PIC micro 18F452 to control an RN42 module. PSU for the module, level converter (5 <>3V3) and USART, all previously tested, working OK. Module's CTS kept low since the start.
Within the first 60 seconds after power up, the RN42 recognizes the $$$ command, returning CMD with GPIO5 starting to blink a LED at 10 HZ, all as expected.
Whatever I send after, whether a correct command of any type, garbage or just --- to exit, the RN42 does not react. The module's TX pin shows no activity at all.
There is hope because the 1st command being recognized, but then...what am I doing wrong?
Within the first 60 seconds after power up, the RN42 recognizes the $$$ command, returning CMD with GPIO5 starting to blink a LED at 10 HZ, all as expected.
Whatever I send after, whether a correct command of any type, garbage or just --- to exit, the RN42 does not react. The module's TX pin shows no activity at all.
There is hope because the 1st command being recognized, but then...what am I doing wrong?