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This product is a good fit for general maker builds
PCBA size：59*69*19mm
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AT-09 CC2541 BLE 4.0 UART Module - HM-10 Compatible ntag203 It steps up 0The 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.
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