Description
- the core module size is:27mm * 13mm * 2mm.txd:serial transmission,3.3v ttl level.rxd:serial receive,3.3v ttl level.cts:serial flow control.rts:serial flow control.dc:simulates,burns the clock foot.dd:simulates,burns the data foot.rst:module reset pin,which requires a reset of not less than 5ms.
- vcc:module power pin,requires 3.3v dc power supply,power supply current of not less than 100ma.operating voltage range:2.0v ~ 3.6v.gnd:module common ground.led:module led output pin,high-level output,then the led when the series resistance.
- before the connection,the host does not record the address from the machine,the light every 100ms; host records from the machine address,bright 900ms per second; slave every 2 seconds on for 1 second.the led is always on after connection.
- key:input pin,internal pull-down.this pin connects high level,used for the host to clear the recorded slave address.
- pio:extended function,used to set the module master-slave mode,the default internal pull-up resistor for the slave; external pull-down resistor 1k to the ground,the host.
this is a hc-08 bluetooth serial port module.
