Using the Library

Library Usage

API Documentation

For a documentation of the complete library API please use the source documentataion. This page discribes some features of the MyoBridge Library in detail.

• MyoBridge Arduino Library Source Documentation

The Connection Status Callback

Establishing a connection to the Myo Armband via the Bluetooth module is a critical step for any application using the library. If you need more information about what is currently going on or where a problem might occur, you can set a callback function that provides information about the current state during connection. Supply this function as parameter to begin():

//a function to inform us about the current state 
// and the progess of the connection to the Myo.
void printConnectionStatus(MyoConnectionStatus status) {
	
	//print the status constant as string
	Serial.println(bridge.connectionStatusToString(status));
}
.
.
.
//initiate the connection with the status callback function
bridge.begin(printConnectionStatus);

This will print the current state to the hardware serial connection, which is especially useful for debug purposes. Keep in mind that this function should have a short execution time, so it does not block the begin() function too long.

The Reset Pin

To make sure the your program will connect under any circumstances, you can also supply a reset pin when you create the MyoBridge object:

MyoBridge bridge(mySerial, RESET_PIN);

This pin has to be connected to the reset pin of your bluetooth module. Also keep in mind that the HM-11 operates at 3.3V! To address that, you can use a voltage divider or a regulator chip. A setup using software serial could look like this:

If the Bluetooth module does not respond any more or hangs in an unusable state, the library will now reset it by pulling the reset pin low for a short time.