# TimeSynchronization of LoRaWAN on B-L072Z-LRWAN1

**URL:** <https://www.thethingsnetwork.org/forum/t/timesynchronization-of-lorawan-on-b-l072z-lrwan1/71056>\
**Category:** Uncategorized\
**Created:** [April 1, 2025, 6:27pm UTC](https://www.thethingsnetwork.org/forum/t/timesynchronization-of-lorawan-on-b-l072z-lrwan1/71056 "2025-04-01T18:27:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![wenpengzhu](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/w/aeb1de/32.png) [@wenpengzhu](https://www.thethingsnetwork.org/forum/u/wenpengzhu)\
**Post date:** [April 1, 2025, 6:27pm UTC](https://www.thethingsnetwork.org/forum/t/timesynchronization-of-lorawan-on-b-l072z-lrwan1/71056/1 "2025-04-01T18:27:34Z")

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Hello everyone, I’ve been researching time synchronization for LoRaWAN recently. I’m using the B-L072Z-LRWAN1 development board from STMicroelectronics, and I want to achieve time synchronization between the board and TTN. I have thought of a few methods, such as using the LmHandler function **LmhandlerDeviceTimeReq** (although it appears that this function cannot be used because my board only supports LoRa v1.0.3). Therefore, I’d like to ask if there is a better method to achieve this, for example using **CLASSB** (although I don’t know how to implement it; could someone help me with this?)