Heartrate Example issue

[lidiyag]

I am new to tinygo-org/bluetooth package.
I tried to run the heartrate example in the repo.

My setup is as follows:

1. Peripheral device(Ubuntu Laptop)
   https://github.com/tinygo-org/bluetooth/blob/release/examples/heartrate/main.go
   I ran this code as the peripheral

2. Central device(Mac Laptop)
   https://github.com/tinygo-org/bluetooth/blob/release/examples/heartrate-monitor/main.go
   I ran this code as my central device

I could identify from logs that the scanning and connection to peripheral was successful. Also the central discovered the service and characteristic successfully.

I could verify the peripheral is writing successfully to the characteristic as well. But unfortunately, I am not able to receive any notifications on the central.

// Enable notifications for the characteristic

errEnable := char.EnableNotifications(func(buf []byte) {
	println("data:", uint8(buf[1])))
})
if errEnable != nil {
	println("Enable Error", errEnable)
} else {
	println("Enabling notfcns on char is success")
}

The enable notification was successful, but it never printed the data on central side.

I also tried reading the characteristic by adding bluetooth.CharacteristicReadPermission on peripheral and the following code in central

    dataRead := make([]byte, 2)
len, errRead := char.Read(dataRead)
println("Length of char data read", len)
println("data:", int(dataRead[1]))
println("Error on Data Read", errRead.Error())

This mostly errored with a timeout error on read. It gave me data only once.
Can someone help me in to figure out why this is happening?

[deadprogram]

Sounds like the same change as #182 might address this?