Are you sure you have it wired correctly? The Amazon page and YouTube video show ATAD as the Middle pin on the TX module. That's the data input. You're wiring your Arduino's D9 (data output) to the far left pin on the TX module.
Are you sure you have it wired correctly? The Amazon page and YouTube video show ATAD as the Middle pin on the TX module. That's the data input. You're wiring your Arduino's D9 (data output) to the far left pin on the TX module.