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  • Sandbird commented on TJC27's instructable IOS Kernel Debugging1 month ago
    IOS Kernel Debugging

    awesome! I had no idea it was similar to the debugging process done on PCs.Ollying an iphone :)

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  • Sandbird commented on Sandbird's instructable Automated cooling fan for Pi3 months ago
    Automated cooling fan for Pi

    hmm, any errors when you start the script manually ?Also are you running the cron with sudo ? I think it needs root permissions to run properly.Also, to stop the fan, did you try the: 'sudo python /home/pi/fan.py off' That should stop the fan, if not then probably you didnt select the proper slots on the relay. There are 3 slots. If i remember correctly depending on which slots you used, the ON functions in the script would actually do the opposite (turn the fan off) if you used the wrong setting. And then the OFF functions would turn it on instead...Basically the logic gate on the fan is reversed, if you put the cables in the wrong slots.One last thing i could think of....when you ssh to your pi (the normal way) and type: vcgencmd measure_tempDoes it give the temperature in Celsius?...see more »hmm, any errors when you start the script manually ?Also are you running the cron with sudo ? I think it needs root permissions to run properly.Also, to stop the fan, did you try the: 'sudo python /home/pi/fan.py off' That should stop the fan, if not then probably you didnt select the proper slots on the relay. There are 3 slots. If i remember correctly depending on which slots you used, the ON functions in the script would actually do the opposite (turn the fan off) if you used the wrong setting. And then the OFF functions would turn it on instead...Basically the logic gate on the fan is reversed, if you put the cables in the wrong slots.One last thing i could think of....when you ssh to your pi (the normal way) and type: vcgencmd measure_tempDoes it give the temperature in Celsius? (ex: temp=48.7'C) If not then you need to change something in the code.In the function 'get_temp_from_system' , i am 'reading' that value, but i am expecting to find the 'C part. If yours gives fahrenheit, then you need to change that 'C\n to 'F\n.And probably recalculate the temperature values, for switching on/off the fan.

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