Well, i have an Arduino conected to a HC-05 bluetooth and it appears to be on line on my laptop COM5 port but i doesn´t shows nothing on the arduino app.
This arduino was made by a person who was in my company and we don´t have the original code to edit it. The arduino is working for a timer (i will add a picture to show what im saying) i know nothing about arduino´s but i think i can solve it if i found the code or how to conect to it.
If anyone could help me with anything it wouldbe awesome! Thanks for all!
Without code or documentation it’s hard to guess what the intent was. Seems it’s driving a huge clock so May be the HC-05 is there to send commands to the arduino to reset the time?
You would obviously need to pair correctly with the BT module and know the baud rate of its SPP profile and then know what to send.
(It’s unfortunate such contraption was built and the code not made available… can’t the author ne reached ?)
I have the PC of him but the code was created in his home computer a long time ago, the only thing i have is the things he bought to do it but i dont know if with that i can do something like creating all the code by 0.
The thing is that the build is really strange and dificult i have taken photos to show how its done.
Photos are unlikely to be of any use. A circuit diagram with all components and Arduino pins labelled would be the very least that would be required in order to write any code to use it
When i try to conect with my computer it appears the HC-05 bluetooth conection and i conect with it, then it asks me the pass and when i put the pass it takes like 5 secs and its already gone the conection.
so it seems that your BT module is wired directly to the Serial port of the Arduino ( The TX pin is the output from the module and is 3.3V logic whilst the RX pin is the input into the module and is 5V compliant if you have the Adafruit's design)
The Arduino module comes pre-loaded with NodeMCU's Lua interpreter, you can run commands, and 'save' Lua programs directly to the module's Flash using a USB-Serial converter cable which might be what the HC-05 was used for.
If you can't get your hands on the code, there is not much that can be done besides exploring, which might be destructive for your clock as you'll loose the binary if you flash anything else on the ESP
I've never done it but I think you could use esptool.py with the read_flash option to get a dump of the firmware if no protection fuse have been set to prevent this. I'm sure there are tutorials on line.
Why are you trying to mess with the device? is it broken?
