I am trying to get a response from HC-06 with Ardhuino Nano. What is working: - The Arduino Nano is functioning: a LED is controlled - I can pair the HC-06 to my Android phone - I can see with a logic analyzer the serial signal toggle on the HC-06 Rx input (both at the 5V source and after 66% lower (with 3 1K Ohm resistors)
What is not working: - I get to response from the HC-06 Tx pin, after issuing the AT command
What I am not sure of: - Are the RxD and TxD pins active low? I can see them high all the time, and the Tx from the Arduino going low when active (when AT command is issued). Is there a pull-up somewhere? - I tried to run with the Arduino Nano Rx & Tx, and then switched to two digital outputs. I think it should work. Shout it? The reason I did it is because the connectivity of Tx & Rx from the Nano somehow caused the interface to the PC, so I couldn't download code.
What I didn't try so far: - to check if the printing on the HC-06 is correct - could it be the maker made a mistake and misplaced Rx & Tx?? - to replace the HC-06. I have another one, but if I damaged the first one, I don't want to damage the second one as well....