telink_zigbee_ble_concurrent_sdk-2.4.1.0 issue

TL_HUANLI

Thank you so much for your feedback. The firmware got erased because it’s larger than 256KB and the BLE_OTA_SERVER_ENABLE macro was enabled. In the BLE OTA function, the extra areas will get erased. The reason the tl721x firmware got bigger is that the BLE protocol stack supports multiple connections, so both the firmware and RAM sizes increased. You can change the configuration to fit a 2M flash, and the firmware can go up to 512KB.   

wes58

<div class="quote"><blockquote><font size="2"><a href="https://forum.telink-semi.cn/forum.php?mod=redirect&goto=findpost&pid=102893&ptid=98603" target="_blank"><font color="#999999">TL_HUANLI 发表于 2026-9-18 14:07</font></a></font> Thank you so much for your feedback. The firmware got erased because it’s larger than 256KB and th ...</blockquote></div> Thanks for your help. That's a great news that there is a solution to this issue. I will try to do this and advise of the result. Have a great weekend.

wes58

After applying your changes everything works fine now. I tried to update firmware of one of my devices and it worked. I modified one of your changes. You had: `FLASH_ADDR_OF_OTA_IMAGE         (0x80000)` I changed it to: ``` #if (FLASH_CAP_SIZE_2M || FLASH_CAP_SIZE_4M) #define FLASH_ADDR_OF_OTA_IMAGE         (0x80000) #else #define FLASH_ADDR_OF_OTA_IMAGE         (0x40000) #endif ``` I did it to match your changes to `NV_BASE_ADDRESS` and `CFG_NV_START_FOR_BLE` that depend on flash size Thank you for your help

TL_HUANLI

I'm glad the information was helpful.😄