I did a little more testing adding To and Subject and saw errors happening in the log. MakerAPI is using the commas and passing then as separate parameters to the deviceNotifiction function. I was able to fix it by adding the following to the GCal Notification driver:
//Added for use with MakerAPI where commas come across as separate parameters
def deviceNotification(message1, message2, message3, message4) {
deviceNotification(message1 + "," + message2 + "," + message3 + "," + message4)
}
//Added for use with MakerAPI where commas come across as separate parameters
def deviceNotification(message1, message2, message3) {
deviceNotification(message1 + "," + message2 + "," + message3)
}
//Added for use with MakerAPI where commas come across as separate parameters
def deviceNotification(message1, message2) {
deviceNotification(message1 + "," + message2)
}
Give this a try to see if it solves your issue. I will get this added to a new version.