bttagtest by hamjudo

Bluetooth wireless-tag.com communication test with wt-51822-s4at

Does not work well on our hardware because our processor is not running at 3.3 volts, so we put 2.2kOhm resistors on RX and TX. We just need communication from the Arduino to the Bluetooth module. We can then read the data on a cell phone with the wireless-tag app.