samsungite

Hi, use a FOR loop.int num;for(int n=0;n < 4; n++){ if(sensor_value==input_array[n]) num=n;}// now use num as the index for output_array//output = output_array[num]I think this is what you are after :-)Terry

Many thanks, I'll do some more reading :-)

Hi, tryGithub.com/shaai/Arduino_Led_matrix_sketchKind regards Terry

Sometimes, what's recommended is not always necessary ! :-) :-)

Hi, can the extender have identical credentials to the router please ?

Hi, I'm sorry, I don't understand !Can you send some images please ?

Hi, many thanks for the comment, I'll checkout Mosquitto broker and MQTT messaging, both new ground for me :-)

HiI have tested with an ESP8266-01 using the circuit attached. Only mods to the program sketch are as follows:-Interrupt is now GPIO0 (was 13)relay is now on GPIO2 (was GPIO4)so all references to these pins need changing in the code.DO NOT have GPIO connected when uploading the sketch as it will fail !I have replaced the opto coupler with a BC337 & a 56 ohm resistor. Any NPN transistor should suffice. I use a resistor to limit the current - it was the value I had available that worked. I'm sure there is a mathematical formula for calculating this value :-)

CORRECTION: DO NOT have GPIO2 connected when uploading the sketch as it will fail !

Disadvantage of using ESP8266-01 & this circuit - on initial power up, both GPIO0 & GPIO2 must be high for normal boot ! The circuit holds GPIO2 sufficiently low to prevent a normal boot :-(.Replacing the 56 ohm resitor with a 3mm LED solved this !!

I had problems with the opto coupler in the hardware pictures. I had success with opto couplers labelled EL 4N35 528. I have built 3 of the switches using this component with no problems.Terry

Hi, which labels do you not understand ?Terry

Hi, your assumption is correct- I have not tested this with the esp8266-01as long as you can set one of the GPIOs as an interrupt and the other as an output the code should work.Just a note Re the opto coupler - I purchased 5 x 4N35 from the UK and the internal transistor would not turn on hard enough to enable the relay :-(. I will check the manufacture of the opto's which work and post the info tomorrow.Terry

Hi, pleased you found it helpfulTerry :-)

Hi, thank you for your comments, I am really pleased you have it working.

Thanks for viewing and commenting :-)Seemed such a waste of good hardware, I just had to make use of it !Terry :-)

Error correction The aerial length for 315Mhz transmitter / receiver should be 23.8cm in length, it is 17cm for the 433MHz

Minor error correction :I have days listed as 0 to 6, it should be 1 to 7 :-)

HiThe protues software looks interesting !!It has been a while since I programmed the PIC chips.The code has to be compiled using Microchip MPASM and then uploaded to the PIC !Programming PIC chips using assembly code can be challenging and at times, frustrating.I changed to Arduino mainly due to the amount of free knowledge and examples there are on the Internet!Programming, debugging and testing are so much easier using the Arduino - and they are so cheap too!I am not too sure what your goals are, what are you trying to achieve please? Is it for learning or a particular project?kind regardsTerry

I will try and add the original file to the projectTerry :-)

HiIf you are programming pic chips, this software is invaluable !!Terryhttp://www.oshonsoft.com/pic.html

Hithanks for the info, I will try one of the £5 units from China :-)

HiI think the display is blank because there is NO data in the eeprom!I made the project again with HC-06 and it works fine :-)First of all, copy these 8 lines of code and paste them AFTER the lineBTSerial.flush();EEPROM.write(1023,4);EEPROM.write(400,7);EEPROM.write(405,'L');EEPROM.write(406,'o');EEPROM.write(407,'c');EEPROM.write(408,' ');EEPROM.write(409,'4');msgsize=5;Recompile & upload the program to your Arduino.When uploaded, the display should show 'Loc 4'Now delete the 8 lines of code or /* rem them out */ as you only need to run this once. Re compile and upload the code again.The display should still display Loc 4.If your Bluetooth is connected correctly, you should see some strange characters on your android phone display ! (see image).The display connections are :- 5v &…

