power mgmt - ups shield  
  X1201 V1.1  
     
 
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       Hardware description  
   
  1 Raspberry Pi GPIO used  
     
PIN# GPIO Functions
3 GPIO2   I2C-SDA, battery fuel-gauge systems -reading battery voltage and percentage
5 GPIO3    I2C-SCL, battery fuel-gauge systems -reading battery voltage and percentage
31 GPIO6   AC power loss & power adapter failture detection, Low-power supply failed, High-power supply OK
36 GPIO16   Control battery charging, High-charging disabled, Low-charging enabled 
 
         
     

*The UPS connects to the Pi GPIO via pogo pins, If the I2C address (0x36) is not detected or failed to read AC power state or failed to control charging, please ensure to clear the leads of the pins used on the GPIO header from the bottom of the Raspberry Pi PCB and then reinstall it.

 
       
         
  2 Battery voltage level indicators  
     
Battery voltage range (V) D1 D2 D3 D4 Remark
3.87-4.2 ON ON ON ON discharging levels of 100%
3.7-3.87 ON ON ON OFF discharging levels of 75%
3.55-3.7 ON ON OFF OFF discharging levels of 50%
3.4-3.55 ON OFF OFF OFF discharging levels of 25%
Below 3.4 OFF OFF OFF OFF low battery
 
   
 
       Required hardware  
 
   1   

X1201 UPS Shield

     

Raspberry Pi 5 Model B

 
  3   18650 battery 2pcs   4   USB-C Power Supply 5V 5A  
 
 
       Hardware installation  
 
1

 

 
 
   
   
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