Grove - Blueseeed LE - Dual model (HM13) uses a CSR dual-mode Bluetooth chip, with the ARM architecture single chip which supports AT instructions, Users can develop flexibly according to the serial baud rate, equipment name, and pairing password.
Highlighted Features
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BT Version: Bluetooth Specification V4.0 & BLE
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UART send and receive max bytes is 512
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Another device to module in SPP mode: 90 Bytes per packet
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Another device to module in BLE mode: 20 Bytes per packet
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Two data transmission modes, balance mode, and high-speed mode
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Working frequency: 2.4GHz ISM band
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Modulation method: GFSK(Gaussian Frequency Shift Keying)
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RF Power: -23dbm, -6dbm, 0dbm, 6dbm.
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Speed: Asynchronous: 3K Bytes
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Synchronous: 3K Bytes
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Security: Authentication and encryption
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Service: Slave SPP, Peripheral BLE, UUID FFE0, FFE1
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Power: +3.3/+5.0VDC 50mA
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Long range: SPP 30 meters, BLE 60 meters
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Power: SPP 13.5mA, BLE 9.5mA
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Working temperature:–5 ~ +65 Centigrade
Specifications
K2:During connected status, It would be disconnected by pressing K2 more than 100ms. During the sleeping model, It could be restored by pressing K2 factory settings.
U1:U1 is the wireless module, It includes an automatic power-on reset circuit.
D1:The led displays two work models: sleeping whit It slowly flashing; connected status whit It continuously lighting.
J1:The standard Grove connector.