HiI think the display is blank because there is NO data in the eeprom!I made the project again with HC-06 and it works fine :-)First of all, copy these 8 lines of code and paste them AFTER the lineBTSerial.flush();EEPROM.write(1023,4);EEPROM.write(400,7);EEPROM.write(405,'L');EEPROM.write(406,'o');EEPROM.write(407,'c');EEPROM.write(408,' ');EEPROM.write(409,'4');msgsize=5;Recompile & upload the program to your Arduino.When uploaded, the display should show 'Loc 4'Now delete the 8 lines of code or /* rem them out */ as you only need to run this once. Re compile and upload the code again.The display should still display Loc 4.If your Bluetooth is connected correctly, you should see some strange characters on your android phone display ! (see image).The display connections are :- 5v & Gnd (0v)Arduino pin 8 to LCD DINArduino pin 9 to LCD CSArduino pin 10 to LCD CLKThe Bluetooth connections are :-BT Rx to Arduino Pin 5 & BT Tx to Arduino pin 4ALSO, you may have to changeBTSerial.begin(57600); to BTSerial.begin(9600); - as the HC-06 default is 9600I hope this helps Good luck :-)

HiI purchased an HC-06 ! I have tested it with arduino and android. I can send & receive messages both ways ! Therefore, my previous statement ,'the HC-06 is receive only' is totally incorrect!The sketch should run with either HC-05 or HC-06 !Apologies for the confusion. - Let me know how you get on :-)kind regardsTerry :-)

Re the ESP-8266 Door Alarm - That is brilliant !!!Many things can, and do go wrong, even to experienced people! It is great that you did not give up - well done !!There is great satisfaction when a project finally works :-) :-)I used the ESP-8266 in my 'Milk in Fridge' Instructable over a year ago & it is still working !! I can go to www.thingspeak.com and see how much milk I have when I am shopping !Re the Matrix display.If I understand you correctly, you would like to display your own messages on the display ! This is simple :-)Enter any message. When it is in the display, send the "~" character followed by a number 0 to 9, for example, Enter the message **INSTRUCTABLES** and see it on the display.If you now enter ~3 (for example) the message **INSTRUCTABLES** will be st…

Re the ESP-8266 Door Alarm - That is brilliant !!!Many things can, and do go wrong, even to experienced people! It is great that you did not give up - well done !!There is great satisfaction when a project finally works :-) :-)I used the ESP-8266 in my 'Milk in Fridge' Instructable over a year ago & it is still working !! I can go to www.thingspeak.com and see how much milk I have when I am shopping !Re the Matrix display.If I understand you correctly, you would like to display your own messages on the display ! This is simple :-)Enter any message. When it is in the display, send the "~" character followed by a number 0 to 9, for example, Enter the message **INSTRUCTABLES** and see it on the display.If you now enter ~3 (for example) the message **INSTRUCTABLES** will be stored in memory location 3. ~5 will store it in memory location 5 !So whatever is currently displayed can be stored using this method.To recall the message, use the "^" symbol for example, ^5 will load and display the message stored at memory location 5.I hope this helps :-)have funTerry :-)

Thank you. These timers are ideal for controlled switched mains sockets and so cheap too.

Its a GREAT Name :-) :-)it looks like you are correct, HC-06 is receive only.In theory, this should still work with one exception - on power up the EEPROM contents are read and sent to the mobile phone, this will not happen, however, it should still update the display as the Arduino is receiving the information !You may have to comment out any line starting with BTSerial.println, but it should work !Good luck

HiI have never used HC-06, so I have no experience or knowledge :-(this instructable should helphttps://www.instructables.com/Add-bluetooth-to-y...kind regardsTerry

HiThe connections for the Bluetooth & the Matrix display are commented in the code :-)LedControl lc=LedControl(8,10,9,4); // now 4 ///5 matrices, 5 MAX7219s.// pin 8 to LCD DIN, 9 to LCD CS, 10 to LCD CLK kind regardsTerry

Thank you :-)

Thank you Dylan. So cheap to make too, less than £15.00 without the sim card !