Description
LC12S BK2461 Chip 128 CH UART Wireless Data Transparent Transmission Module 2.4G Wireless Serial Transceiver Module
Product Description
Feature
●Half-duplex communication, strong anti-interference ability ●2.4GHz ISM frequency band, 128 channels adjustable, no need to apply for use ●Supply voltage: 2. 8-3.6V, maximum output power 12dBm ●Receiving sensitivity -95dBm ●Transmitting working current 40mA@12dBm 25mA@OdBm ●Receive working current 27mA ●Sleep current 10uA ●Standard TTL level UART serial port ●The working frequency can be set, multiple modules are frequency-division multiplexed, no mutual interference ●Communication protocol conversion and RF transceiver switching are automatically completed, and the user does not need to interfere, and it is easy to use ●Communication rate 0. 6kbps -38. 4kbps, users can configure through AT commands ●Long transmission distance, up to 120 meters in open area without interference ●Small size SMD package, no antenna needed, easy installation
Specification
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item
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value
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Working frequency
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2.4Ghz
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RF chip
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BK2461
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Receiving sensitivity
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-95dBm
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Launch operating current
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40mA@ 12dBm
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Receive working current
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27mA
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Operating Voltage
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2.8-3.6V typical 3.3V
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Interface
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UART serial port
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Line of sight
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120 meters
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Pin name
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Pin function
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Description
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VCC
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Power supply
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Power supply (2.8~3.6V) Typical 3.3V
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RXD
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Module data input (TTL level)
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Serial communication data reception
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TXD
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Module data output (TTL level)
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Serial communication data transmission
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SET
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Set bit
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Configuration parameter enable (low level enable parameter configuration, floating for high level)
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CS
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Dormant
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Work when the pin is connected to a low level, and float to a high level
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GND
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Power supply
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Grounded
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ANT
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External antenna interface
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When connecting an external antenna, you need to remove the 0 ohm resistor at the PCB antenna connection.
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Application field
Remote control, data collection, smart home, industrial control, robots, smart home appliances
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Module parameter setting
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parameter
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Set up
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1
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0xaa (command byte)
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2
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0x5a (command byte)
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3, 4
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Self ID 2Byte (Module D)
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5, 6
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Net ID 2Byte (Network ID)
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7
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Nc (reserved) must be 0x00
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8
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RF Power lByte(0~14)
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9
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Nc (reserved) must be 0x00
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10
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Baud 1Byte(0~6) baud rate
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11
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Nc (reserved) must be 0x00
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12
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RF channel 1Byte (0~127)
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13, 14
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Nc (reserved) must be 0x0000
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15
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Nc (reserved) must be 0x00
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16
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Lenght 1Byte(0x12)
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17
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Nc (reserved) must be 0x00
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18
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CheckSum 1Byte (add all the above bytes) reserve the lower 8 bits
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Note: It is recommended not to use multiples of 16, since the V2.0 version of the module has a fixed module ID, which cannot be modified
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Data Format Host sending: 0xaa+0x5a+ module ID+ networking (ID must be the same) +0x00+ RF transmit power+0x00+ serial port rate+0x00+RF channel selection+0x00+0x00+0x12 (byte length)+0x00+sum check byte Note: and validation byte = so the byte module of parameter accumulation promises success E.g: Host sends: AA50000000000000004000A000000120024 Refer to the following data table, the above configuration parameter setting wireless module is: Network ID: 0000 RF transmit power: 12dbm Serial port rate: 9600bps RF channel: 10 Sum check byte: 24 Return data: AA5B0521000000000004000A00000012004B When setting, the node ID is invalid. You can set as many as you want. It will not affect the real ID of the module, but the last byte and checksum must be correct. In the return parameter, the module ID will be returned. For example, the above model The block ID is: 0X0521 Query parameter command: AA 5C 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 18 (HEX format) Query version number command: AA 5d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 07 (HEX format) Returns: 02 00 01 (HEX format) Factory setting: AA 5A 00 00 00 00 00 00 00 00 04 00 64 00 00 00 12 00 7E (HEX format) Operation instructions: After power-on, when the CS (Power-down) pin is connected to low level, it works. The SET pin is to set the parameter flag. Pull it low or short to ground to switch the module to parameter configuration mode. TXD and RXD pins work at high level. Serial port settings: Once in the setting state, the indicator light will be on, the SET pin configuration must be low level, the CS pin must be connected to low level, and the serial port setting must be data bit 8, baud rate 9600, parity bit N, Stop bit 1, air speed 1Mbps. Indicator light description: The indicator light is always on in the setting state, until it goes out in the working state, both the received data and the transmitted data indicator light are on.
RF power setting: Set the transmit power, [Parameter] occupies 1 byte. Setting range: 0-14 level
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Parameter
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RF Power
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0
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12dbm
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1
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10dbm
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2
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9dbm
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3
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8dbm
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4
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6dbm
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5
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3dbm
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6
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0dbm
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7
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-2dbm
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8
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-5dbm
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9
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-10dbm
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10
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-15dbm
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11
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-20dbm
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12
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-25dbm
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13
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-30dbm
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14
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-35dbm
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Explanation
1. It can communicate normally after about 20ms after power on. 2. Data can be received and transmitted within 2-15ms from sleep to wakeup. 3. Data can be transmitted after 2ms from sleep to wakeup. If polling for sleep work, after waking up, delay 2ms and then send serial data. After the data is sent, there will be a certain time delay (because the wireless has not been sent, the delay is 1 byte 1ms according to the data length, and the data is correct. ) Go to sleep again, otherwise the data will not be sent out. 4. When writing the program to set the parameters, you can check the return command data to ensure that the setting is successful and the waiting time.
Serial port baud rate
Set the transmission rate of the serial interface, [Parameter] occupies 1 byte Setting range: 600 1200 2400 4800 9600 19200 38400
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Parameter
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Baud rate
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0
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600bps
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1
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1200bps
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2
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2400bps
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3
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4800bps
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4
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9600bps
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5
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19200bps
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6
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38400bps
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Details Images