i+k+8*m]); } } else { //classical for (int i = 0; i < 8; i++) { //loop on the columns lc.setRow(m,i,Buffer_inverse[i+k+8*m]); } }just replace this by only ://classical for (int i = 0; i < 8; i++) { //loop on the columns lc.setRow(m,i,Buffer_inverse[i+k+8*m]); }OR//here, the matrix is flipped upside-down for (int i = 0; i < 8; i++) { //loop on the columns lc.setRow(m,7-i,Buffer[i+k+8*m]); }(depends on the screen orientation)

Again you don't need both the Buffer and Buffer_inverse as all your screens are oriented the same way. These two arrays are containing the data, one is a vertical mirror of the other one. You just need one ! But in every cases, you SHOULD have something on all screens. I don't see why on your picture the screen 2 and 4 are blank...?Have you tried what I say ?

That's that, you have to disable the odd/even detection as all your screens are oriented the same way. But it's strange that you don't have anything on screens 2 and 4...?

Thanks for this feedback.Yes in your case the modules are not oriented like mine, so you had to flip rows/columns.For the upside down problem, you have to update the final part of the code to remove the odd/even matrix number checking. Please take a look at the comments from "Sam-Kun" in the comments to see how.What is your hardware ? Sure that everything is 3v3 ?

Example :https://www.aliexpress.com/item/C51-AVR-MCU-develo...You can find it my searching "mcu dev board"...!

Hmmm the text should start on the other side... Please try:lc.setColumn(m,i,Buffer_inverse[i+k+8*(m)]);

...this ?lc.setColumn(m,i,Buffer[i+k+8*(MatrixNumber-m)]);Please also post a picture of the background of the modules.

Please try :lc.setColumn(MatrixNumber-m,i,Buffer[i+k+8*m]);

please replace the "lc.setColumn(m,7-i,Buffer[i+k+8*m]);" by ""lc.setColumn(m,i,Buffer[i+k+8*m]);"

This is great to see how to create this kind of puzzles with limited hardware. Thanks for sharing !

Have you got something connected on the TX and RX signals ? If yes, please disconnect them during the flashing process.

You are displaying a series of ">>>" ?So you can't swap rows and columns if you want to read the text horizontally. Please try this for the last function (let everything else unchanged) : void DrawText( byte stringLength) { for(int k = 0; k < stringLength*6; k++) { delay(SpeedDelay);//delay(10000); //k is the column //buffer drawing for (int m = 0; m < MatrixNumber; m++) { //loop on the matrix //here, the matrix is flipped upside-down for (int i = 0; i < 8; i++) { //loop on the columns lc.setRow(m,7-i,Buffer[i+k+8*m]); } } }}and take a picture !If it still doens't works, I'll have to see a picture of the BACK of your modules.

Could you please show me a picture of the result ?Are all the modules wired in series ?

Please check the other comments, someone already made the transformation if I remember correctly !

Ok great. Do you have the same kind of modules than mines ?If you have vertical/horizontal scrolling issues, you have to upload the draw part, at the end of the program. You have "writeCol" methods, try using "writeRow" instead...To input the data on the computer side, any terminal software (PuTTY, Realterm) can be used.

This "generic" message means that the arduino software can't upload the program on the board. Sometime the "bootloader" ( a piece of code in the atmega chip that allow on the flow programming" got issues. Just google the message, you should get help on how to solve this...

It should that it's only a warning, it should not be a problem.What is your arduino IDE version ?

Dans ma région la farine de mais n'est traditionnellement pas très utilisée...! (Je tenterai toutefois à l'occasion !)

What is your Arduino board model ?

Sorry for late answer.Yes you can ! Just make sure to use a suitable power supply instead. (Mobile phone charger). All the circuit should work the same !

Yes ! You just have to use another power supply... (Like a mobile phone charger).It should works the same way !

I'll have to try it out. Thanks for sharing !!

Great step-by-step explanations. Thanks for sharing !

Thanks for sharing !

Never though of using a copper wire this way. Thanks for sharing !

Absolutely amazing. Congratulations !

Amazing ! Thanks for sharing.

Beautiful pictures ! Thanks for sharing.

What about watering ?

Amazing idea...!

Funny idea !!

This is so beautiful !!

My tip : test the leds one by one (with a resistor) to make sure that they are all right !

Very beautiful design and clear explanations. Thanks !

Great drying ideas; never though of using hair spray to fix the shape. Thanks for posting !

So colorful ! Love it.

You can't use more than 8 modules in series, it's a limit of the MAX7219.If you want to use more that 8 modules, you will have to use an other SPI port. You can share some signals (clock...) with the existing one ! But it's a lot of modifications in the code...

Strange... Please let me a couple of days to check this.

But is the loop working correctly ?Looks like a problem during the array initialisation...

You mean, the loop starts with the right "H" ?Have you tried to add spaces after the "Hello" word ?

The problem is that the arduino didn't get anything from the bluetooth module. Have you double-checked the wiring between the bluetooth module and the arduino ? You have to wire TX on RX (not TX-TX and RX-RX !!).And you have to use the virtual serial port, not the hardware one.Let me know...

Great news !

It's been a long time since I booted up my 600XL, but I don't remember any boot sound.What video output did you tried ? The composite is the best one to try, as the "antenna" signal can be hard to be recognized by new TVs.One thing you can do is to check the 5V on every chips inside the computer to make sure the power supply is OK.Is the led turning ON ?

Beautiful result ! Love it.

Beautiful result !

You're welcome !!!

You are right : an obstacle and the bird collision detection works the same, by computing the distance.The problem is that is there is only one bird at a time, but we have man clouds. If you want to work on multiple collision items, you will have to create an array of "distances" to store the distance between the plane and all the items.Let me know if you need more details. You can also post some code.

So beautiful !!

Never thought of using snow as a cooking ingredient. The result looks so tasty !Unfortunately we don't have a lot of snow in my country.... :-(Thanks for sharing.

A M A Z I N G result !!! This gray wood is so beautiful !!

I should have access soon to a waterjet cutting machine...

Thanks for sharing. The result is beautiful, and it looks very simple to do...Unfortunately I don't have the hardware to make my own !

Great idea, thanks for sharing !!

Love it ! Thanks for sharing.