The RFduino LED On/Off shows how to send data from the app to RFduino. The app uses device.writeDataArray and the RFduino uses RFduinoBLE_onReceive(char *data, int len).
Now I want to send data to the app. I guess the RFduino can use RFduinoBLE.send(). But I do not know how the app can receive this.
Ask, and ye shall receive.
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