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The AT-09 is a module that contains a BLE chip (a CC2540/CC2541). This module allows performing serial communication with the BLE chip thanks to an Rx and a Tx pin. This module is also very similar to the HM-10 module and is also compatible with it. So if you have some experience with the latter, you will get started quickly with the AT-09.
This small size Bluetooth 4.0 TTL transceiver module allows your target device to communicate with your iPhone/iPad, IOS 6 or Android 4.3 above devices. You can set it as a slave or master and use AT command to set the baud rate.
Specifications:
| Input Supply voltage (V) | 3.6 ~ 6 |
| BLE Chip | CC2540/CC2541 |
| Input Current (渭A) | 90 ~ 400 |
| Maximum Operating Range (m) | 60 ~ 100 |
| Operating Temperature (掳C) | -20 ~ +75 |
