The rate of the analog line signal, measured as the number of oscillations per second of the waveform. If the data is not compressed, the baud rate is equal to the number of data bits transmitted per second. If the data is compressed, the number of bits transmitted per second is usually greater than the modulation rate, so that the exchange uses baud and bits/second occasionally. error.
In the information transmission channel, the signal unit carrying the data information is called a symbol, and the number of symbols transmitted through the channel per second is called a symbol transmission rate, which is simply referred to as a baud rate. The baud rate refers to the modulation rate of the data signal to the carrier. It is expressed by the number of times the carrier modulation state changes per unit time (that is, the number of symbols modulated per second), and its unit is Baud (symbol/s). The baud rate is an indicator of the transmission channel bandwidth.
The amount of information transmitted through the channel per second is called the bit transmission rate, that is, the number of bits transmitted per second, or simply the bit rate. The bit rate represents the transmission rate of valid data, read as b/s, bit/s, bits/second, bits per second.
The relationship between the baud rate and the bit rate can also be converted into: bit rate = baud rate * the number of bits corresponding to a single modulation state
For example, suppose the data transfer rate is 120 symbols/second (symbol/s) (that is, the baud rate is 120 Baud), and it is assumed that each symbol is 8 bits, that is, eight-phase modulation (single modulation state corresponds to 3 binary bits). , the bit rate of its transmission is (120symbol/s) * (3bit/symbol)=360bps.
VCC is connected to 3.3V, GND is connected to power ground, UTXD is connected to MAX232 chip RXD, URXD is connected to MAX232 chip TXD, CH_PD is connected to VCC pull-up
Pay attention to 2 problems: the serial port baud rate is 9600 (sometimes 115200), and each string of characters should be terminated with a carriage return or line feed.
ESP8266 can be configured as three modes: staTIon, AP, and staTIon+AP. That is to say, the module can be used as a device (client) to connect to the route in the LAN. It can also be set as a route (sever), or as a client in the LAN. At the same time it is the sever of other clients!
If the serial debugging assistant can't send the AT command, but the baud rate defaults to 115200, I want to change to 9600.
AT+UART=9600,8,1,0,0
Can be modified
Lock Motor product introduction:
Safe Lock Motor, also known as The anti-theft lock motor, in the field of electronic Lock technology, Safe Lock Motor is a mechanical Lock components associated with the electronic control unit of the important parts.
Functions: it is widely used in various intelligent locks, such as Shared bicycle lock, fingerprint lock, glass lock, safe lock, hotel lock, family lock, inductive smart lock, etc
Features: Motor For Safe Lock is based on micro precision reducer development, small intelligent micro precision reducer can do 10 mm in diameter, is widely used in safe, locks, smart locks, sensor intelligent lock;
This kind of motor has the characteristics of low noise, low energy consumption, small volume, light quality, high precision, large torque and durability
Method of use: the best stable in horizontal plane, installed on the Safe Lock Motor output shaft parts, cannot use a hammer to knock, knock prone to press into the dc Safe Lock Motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
Gear Motor For Safe Lock should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a Safe Lock Motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
Gear Motor For Safe Lock should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of Dc Motor For Safe Lock is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you
Looking forward to your inquiry. Welcome to our factory.
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