Order yours hereDescription:
The HC-11 433MHz Wireless Serial Port Module is based on the TI C1101 ultra low-power wireless transceiver IC. As well as the C1101 wireless transceiver, the module also includes a microcontroller with preprogrammed firmware (no programming required by the user) that provides seamless connection via a TTL serial UART interface. Using this interface the module can operate in one of 3 modes:Command mode (Pin 5 pulled low)
Allows for text based serial 'AT' commands to be sent to the module, or remote module(s) allowing for various configuration options to be set such as Local/Remote Channel, address, baud rate, etc. Serial pass-through mode (Pin 5 high)
Any serial data sent to the module will be transmitted to any receiving module on the same channel and address and will be present on its Tx pin. Conversely any serial data sent to a remote modules serial interface received by the local module. IO Mode
By issuing an appropriate AT command whilst the module is in command mode the module can be reconfigured from wireless serial pass-through mode to a wireless digital IO mode. In this mode the Rx, Tx, and Con pins are reconfigured as digital IO pins. Whilst in this mode the same pins any module configured as a slave can be controlled by the state of the of these pins on the transmitter module. This allows for remote device to be digitally controlled without the use of a microcontroller. Pinout:Features:
433.4-473.0MHz operation (depending on channel)
Ultra-low power consumption (3.5mA or 22mA depending on mode) with sleep option (80μA).
10dBm output power and high sensitivity providing long range in the open environment.
3V～6V operating voltage.
Serial pass through mode to replace the serial cable (half duplex).
IO pass through modes.
3V interface with 5V tolerance.
You can set the frequency and set the address, and dozens of instructions, automatic filter
8.Small size (13.5 × 28.2mm).
255 selectable addresses
20 selectable channelsDefault Settings:
Baud rate: 9600
Module address: 0
Tx Power: 8 (10dBm)AT Commands:Communication test:
Response: OKChange module address:
Address can be in range of 000 to 255Change baud rate:
Response: OK- B9600
Baud rate can be set to 1,200, 2,400, 4,800, 9,600, 19,200, 38,400, 57,600, and 115,200*
* 155200 baud supports sending data in 245byte bursts only.
Note that the BAUD rate in command mode is always 9600 baud.Change Channel:
Valid channels are from 001 to 020Configure a remote module:
where Y can be either address (A), baud rate (B), or channel (C) and X is the required parameter
E.g. To change remote channel to channel 5
Response: Remote module returns ECR
Note that remote module must be in AT mode.Change module to IO mode:
Where <Y> specifies module will be either a master (M) or slave (S) and <X> specifies either follow (F) or turnover (T) mode.
E.g. To set module as master follow mode
E.g. To set module as slave follow mode
When both master and slave are in follow mode state of slave pins will mimic master pin state.
When both master and slave are in turnover mode, state of slave pins win flip when a negative edge is applied to the master the appropriate master pin.
Note: Once in IO mode, to get back into command mode you will need to cycle the modules power whilst pin 5 is held low. Wait at least 1 second before issuing any AT commands.Configure module to serial mode:
Where <X> is optional and specifies the serial port transmission mode. Valid vales for <X> are between 1 to 4
Mode 1 is compatible with V1.7 modules.
Mode 2 low power 400ms idle current (80uA) mode. Baud rates from 1200 to 4800 in 245 byte bursts are only valid.
Mode 3 10ms mode. Idle current is 23mA
Mode 4 Increased transmission range. Baud rante must be below 9600.
Response: OK+FU1Change Tx power:
Where <POWER> is the Tx power setting and can be from 1 to 8 representing -30dBm, -20dBm, -15dBm, -10dBm, 0dBm, 5dBm, 7dBm, and 10dBm respectively.
E.g. To set maximum 10dBm power
Response: OK-P8Get module parameters:
Where <X> can be address (A), baud rate (B), channel (C) and Tx power (P).
E.g. To get the current baud rate
Response: B9600Get baud rate, channel, address, and power:
Response: U1\r\nB9600\r\nC001\r\nA000\r\nP8\r\nConfigure serial port parameters:
Where <PARITY> can be odd (O) or even (E) and <BITS> be one (1), two (2), or 1.5 stop bits (3).
E.g. To set parity to odd and stop bits to 1
Response: OK-UO1Get module version:
Response: HC-11_V1.8To put module into low power sleep mode:
Note: Module will not go into sleep mode until command mode is exited. To wake module from sleep mode endter command mode again.Reset the module to default:
Note: Address, channel, and serial port will be configured to their defaults.Datasheet: