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X728: Difference between revisions

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Q1: Why X728 V1.2 automatically shuts down?
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A:  
Q: How to restart the pi board when AC Power supply is connected?
1. X728 V1.2 will automatic safe shutdown when battery voltage is low than 3.0V, please charge in time;
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2. Please try the following operation by step:
# Remove all jumper cap,
# Remove all 18650 battery
# Place 18650 battery again and wait a few seconds before testing
 
3. What battery is recommended for X728?
 
A:Because there are so many kind of batteries, and the quality is also various. So we suggest to use the NCR18650B from Panasonic. Also '''do not use''' 18650 battery with built-in protection circuit for X728.
 
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Q3: How to restart the pi board when AC Power supply is connected?
 
A:  Please enable 'AUTO POWER ON' or 'AUTO ON' function if you want restart when the AC Power supply is reapplied.
A:  Please enable 'AUTO POWER ON' or 'AUTO ON' function if you want restart when the AC Power supply is reapplied.
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Q4: About auto shutdown, found your board auto shutdown.
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Q: Which GPIO is used to power the X728-A1 cooling fan?
A: Please check if enable the ASD function (shorted the ASD header), if you enable the ASD function, please make sure your operation is right: first, place the battery into the battery holder, insert the jumper to ASD header <span style="color:red;">after 3 seconds</span>,this is very important!!
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Q5:Is the recharge threshold and terminal battery voltage adjustable? I want to keep the batteries between 80% and 20%
 
A: Sorry, this is not support.
 
 
Q6: Which GPIO is used to power the X728-A1 cooling fan?
 
A: The X728-A1 does not occupy the GPIO, it use the PIN 2,4 to provide the power.
A: The X728-A1 does not occupy the GPIO, it use the PIN 2,4 to provide the power.
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Q: Are the batteries on X728 hot-swappable? In other words, can I connect an external power supply and swap the batteries out while that is on?
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A: Sorry, the batteries on X728 is not support hot-swappable. Please cut off the power to swap the batteries.
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Q7: How can I remove all software created by the setup and start over?
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Q: Does the rtc have a separate battery? or does it run on the 18650 batteries? what happens if you remove them? will it "lose" time?
1) sudo /etc/rc.local , delete x728pwr.sh
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2) sudo rm /etc/x728pwr.sh
A: No, the RTC function runs on the 18650 batteries. It will "lose" time if you remove the batteries.
 
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3) sudo rm /usr/local/bin/x728softsd.sh
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Q8: What are GPIO5 and GPIO12 used for X728 V1.3/V2.0?
 
A:  GPIO5 control shutdown,  GPIO12 boot.
 
 
Q9: Are the batteries on X728 hot-swappable? In other words, can I connect an external power supply and swap the batteries out while that is on?
 
A:Sorry, the batteries on X728 is not support hot-swappable. Please cut off the power to swap the batteries.
 
 
Q10: Does the rtc have a separate battery? or does it run on the 18650 batteries? what happens if you remove them? will it "lose" time?
 
A:No, the RTC function runs on the 18650 batteries. It will "lose" time if you remove the batteries.
 
 
<span style="color:red;font-weight:bold">Q11: What will lead to the X728 board be burnt out?</span>


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Q: What will lead to the X728 board be burnt out?
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A: Please make sure the polarity of battery is "+" to "+" and "-" to "-" and match with the "+" "-" mark on battery holder. The battery protection chip IC will be over-current, heat and then burnt if one or two of the batteries are connected reversely. PS: the X728 board will not be burnt immediately if one or two of the batteries are connected reversely.
A: Please make sure the polarity of battery is "+" to "+" and "-" to "-" and match with the "+" "-" mark on battery holder. The battery protection chip IC will be over-current, heat and then burnt if one or two of the batteries are connected reversely. PS: the X728 board will not be burnt immediately if one or two of the batteries are connected reversely.
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Q11: What frequency does X728 use in the I2C communication bus used to communicate with RPI?
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Q: What frequency does X728 use in the I2C communication bus used to communicate with RPI?
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A: It depends on the motherboard and OS, please refer to this topic as reference: https://forums.raspberrypi.com/viewtopic.php?p=312582  
A: It depends on the motherboard and OS, please refer to this topic as reference: https://forums.raspberrypi.com/viewtopic.php?p=312582  
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Q12:  What the maximum current rating of X728-A1 is?
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Q:  What the maximum current rating of X728-A1 is?
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A: The maximum current rating of X728-A1 is 90MA.
A: The maximum current rating of X728-A1 is 90MA.
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