We are trying to connect a 3.3 V TTL sensor to Linkit Assist 2502. We have followed devlopers guide and could transmit message from linkit assist to the sensor and sensor is receving message from assist and behaving as expected.
Unfortunately, assist is not receiving any data from sensor. Our application has used API "vm_dcl_register_callback" to register callback function to receive VM_DCL_SIO_UART_READY_TO_READ event. The application callback function is never executed.
VM_PIN_P8 & VM_PIN_P9 are configured for UART operations.
It will be really a great help if we get some guidance to get his up and running.
Other than the pin confugration API and the call back registration API, do we need any other setting to get this working?
Note: Sensor is tested to make sure it is sending and receiving data. So we believe, its something to do with the kit and we are missing something that is very much needed to get it up and running.