Real Time Clock
The DS1307 RTC module contains a clock chip with backup power from a cell battery. This means it is able to keep track of time even when the primary power supply cuts out.
You may not wish to include an RTC if you are using a GPS receiver module, as the LoPy4 will be able to retrieve current time from that.
Interface | Supply voltage |
I2C | 5 V |
Make sure you buy an RTC module that includes the oscillator crystal and battery mount. The clock won't run without these.
You might need to buy the battery seperately, depending on your supplier. For the RTC shown, this is a CR1225 but some RTCs use a CR2032.
Current suppliers
Grove
Company | Price |
$6.90 |
Non-Grove
Company | Price |
£2.32 | |
$1.01 | |
$1.80 | |
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