2020/06/28 - 1_DH_IPC-HX2XXX-Molec_MultiLang_PN_V2.800.0000000.19.R.200628
2020/10/14 - 2_DH_IPC-HX2XXX-Molec_MultiLang_PN_V2.800.0000000.24.R.201014
2025/01/21 - 3_DH_IPC-HX2XXX-Molec_MultiLang_NP_V2.820.0000000.65.R.250121

Make sure to turn off the Main Stream Record Mode in the NVR for these cameras before updating, or else it will fail!

If the 4102s Firmware is OLDER than 2020/06/28, update it to the 2020/06/28 firmware, then to the 2020/10/14 and then you can update it to the 2025 firmware.

If the firmware is newer than 2020/10/14 then you can update directly to the 2025 firmware.