I recently used the Bluetooth module HC-05. I first set the serial port baud rate to 38400, entered the AT command, and
Set the Bluetooth module to master mode, then power it on again, set the baud ra
[size=4]The function parameter can be not only integer, real, character, etc., but also pointer type. Its function is to transfer the address of a variable to another function. [/size] [size=4] [/size
First, let's present a low-power one-button power on/off circuit. The characteristic of this circuit is that when the power is turned off, all transistors are cut off and almost no power is consumed.
1. The transmission distance of traditional Bluetooth ranges from tens of meters to hundreds of meters, while BLE is set at 100 meters (actually not that far, it is relatively stable within 50 meters,
The AD5933 specification sheet mentions temperature measurement: "The measure temperature command is used to start the temperature measurement. When measuring temperature, the device does not need to