Specifications

1
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ESHM1901
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2.4GHz Bluetooth Low
Energy Module
with PCB or External
Antenna
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Features
◢ CPU: nRF51822-QFAC (ARM CortexTM-M0 32 bit processor)
◢ Memory: 256KB flash + 32KB RAM memory
◢ 250 kbps, 1 Mbps, 2 Mbps supported data rates
◢ On-air compatibility with nRF24L series
◢ Transparent transmission (Bridged method) easy to use and fast, no Bluetooth protocol stack Development
experience can use too
◢ The user interface uses a standard UART (TTL) Interface, bidirectional data read, easy to operate Supports
serial AT commands, the user can modify the basic parameters like the serial port baud rate, Name, MAC
address of the module, etc.
◢ Serial data packet length, single data packet can support data length up to 200byte
◢ Serial hardware enable control, low-power control applications
◢ With the support under the test mode but not connect the serial mode, mutual communication between Test
module and bluetooth master devices
◢ Module comes with PCB or External Antenna
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Specification
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Item Min. Typical Max. Unit Condition
Operation Voltage
1.8
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3.6 V
AVDC、VCCnRF
Baud Rate
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9600 57600 bps
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RF Frequency Range 2379
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2496 MHz
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Operating Temperature -20 25 +65
˚C
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Antenna
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PCB or External Antenna
Dimensions
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21.8mm*13.5mm*2mm