11.01.2021, 15:17
The path is incorrect, it must start with a "/", so it should be /home/ftp/outdoor_temp1.txt
Another issue is that you are constantly appending data to a file. If this is done very fast then the file can grow in size quickly and fill the whole partition. And as Daniel mentioned this can degrade the SD card due to constant writes.
If you want to send data to external sources look into MQTT. If you want to log data externally then InfluxDB can be used (it has very simple integration with LM).
Another issue is that you are constantly appending data to a file. If this is done very fast then the file can grow in size quickly and fill the whole partition. And as Daniel mentioned this can degrade the SD card due to constant writes.
If you want to send data to external sources look into MQTT. If you want to log data externally then InfluxDB can be used (it has very simple integration with LM).