Hello and thanks - I have almost completed the assembly of a smart car (TSCINBUNY ZYC0072), which utilises an Arduino board and an expansion board. The final step will be to plug the Bluetooth module into the expansion board. The manual warns that the pin markings must align between the two. The VCC and the GND align, but the RXD of the module aligns with TXD on the board, and vice versa. I'm uneasy about proceeding ...maybe it doesn't matter, and the car will function successfully, but my research suggests that what I have may be a hardware error and the send/receive should not be the wrong way around. Can anybody comment on how I can move forward with this? Kind regards, Geoff.
One board's Tx is the other board's Rx. Output -> input, not output -> output and input -> input.
Perfect!
Arduino transmits (Tx), module receives (Rx) and vice versa
Thank you!! You have explained that the alignment is as it should be. Regards, Geoff.
Much appreciated. You have helped me understand how this works. Regards, Geoff.