Embedded system client LwM2M library

I’m implementing the Anjay LwM2M library into our product.

To evaluate the system, I got a sample from Anjay that is running in a development kit with FreeRTOS and cellular connectivity.

I’m having some problems, as described at my post First steps with cumulocity , and @Stefan_Witschel suggested that should be the client library that I’m using at the moment.

Someone, with more experience with this kind of integration, have some suggestions of libraries that I can use to integrate our product with the Cumulocity system?