It might be a small board, but the Nano RP2040 Connect packs a hardware punch. The six-axis smart IMU with AI capabilities tells the board which way it’s moving and adds fall sensing and double-tap activation. For example, you get a built-in microphone for sound activation, audio control and even AI voice recognition. This Arduino board is designed with a couple of handy sensors that will benefit your next projects. It gives you full WiFi 802.11b/g/n connectivity, along with Bluetooth® and BLE v4.2. The u-blox NINA-W102 radio module makes this the only connected RP2040 board. Details What are the key benefits of the Arduino Nano RP2040 Connect with headers? Get Connected Benefit from extra storage, as this Arduino board has 264KB of SRAM and 16MB of flash memory off-chip. It has a dual-core Arm Cortex M0+ microcontroller running at 133MHz. # include "FS.h" # include "SD.h" # include "SPI.h" # include "RTClib.h" # include "DHT.The Arduino RP2040 Connect with headers brings the new Raspberry Pi RP2040 microcontroller to the Nano form factor. If we can not open the file, we write an error message and at the end of the script we wait for 2 seconds. To see the string in the serial monitor of the Arduino IDE, we write the same string to the serial USB connection. If the file is available we write the dataString to the opened text file and close the file. Therefore we open the text file with the open function of the SD library and set the path to the text file and use the argument FILE_WRITE to open the file with writing permission. The next step is to write the complete string to the SD card. Therefore we connect all measurements and separate them with a comma. After we have all values that we want to save to the SD card we create one string that will be one line in the text file that we create on the SD card. Now the humidity and temperature is read from the DHT sensor and also the current time in unix datetime format from the RTC. The loop function start with the creation of an empty string. In the last line of the setup function we initialize the DHT object.Īfter the setup function the RTC, the DHT sensor and the SD card module are ready to operate. If something failed during the initialization, we get an error message in the serial monitor. The real-time clock is set to the date and time when the sketch is compiled. With the following three if statements we initialize the real-time clock and the SD card module. Now we wait until the serial communication channel is established. In the setup function we set the baud rate to 9600 that have to match the baud rate of the serial monitor. The Arduino uses pin 10 and the ESP8266 pin D8 for the default SPI chip select connection.īefore we enter the setup function we create an DHT object with the previous defined DHT pin and type. If you use another digital pin for the CS line, remember that you do not connected the pin to other components, because the SD card library will use the default pin. In my case I use the default chip select pins. In the next two lines we define the chip select pin to identify the SD card module on the SPI communication line. If you use the DHT11, you only have to change the type in this line to DHT11. println( "error opening datalog.txt") īecause I use the DHT22 temperature and humidity sensor, I have to define the DHT type as DHT22. println( "Initialization failed!") įile dataFile = SD. println( "RTC lost power, lets set the time!") # include "SPI.h" # include "SD.h" # include "DHT.h" # include "RTClib.h" # define DHTPIN 7 // used for Arduino //#define DHTPIN D4 // used for ESP8266 # define DHTYPE DHT22 const int chipSelect = 10 // used for Arduino //const int chipSelect = D8 // used for ESP8266
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