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#Arduino mega serial port how to#
#Arduino mega serial port install#

The Arduino Mega has in total one 3.3V pin and four 5V pins, which are able to provide a current up to 50 mA. A good example of this comes from the Arduino Physical Pixel tutorial. Because the Mega is the biggest Arduino microcontroller, this beast has the highest number of pins and is therefore suitable for large projects where a lot of devices have to be connected to the microcontroller. This can be done by sending one character across, each with a different meaning. The easiest way to get around this is to try to avoid using characters and numbers at the same time. Numbers are also tricky because they may not actually fit in the byte. However, if there are both characters and numbers are going through, this can lead to messing up the data because a number and a character can have the same byte value, but that does not make them the same. When it is just characters being sent through the serial, it is relatively easy to convert from characters to bytes. These bytes are then read one byte at a time by the other Arduino. When sending things through serial, everything is sent in bytes. Also, note that TX goes to RX and RX goes to TX.

There has to be a common ground between the two or else it will not function properly. This shows two Unos, but if a Mega is used, it can be connected to any of the Serial ports on the Mega as long as that is accounted for in the code.

#Arduino mega serial port how to#

The schematic below shows how to connect the two Arduinos together.

This tutorial will focus on Arduino-Arduino communication through the serial ports (RX and TX).

This can be done in several methods, using I2C and Serial, to list a few. Having Arduino-Arduino communication can be useful for many projects, such as having one Arduino to run motors and having another sense the surroundings and then relay commands to the other Arduino.

Not all pins on the Leonardo and Micro support change interrupts, so only the following can be used for RX: 8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).It is possible to chain Arduinos together in such a way as to get communication between the two.

Connect it to your ArduinoĬonnect the GND pin of the HM-10 module to GND pin of your Arduino.Ĭonnect the VCC pin of the HM-10 module to the 3.3V pin of your Arduino.Ĭonnect the RX and TX pins to Digital Pins of your Arduino: You may need to create the libraries subfolder if its your first library. Place the HM_10_Serial_Port_BLE library folder into your /libraries/ folder. Rename the uncompressed folder to HM_10_Serial_Port_BLE. I chose 57600 because at the time I had set the speed. For example I could obviously change the speed of Serial 1 on the Arduino, On Serial 2 we could also change the Serial speed by issuing AT+IPR57600 command. click the DOWNLOADS button in the top right corner. The caveat here is that all three serial ports on the Arduino Nano have to be equal to each other or at least of a lesser speed.

#Arduino mega serial port install#

Install the QueueList Library from the Arduino Playground ( ). It is based on the Arduino SoftwareSerial Library and requires the QueueList library from the Arduino Playground ( ) Installation This is an Arduino library for the HM-10 Serial Port BLE Module (Bluetooth 4.0).