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interfaces:ds3231 [2016/04/09 23:28]
darron [DS3231 ZS-042] 		interfaces:ds3231 [2018/03/11 16:08] (current)
darron [DS3231 for Pi]
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 There are at least two RTC modules containing the There are at least two RTC modules containing the
 DS3231 available from China. Both can operate with DS3231 available from China. Both can operate with
-the Raspberry Pi and one is designed specicially+the Raspberry Pi and one is designed especially
 for it. for it.
  
 One useful feature of the DS3231 other than keeping One useful feature of the DS3231 other than keeping
-the time is it's built-in temperature readout, however,+the time is its built-in temperature readout, however,
 initial tests suggest that this is inaccurate. initial tests suggest that this is inaccurate.
  
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 This device plugs directly into the GPIO header. This device plugs directly into the GPIO header.
 +
 +I bought two of these devices and one was faulty. Fixing it simply involved applying
 +pressure on each pin of the chip in turn with a hot iron, these devices may not be
 +manufactured to a high standard.
  
 === DS3231 ZS-042 === === DS3231 ZS-042 ===
  
-This module contains the RTC and an EEPROM. It tends +This module contains the RTC and an HK24C32 EEPROM. It tends 
-to ship with an incompatible CR2032 battery and as the per +to ship with a CR2032 battery and, as the per 
-advice of many web sites, it's desirable to remove +advice of many web sites, it's important to desolder 
-the charge feature of the module (see schematic) when +the charge feature of the module (see schematic). 
-using a battery.+ 
 +By default the EEPROM content is 
 +<code> 
 +./mcp24 1 0x57 -d 
 +EEPROM FOUND AT 0x0057 
 +DUMP 
 +[0000] 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 |ABCDEFGHIJKLMNOP| 
 +[0010] 51 52 53 54 55 56 57 58 59 5A FF FF FF FF FF FF |QRSTUVWXYZ......| 
 +</code>