Some modules use DIO2 to switch the antenna between RX and TX and a separate GPIO to power the antenna switch on or off. Switching the antenna switch off can reduce the power consumption. The GPIO used to control the antenna power is defined as RADIO_RXEN. LOW == power off, HIGH ==...
*1: C7 and C8 are ceramic capacitors included by the author of this project. They are not present on the original Silicon Labs schematic. Actually, you can use also electrolytic capacitors. Values between 2.2uF to 10uF will work well. *2: R4 and R5 are pull-up resistor included by the ...
When the program starts, it prompts you to give the values to control the speed of the motor. You need to enter a value between 0 and 255 in the Serial Monitor. In the 'loop' function, the command 'Serial.parseInt' is used to read the number entered as text in the Serial Monitor ...
Sending an analog signal to a digital pin induces it to toggle between HIGH and LOW states, especially if the signal is near the boundary between the two states; this toggling induces some noise to the near circuits like the ADC itself (and induces a higher energy consumption). ...
In this example two loops are executed one after the other to increase and then decrease the value of the output on pin 9. 在本例中通过 2 个循环,首先增加输出针 9 亮度,然后降低输出针 9 亮度。 参考1 示例代码及解析 (5)参考资料 - See Also: ...
(i.e. shift the value one bit to the right), yielding an address between 0 and 127. However the addresses from 0 to 7 are not used because are reserved so the first address that can be used is 8. Please note that a pull-up resistor is needed when connecting SDA/SCL pins. Please...
8–10, the bias values between both devices are small and close to zero (i.e., no significant difference between the measurements recorded by both devices). Accordingly, in agreement with earlier studies reported by Critchley and Critchley26 the difference between the measurements of the reference...
例如if(a=10&&a=20)/trueifaisbetween10and20指针运算符&(引用)和*(间接引用)指针对于C初学者来说是更复杂的对象之一。并且可能写大量的Arduino程序甚至都不会遇到指针.无论如何,巧妙地控制特定的数据结构,使用指针可以简化代码,而且在自己工具箱中拥有熟练控制指针的知识是很方便的。位运算位与按位与(&)按位...
boolean newDirectory() { // Create a subdirectory, converting the name between char arrays and string objects char fileArray[64]; String fullPath; sprintf(fileArray, DIR_FORMAT, nextDirIndex); // Generate subdirectory name fullPath = BOTTOM_DIR + String(fileArray); // Make a filepath out...
Upload it, open the serial monitor, and try sending values between 0 and 3. Now send 4. Get how it works? Let's check out the code: The setup should look quite familiar, except one command: this is awhile-loop. A while-loop repeats, as long as the condition between the brackets ...