Chris Green wrote:
> Simple Simon  wrote:
>> I am working on a battery powered car and want the Pi to shut down
>> automatically if the battery starts to go flat to try to prevent SD card
>> corruption. I am a beginner to bash scripts! I will run this via crontab...
>>
>> #!/bin/bash
>> powerstatus=$(vcgencmd get_throttled)
>> if [ $powerstatus="throttled=0x1" ]
>> then
>> echo Under Voltage Detected - Shutting Down
>> sudo halt
>> else
>> echo Voltage Normal
>> fi
>>
>> Obviously it is not working!! Could someone correct and explain for me
>> please.
>
> You need spaces in the test:-
>
>      if [ $powerstatus = "throttled=0x1" ]
>
> Without the spaces you are just testing if '$powerstatus="throttled=0x1"'
> is not an empty string, and it never will be an empty string.
>
>
Brilliant - many thanks - works a treat - I was almost there!!

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