i2c+timer+work keeps getting -22 or -128 and keep crashing

Question

Hi, 
 
 I am using i2c to get sensor data. At first the client write a value to the service. In the service on write callback it trigger's a timer, in the timer, it submit a work. In the work handler, it reads data and then notify the client. 
 
 but the notify keeps returning -22 or -128, the bluetooth is connected, and the notify data is correct. 
 
 When the client disconnect, the chip crashed and auto restarted. 
 
 How should I fix this? 
 
 Thanks,

ovrebekk · Accepted Answer

Hi 
 Why do you use a timer to trigger the work item, do you need to add a delay to the sensor readout? 
 Is the notification ever successful, or will it always return an error? 
 Have you tried to debug the call to gatt_notify(..) so you can see exactly where in the code the error is returned? That can usually provide more details than the error code alone. 
 Would you be able to share the code showing how the sensor is read and the notification sent? 
 Best regards Torbjørn

i2c+timer+work keeps getting -22 or -128 and keep crashing

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