I’m trying to use RFID reader along with a keypad in the following manner:
In a normal line follower,
On pressing 2 in the keypad at a T junction the robot takes left.
On pressing 4 in the keypad at a T junction the robot takes right.
On showing the RFID tag it must stop.
Keypad is working perfectly but though the tag is getting detected by the RFID reader, the robot is not stopping. TX LED on the board was OFF.
Without line follower, I tried simply going straight on pressing 2 and RFID to stop, IT WORKED. TX LED on the board was ON.
What is the possible problem?