My mini board.

@nagelc Yes I did. My bootloader - https://github.com/mysensors-rus/STM32_Mysensors_bootloader. My modified MySensors library - https://github.com/mysensors-rus/MySensors. Short description in Russian - https://mysensors-rus.github.io/STM32-OTA-MySensors

How can I increase the number of blocks greater than 2048?

[2017-12-05 16:04:36.925 Info] REPO FW "STM32_RS485_Node_Relay" loaded. t=100, v=7, blocks=2048, crc=0xCC88
[2017-12-05 16:04:36.926 Info] REPO FW repository loaded. Items=2
[2017-12-05 16:04:52.544 Info] INFO FW "STM32_RS485_Node_Relay" assigned to node 100
[2017-12-05 16:04:52.545 Info] INFO Send FW info to node 100: type=64, version=7, blocks=0x0800, CRC=0xCC88

For STM32F407ZGT6, it may take up to 65k blocks. And in the controller, I understand it is a hard limit on 2048?