I want to share an interesting case about updating the firmware over FOTA.. I have several nodes on a RS485 bus with memory chips. Recently I decided to update the firmware on several at once and ran into an unexpected problem - repeated attempts to update constantly ended up with a checksum error !OTA:FWP:CRC FAIL. At the same time, I usually test all new nodes for FOTA firmware updates before installing. I tried to understand what the problem might be and came to an unexpected result - in my case, disabling the directive OTA_EXTRA_FLASH_DEBUG, which I had been using for a long time, when I first tested updates, helped. After disabling this directive, all firmwares were updated the first time. Very strange, but nevertheless ...

Hi, for everyone who reads all of this, forget about the last few posts. I don't know why it works even when the Interrups are masked out on the radio, but it works now. The error I had occured because of the config of the OrangePi-Gateway. I removed: --extra-cxxflags="-DMY_RF24_DATARATE=\(RF24_250KBPS\) -DMY_RF24_BASE_RADIO_ID=\(0x00,0xFC,0xE1,0xA8,0xA8\) -DMY_DEBUG_VERBOSE_RF24" and wrote: --extra-cxxflags="-DMY_RF24_DATARATE=\(RF24_250KBPS\) -DMY_DEBUG_VERBOSE_RF24" Now I think I have an working OrangePi-Gateway without signing but with interrupt enabled. If there are new problems I will come back here. The next step for me is to activate signing again and bring the node into homeassistant.

THanks! it worked for me too! @hek Maybe we should put a small hint about this (first delete old MySensors 1.4) on the Downloadpage?