After more testing, I have some good news here. The PIC16F1827 I2C slave can actually work if the code is built and downloaded in MPLAB debugger mode with ICD3. However, if it is done in the programme ...
The MSSP2 serial port on the PIC16F1827 has been configured as an I2C slave and I believe the configuration is right after checking live numbers of SFRs in MPLAB. But it fails to acknowledge the ...